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Subject: YOU ARE A WINNER!!!
From: "COCA COLA LOTTERY BOARD" <paymentoffice65@gmail.com>
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-----


REG ORDER NO:ECL/68276/08
22 Garden Close,
SE9 2YP,London
United Kingdom

THE COCACOLA COMPANY OFFICIAL PRIZE NOTIFICATION

ATTENTION WINNER:

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Email: paymentoffice64@googlemail.com
Tel:+447 045 798 693
FAX:+447 005 938 689


Yours Faithfully,
Cruze Benze(Esq).
Management





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From: JaekwonOH <jaekwon.oh@samsung.com>
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Subject: [Simple] How to show presentity's relative service preference
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Hi all,

I'm wondering how a presentity can show his perferred services in presence.
A possibility seems to use the 'priority' attribute of <contact> element for this purpose.
However, RFC 3863 defines that the 'priority' attribute shows the presentity's different preference over *contact address*, so it is not clear whether this is good enough to show the presentity's relative service preference. 
For example, when there are multiple SIP services that share the presentity's AOR as contact address, then how the different 'priority' attribute value for the same contact address should be interpreted?
IMHO, this happens because a service cannot be represented only with the contact information. Rather, as noted in RFC 4476, a service is identified by the "reach information", which is a set of presence information to reach the service including the contact address.
If this is the case, what should we do?

Thanks & regards,

Jaekwon OH

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<DIV><FONT face="Times New Roman" size=2>Hi all,</FONT></DIV>
<DIV><FONT face="Times New Roman" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Times New Roman" size=2>I'm wondering how a presentity can show 
his perferred services in presence.<BR>A possibility seems to use the 'priority' 
attribute of &lt;contact&gt; element for this purpose.<BR>However, RFC 3863 
defines that the 'priority' attribute shows the presentity's different 
preference over *contact address*, so it is not clear whether this is good 
enough to show the presentity's relative service preference. <BR>For example, 
when there are multiple SIP services that share the presentity's AOR as contact 
address, then how the different 'priority' attribute value for the same contact 
address should be interpreted?<BR>IMHO, this happens because a service cannot be 
represented only with the contact information. Rather, as noted in RFC 4476, a 
service is identified by the "reach information", which is a set of presence 
information to reach the service including the contact address.</FONT></DIV>
<DIV><FONT face="Times New Roman" size=2>If this is the case, what should we 
do?<BR></DIV></FONT><FONT face="Times New Roman" size=2></FONT>
<DIV><FONT face="Times New Roman" size=2>Thanks &amp; r</FONT><FONT 
face="Times New Roman" size=2>egards,</FONT></DIV>
<DIV><FONT face="Times New Roman" size=2></FONT>&nbsp;</DIV>
<DIV><FONT face="Times New Roman" size=2>Jaekwon OH</FONT></DIV></BODY></HTML>

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_______________________________________________
Simple mailing list
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https://www.ietf.org/mailman/listinfo/simple

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From: "Christer Holmberg" <christer.holmberg@ericsson.com>
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Hi,

As agreed in Dublin, we are planning to set up a phone meeting regarding
the alternative connection model for MSRP.

But, before that I'd like to bring up one issues we need to address:
should one be allowed to use comedia together with the current MSRP
routing model, or will comedia and SDP c/m line routing go together?

If comedia and c/m line routing go together we won't need the msrp-acm
attribute defined in the draft, because the comedia attributes will act
as indicators.

Regards,

Christer



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<P><FONT SIZE=3D2 FACE=3D"Arial">Hi,</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">As agreed in Dublin, we are planning to =
set up a phone meeting regarding the alternative connection model for =
MSRP.</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">But, before that I'd like to bring up =
one issues we need to address: should one be allowed to use comedia =
together with the current MSRP routing model, or will comedia and SDP =
c/m line routing go together?</FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Arial">If comedia and c/m line routing go =
together we won't need the msrp-acm attribute defined in the draft, =
because the comedia attributes will act as indicators.</FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Regards,</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Christer</FONT>
</P>
<BR>

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_______________________________________________
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From: "Smyth, Colm (Colm)" <smythc@avaya.com>
To: "Simple WG" <simple@ietf.org>
Subject: Re: [Simple] How to show presentity's relative service preference
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I suggest that if there are multiple contact addresses for a single AOR,
the contact element of each related tuple in PIDF should reflect a
unique contact address for this AOR, not the ambiguous AOR itself.
=20
A unique address is useful, not just as an identifier for the tuple's
source, but to reach the address; then, the priority attribute has a
meaningful scope.
=20
Colm Smyth
Lead/Architect - Intelligent Presence Server (IPS) | Unified
Communications
AVAYA | smythc@avaya.com | +353 1 656 7843 (x37843)
=20

________________________________

From: simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] On Behalf
Of JaekwonOH
Sent: 05 August 2008 02:34
To: Simple WG
Subject: [Simple] How to show presentity's relative service preference


Hi all,
=20
I'm wondering how a presentity can show his perferred services in
presence.
A possibility seems to use the 'priority' attribute of <contact> element
for this purpose.
However, RFC 3863 defines that the 'priority' attribute shows the
presentity's different preference over *contact address*, so it is not
clear whether this is good enough to show the presentity's relative
service preference.=20
For example, when there are multiple SIP services that share the
presentity's AOR as contact address, then how the different 'priority'
attribute value for the same contact address should be interpreted?
IMHO, this happens because a service cannot be represented only with the
contact information. Rather, as noted in RFC 4476, a service is
identified by the "reach information", which is a set of presence
information to reach the service including the contact address.
If this is the case, what should we do?

Thanks & regards,
=20
Jaekwon OH

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<DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D276343115-05082008>I suggest that if there are multiple contact =
addresses=20
for a single AOR, the contact element of each related tuple in PIDF =
should=20
reflect a unique contact address for this AOR, not the ambiguous AOR=20
itself.</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D276343115-05082008></SPAN></FONT>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D276343115-05082008>A unique address is useful, not just as an =
identifier=20
for the tuple's source, but to reach the address; then, the priority =
attribute=20
has a meaningful scope.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT>&nbsp;</DIV>
<DIV align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
face=3DArial>Colm Smyth</FONT></SPAN></DIV>
<DIV align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"></SPAN><FONT=20
size=3D1><FONT face=3DArial><SPAN=20
style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><SPAN=20
style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'">Lead/Architect=20
- Intelligent Presence Server (IPS)</SPAN> <FONT face=3DArial =
color=3D#ff0000=20
size=3D1>|</FONT>&nbsp;<SPAN class=3D276343115-05082008><FONT =
face=3DArial=20
color=3D#ff0000 size=3D1>Unified=20
Communications</FONT></SPAN></SPAN></FONT></FONT><SPAN=20
style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'"><BR></SPAN><FONT=20
size=3D1><FONT face=3DArial><FONT=20
color=3D#ff0000><SPAN><STRONG>AVAYA</STRONG>&nbsp;|</SPAN><SPAN=20
style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
face=3DArial size=3D1>&nbsp;</FONT></SPAN></FONT><SPAN=20
style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><A=20
href=3D"mailto:smythc@avaya.com">smythc@avaya.com</A>&nbsp;<FONT =
face=3DArial=20
color=3D#ff0000 size=3D1>|</FONT></SPAN><SPAN=20
style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'">&nbsp;</SPAN><SPAN=20
style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'">+353=20
1 656 7843</SPAN><SPAN=20
style=3D"COLOR: black; FONT-FAMILY: 'Times New Roman','serif'"></SPAN>=20
</FONT><FONT face=3D"Century Gothic" =
color=3D#808080>(x37843)</FONT></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT>&nbsp;</DIV><BR>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT face=3DTahoma size=3D2><B>From:</B> simple-bounces@ietf.org=20
[mailto:simple-bounces@ietf.org] <B>On Behalf Of =
</B>JaekwonOH<BR><B>Sent:</B>=20
05 August 2008 02:34<BR><B>To:</B> Simple WG<BR><B>Subject:</B> [Simple] =
How to=20
show presentity's relative service preference<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT face=3D"Times New Roman" size=3D2>Hi all,</FONT></DIV>
<DIV><FONT face=3D"Times New Roman" size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Times New Roman" size=3D2>I'm wondering how a =
presentity can show=20
his perferred services in presence.<BR>A possibility seems to use the =
'priority'=20
attribute of &lt;contact&gt; element for this purpose.<BR>However, RFC =
3863=20
defines that the 'priority' attribute shows the presentity's different=20
preference over *contact address*, so it is not clear whether this is =
good=20
enough to show the presentity's relative service preference. <BR>For =
example,=20
when there are multiple SIP services that share the presentity's AOR as =
contact=20
address, then how the different 'priority' attribute value for the same =
contact=20
address should be interpreted?<BR>IMHO, this happens because a service =
cannot be=20
represented only with the contact information. Rather, as noted in RFC =
4476, a=20
service is identified by the "reach information", which is a set of =
presence=20
information to reach the service including the contact =
address.</FONT></DIV>
<DIV><FONT face=3D"Times New Roman" size=3D2>If this is the case, what =
should we=20
do?<BR></DIV></FONT><FONT face=3D"Times New Roman" size=3D2></FONT>
<DIV><FONT face=3D"Times New Roman" size=3D2>Thanks &amp; r</FONT><FONT=20
face=3D"Times New Roman" size=3D2>egards,</FONT></DIV>
<DIV><FONT face=3D"Times New Roman" size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Times New Roman" size=3D2>Jaekwon =
OH</FONT></DIV></BODY></HTML>

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Even though RFC 3863 is not very well written, in my understanding the
priority attribute defined in RFC 3863 represents the relative priority
of the service among the other services listed in the presence document.
If one tuple includes multiple <contact> elements (for whatever
reason...), the numerical values for the priority attributes have to be
carefully chosen so that the relative priority of the service falls
within the intended range.
=20
Cheers,
Krisztian=20


________________________________

	From: simple-bounces@ietf.org [mailto:simple-bounces@ietf.org]
On Behalf Of ext Smyth, Colm (Colm)
	Sent: Tuesday, August 05, 2008 9:24 AM
	To: Simple WG
	Subject: Re: [Simple] How to show presentity's relative service
preference
=09
=09
	I suggest that if there are multiple contact addresses for a
single AOR, the contact element of each related tuple in PIDF should
reflect a unique contact address for this AOR, not the ambiguous AOR
itself.
	=20
	A unique address is useful, not just as an identifier for the
tuple's source, but to reach the address; then, the priority attribute
has a meaningful scope.
	=20
	Colm Smyth
	Lead/Architect - Intelligent Presence Server (IPS) | Unified
Communications
	AVAYA | smythc@avaya.com | +353 1 656 7843 (x37843)
	=20

________________________________

	From: simple-bounces@ietf.org [mailto:simple-bounces@ietf.org]
On Behalf Of JaekwonOH
	Sent: 05 August 2008 02:34
	To: Simple WG
	Subject: [Simple] How to show presentity's relative service
preference
=09
=09
	Hi all,
	=20
	I'm wondering how a presentity can show his perferred services
in presence.
	A possibility seems to use the 'priority' attribute of <contact>
element for this purpose.
	However, RFC 3863 defines that the 'priority' attribute shows
the presentity's different preference over *contact address*, so it is
not clear whether this is good enough to show the presentity's relative
service preference.=20
	For example, when there are multiple SIP services that share the
presentity's AOR as contact address, then how the different 'priority'
attribute value for the same contact address should be interpreted?
	IMHO, this happens because a service cannot be represented only
with the contact information. Rather, as noted in RFC 4476, a service is
identified by the "reach information", which is a set of presence
information to reach the service including the contact address.
	If this is the case, what should we do?
=09
=09
	Thanks & regards,
	=20
	Jaekwon OH


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charset=3Dus-ascii">
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<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D031424619-06082008><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>Even though RFC 3863 is not very well written, =
in my=20
understanding the&nbsp;</FONT></SPAN><SPAN =
class=3D031424619-06082008><FONT=20
face=3DArial color=3D#0000ff size=3D2>priority attribute defined in RFC =
3863=20
represents the relative priority of the service among the other services =
listed=20
in the presence document. If one tuple includes multiple &lt;contact&gt; =

elements (for whatever reason...), the numerical values for the priority =

attributes have to be carefully chosen so that the relative priority of =
the=20
service falls within the intended range.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN =
class=3D031424619-06082008></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><FONT face=3DArial><FONT size=3D2><FONT =
color=3D#0000ff><SPAN=20
class=3D031424619-06082008>Cheers,<BR>Krisztian</SPAN><SPAN=20
class=3D031424619-06082008>&nbsp;</SPAN></FONT></FONT></FONT></DIV><BR>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px">
  <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
  <HR tabIndex=3D-1>
  <FONT face=3DTahoma size=3D2><B>From:</B> simple-bounces@ietf.org=20
  [mailto:simple-bounces@ietf.org] <B>On Behalf Of </B>ext Smyth, Colm=20
  (Colm)<BR><B>Sent:</B> Tuesday, August 05, 2008 9:24 AM<BR><B>To:</B> =
Simple=20
  WG<BR><B>Subject:</B> Re: [Simple] How to show presentity's relative =
service=20
  preference<BR></FONT><BR></DIV>
  <DIV></DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D276343115-05082008>I suggest that if there are multiple =
contact=20
  addresses for a single AOR, the contact element of each related tuple =
in PIDF=20
  should reflect a unique contact address for this AOR, not the =
ambiguous AOR=20
  itself.</SPAN></FONT></DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D276343115-05082008></SPAN></FONT>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D276343115-05082008>A unique address is useful, not just as an =
identifier=20
  for the tuple's source, but to reach the address; then, the priority =
attribute=20
  has a meaningful scope.</SPAN></FONT></DIV>
  <DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT>&nbsp;</DIV>
  <DIV align=3Dleft><SPAN=20
  style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
  face=3DArial>Colm Smyth</FONT></SPAN></DIV>
  <DIV align=3Dleft><SPAN=20
  style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"></SPAN><FONT=20
  size=3D1><FONT face=3DArial><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'">Lead/Architect=20
  - Intelligent Presence Server (IPS)</SPAN> <FONT face=3DArial =
color=3D#ff0000=20
  size=3D1>|</FONT>&nbsp;<SPAN class=3D276343115-05082008><FONT =
face=3DArial=20
  color=3D#ff0000 size=3D1>Unified=20
  Communications</FONT></SPAN></SPAN></FONT></FONT><SPAN=20
  style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'"><BR></SPAN><FONT=20
  size=3D1><FONT face=3DArial><FONT=20
  color=3D#ff0000><SPAN><STRONG>AVAYA</STRONG>&nbsp;|</SPAN><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
  face=3DArial size=3D1>&nbsp;</FONT></SPAN></FONT><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><A=20
  href=3D"mailto:smythc@avaya.com">smythc@avaya.com</A>&nbsp;<FONT =
face=3DArial=20
  color=3D#ff0000 size=3D1>|</FONT></SPAN><SPAN=20
  style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'">&nbsp;</SPAN><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'">+353=20
  1 656 7843</SPAN><SPAN=20
  style=3D"COLOR: black; FONT-FAMILY: 'Times New Roman','serif'"></SPAN> =

  </FONT><FONT face=3D"Century Gothic" =
color=3D#808080>(x37843)</FONT></FONT></DIV>
  <DIV><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT>&nbsp;</DIV><BR>
  <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
  <HR tabIndex=3D-1>
  <FONT face=3DTahoma size=3D2><B>From:</B> simple-bounces@ietf.org=20
  [mailto:simple-bounces@ietf.org] <B>On Behalf Of =
</B>JaekwonOH<BR><B>Sent:</B>=20
  05 August 2008 02:34<BR><B>To:</B> Simple WG<BR><B>Subject:</B> =
[Simple] How=20
  to show presentity's relative service preference<BR></FONT><BR></DIV>
  <DIV></DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2>Hi all,</FONT></DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2>I'm wondering how a =
presentity can=20
  show his perferred services in presence.<BR>A possibility seems to use =
the=20
  'priority' attribute of &lt;contact&gt; element for this =
purpose.<BR>However,=20
  RFC 3863 defines that the 'priority' attribute shows the presentity's=20
  different preference over *contact address*, so it is not clear =
whether this=20
  is good enough to show the presentity's relative service preference. =
<BR>For=20
  example, when there are multiple SIP services that share the =
presentity's AOR=20
  as contact address, then how the different 'priority' attribute value =
for the=20
  same contact address should be interpreted?<BR>IMHO, this happens =
because a=20
  service cannot be represented only with the contact information. =
Rather, as=20
  noted in RFC 4476, a service is identified by the "reach information", =
which=20
  is a set of presence information to reach the service including the =
contact=20
  address.</FONT></DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2>If this is the case, what =
should we=20
  do?<BR></DIV></FONT><FONT face=3D"Times New Roman" size=3D2></FONT>
  <DIV><FONT face=3D"Times New Roman" size=3D2>Thanks &amp; =
r</FONT><FONT=20
  face=3D"Times New Roman" size=3D2>egards,</FONT></DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2>Jaekwon=20
OH</FONT></DIV></BLOCKQUOTE></BODY></HTML>

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Date: Thu, 07 Aug 2008 14:17:48 +0900
From: JaekwonOH <jaekwon.oh@samsung.com>
To: Simple WG <simple@ietf.org>, "Smyth, Colm (Colm)" <smythc@avaya.com>
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Subject: Re: [Simple] How to show presentity's relative service preference
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Hi,

Thanks for response.
Even when the device contact URI registered for an AOR is used for tuple's contact address, the uniqueness of the contact address for a tupe seems not guaranteed. For example, a device may run multiple SIP applications, then tuples for each of those would contain the same URI.
This aspect has already been clarified in RFC 4479 (see the following excerption).
Therefore, IMHO, the uniquness of contact address for each tuple seem not guaranteed, so the use of 'priority' attribute of <contact> in <tuple> is not enogh to show the presenity's relative service preference.

>From RFC 4479 section 3.3.2 reach information,

Even for services reachable over a communications network, the URI
alone may not be sufficient. For example, two applications may be
running within a cellular telephone, both of which are reachable
through the user's SIP Address of Record. However, one application
is launched when the INVITE request contains a body of a particular
type, and the other is launched for other body types. As another
example, a service may provide complex application logic that
operates correctly only when contacted from matching application
software. In such a case, even though the communications between
instances utilizes a standard protocol (such as SIP), the user
experience will not be correct unless the applications are matched.
When the URI is not sufficient, additional attributes of the service
can be present that define the instructions on how the service is to
be reached. These attributes must be understood for the service to
be utilized. If a watcher receives a presence document containing
reach information it does not understand, it should discard the
service information.


Thanks & regards,
Jaekwon OH

----- Original Message ----- 
  From: Smyth, Colm (Colm) 
  To: Simple WG 
  Sent: Wednesday, August 06, 2008 1:23 AM
  Subject: Re: [Simple] How to show presentity's relative service preference


  I suggest that if there are multiple contact addresses for a single AOR, the contact element of each related tuple in PIDF should reflect a unique contact address for this AOR, not the ambiguous AOR itself.

  A unique address is useful, not just as an identifier for the tuple's source, but to reach the address; then, the priority attribute has a meaningful scope.

  Colm Smyth
  Lead/Architect - Intelligent Presence Server (IPS) | Unified Communications
  AVAYA | smythc@avaya.com | +353 1 656 7843 (x37843)




------------------------------------------------------------------------------
  From: simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] On Behalf Of JaekwonOH
  Sent: 05 August 2008 02:34
  To: Simple WG
  Subject: [Simple] How to show presentity's relative service preference


  Hi all,

  I'm wondering how a presentity can show his perferred services in presence.
  A possibility seems to use the 'priority' attribute of <contact> element for this purpose.
  However, RFC 3863 defines that the 'priority' attribute shows the presentity's different preference over *contact address*, so it is not clear whether this is good enough to show the presentity's relative service preference. 
  For example, when there are multiple SIP services that share the presentity's AOR as contact address, then how the different 'priority' attribute value for the same contact address should be interpreted?
  IMHO, this happens because a service cannot be represented only with the contact information. Rather, as noted in RFC 4476, a service is identified by the "reach information", which is a set of presence information to reach the service including the contact address.
  If this is the case, what should we do?

  Thanks & regards,

  Jaekwon OH


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Date: Thu, 07 Aug 2008 15:25:46 +0900
From: JaekwonOH <jaekwon.oh@samsung.com>
To: simple@ietf.org, smythc@avaya.com, krisztian.kiss@nokia.com
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Subject: Re: [Simple] How to show presentity's relative service preference
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Hi Krisztian,

Thanks for response. Please find below my response:

Even though RFC 3863 is not very well written, in my understanding the priority attribute defined in RFC 3863 represents the relative priority of the service among the other services listed in the presence document.

Your understanding expands the semantics defined in RFC 3863 on the priority attribute. 
Problem is that there's no clarification on such interpretation. 

If one tuple includes multiple <contact> elements (for whatever reason...), the numerical values for the priority attributes have to be carefully chosen so that the relative priority of the service falls within the intended range.

Fortunately, the schema definition in RFC 3863 allows the <contact> element under <tuple> to occur just once (or zero). So, we could get free of this issue..

Thanks & regards,
Jaekwon OH

  ----- Original Message ----- 
  From: krisztian.kiss@nokia.com 
  To: smythc@avaya.com ; simple@ietf.org 
  Sent: Thursday, August 07, 2008 1:28 PM
  Subject: Re: [Simple] How to show presentity's relative service preference


  Even though RFC 3863 is not very well written, in my understanding the priority attribute defined in RFC 3863 represents the relative priority of the service among the other services listed in the presence document. 
  If one tuple includes multiple <contact> elements (for whatever reason...), the numerical values for the priority attributes have to be carefully chosen so that the relative priority of the service falls within the intended range.

  Cheers,
  Krisztian 



----------------------------------------------------------------------------
    From: simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] On Behalf Of ext Smyth, Colm (Colm)
    Sent: Tuesday, August 05, 2008 9:24 AM
    To: Simple WG
    Subject: Re: [Simple] How to show presentity's relative service preference


    I suggest that if there are multiple contact addresses for a single AOR, the contact element of each related tuple in PIDF should reflect a unique contact address for this AOR, not the ambiguous AOR itself.

    A unique address is useful, not just as an identifier for the tuple's source, but to reach the address; then, the priority attribute has a meaningful scope.

    Colm Smyth
    Lead/Architect - Intelligent Presence Server (IPS) | Unified Communications
    AVAYA | smythc@avaya.com | +353 1 656 7843 (x37843)




----------------------------------------------------------------------------
    From: simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] On Behalf Of JaekwonOH
    Sent: 05 August 2008 02:34
    To: Simple WG
    Subject: [Simple] How to show presentity's relative service preference


    Hi all,

    I'm wondering how a presentity can show his perferred services in presence.
    A possibility seems to use the 'priority' attribute of <contact> element for this purpose.
    However, RFC 3863 defines that the 'priority' attribute shows the presentity's different preference over *contact address*, so it is not clear whether this is good enough to show the presentity's relative service preference. 
    For example, when there are multiple SIP services that share the presentity's AOR as contact address, then how the different 'priority' attribute value for the same contact address should be interpreted?
    IMHO, this happens because a service cannot be represented only with the contact information. Rather, as noted in RFC 4476, a service is identified by the "reach information", which is a set of presence information to reach the service including the contact address.
    If this is the case, what should we do?

    Thanks & regards,

    Jaekwon OH


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<DIV><FONT size=2>Hi Krisztian,</FONT></DIV>
<DIV><FONT size=2></FONT>&nbsp;</DIV>
<DIV><FONT size=2>Thanks for response. Please find below my 
response:</FONT></DIV>
<DIV><FONT size=2></FONT>&nbsp;</DIV>
<DIV><FONT size=2><SPAN class=031424619-06082008><FONT face=Arial color=#0000ff 
size=2>Even though RFC 3863 is not very well written, in my understanding 
the&nbsp;</FONT></SPAN><SPAN class=031424619-06082008><FONT face=Arial 
color=#0000ff size=2>priority attribute defined in RFC 3863 represents the 
relative priority of the service among the other services listed in the presence 
document.</FONT></SPAN></FONT></DIV>
<DIV><FONT size=2></FONT>&nbsp;</DIV>
<DIV><FONT size=2>Your&nbsp;understanding expands the semantics defined in RFC 
3863 on the priority attribute.&nbsp;</FONT></DIV>
<DIV><FONT size=2>Problem is that there's no clarification on such 
interpretation.</FONT><FONT size=2>&nbsp;</FONT></DIV>
<DIV><FONT size=2></FONT>&nbsp;</DIV>
<DIV><FONT size=2>
<DIV dir=ltr align=left><SPAN class=031424619-06082008><FONT face=Arial 
color=#0000ff size=2>If one tuple includes multiple &lt;contact&gt; elements 
(for whatever reason...), the numerical values for the priority attributes have 
to be carefully chosen so that the relative priority of the service falls within 
the intended range.</FONT></SPAN></DIV></FONT></DIV>
<DIV><FONT size=2></FONT>&nbsp;</DIV>
<DIV><FONT size=2>Fortunately, the schema definition in RFC 3863 allows 
the&nbsp;&lt;contact&gt; element under &lt;tuple&gt;&nbsp;to occur just once (or 
zero). So, we could get free of this issue..</FONT></DIV>
<DIV><FONT size=2></FONT>&nbsp;</DIV>
<DIV><FONT size=2>Thanks &amp;&nbsp;regards,</FONT></DIV>
<DIV><FONT size=2>Jaekwon OH<BR></FONT></DIV>
<BLOCKQUOTE 
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style="FONT: 10pt &#44404;&#47548;">----- Original Message ----- </DIV>
  <DIV 
  style="BACKGROUND: #e4e4e4; FONT: 10pt &#44404;&#47548;; font-color: black"><B>From:</B> <A 
  title=krisztian.kiss@nokia.com 
  href="mailto:krisztian.kiss@nokia.com">krisztian.kiss@nokia.com</A> </DIV>
  <DIV style="FONT: 10pt &#44404;&#47548;"><B>To:</B> <A title=smythc@avaya.com 
  href="mailto:smythc@avaya.com">smythc@avaya.com</A> ; <A title=simple@ietf.org 
  href="mailto:simple@ietf.org">simple@ietf.org</A> </DIV>
  <DIV style="FONT: 10pt &#44404;&#47548;"><B>Sent:</B> Thursday, August 07, 2008 1:28 
PM</DIV>
  <DIV style="FONT: 10pt &#44404;&#47548;"><B>Subject:</B> Re: [Simple] How to show 
  presentity's relative service preference</DIV>
  <DIV><BR></DIV>
  <DIV dir=ltr align=left><SPAN class=031424619-06082008><FONT face=Arial 
  color=#0000ff size=2>Even though RFC 3863 is not very well written, in my 
  understanding the&nbsp;</FONT></SPAN><SPAN class=031424619-06082008><FONT 
  face=Arial color=#0000ff size=2>priority attribute defined in RFC 3863 
  represents the relative priority of the service among the other services 
  listed in the presence document. </FONT></SPAN></DIV>
  <DIV dir=ltr align=left><SPAN class=031424619-06082008><FONT face=Arial 
  color=#0000ff size=2>If one tuple includes multiple &lt;contact&gt; elements 
  (for whatever reason...), the numerical values for the priority attributes 
  have to be carefully chosen so that the relative priority of the service falls 
  within the intended range.</FONT></SPAN></DIV>
  <DIV dir=ltr align=left><SPAN class=031424619-06082008></SPAN>&nbsp;</DIV>
  <DIV dir=ltr align=left><FONT face=Arial><FONT size=2><FONT 
  color=#0000ff><SPAN class=031424619-06082008>Cheers,<BR>Krisztian</SPAN><SPAN 
  class=031424619-06082008>&nbsp;</SPAN></FONT></FONT></FONT></DIV><BR>
  <BLOCKQUOTE dir=ltr 
  style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
    <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
    <HR tabIndex=-1>
    <FONT face=Tahoma size=2><B>From:</B> simple-bounces@ietf.org 
    [mailto:simple-bounces@ietf.org] <B>On Behalf Of </B>ext Smyth, Colm 
    (Colm)<BR><B>Sent:</B> Tuesday, August 05, 2008 9:24 AM<BR><B>To:</B> Simple 
    WG<BR><B>Subject:</B> Re: [Simple] How to show presentity's relative service 
    preference<BR></FONT><BR></DIV>
    <DIV></DIV>
    <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN 
    class=276343115-05082008>I suggest that if there are multiple contact 
    addresses for a single AOR, the contact element of each related tuple in 
    PIDF should reflect a unique contact address for this AOR, not the ambiguous 
    AOR itself.</SPAN></FONT></DIV>
    <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN 
    class=276343115-05082008></SPAN></FONT>&nbsp;</DIV>
    <DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN 
    class=276343115-05082008>A unique address is useful, not just as an 
    identifier for the tuple's source, but to reach the address; then, the 
    priority attribute has a meaningful scope.</SPAN></FONT></DIV>
    <DIV><FONT face=Arial color=#0000ff size=2></FONT>&nbsp;</DIV>
    <DIV align=left><SPAN 
    style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century Gothic','sans-serif'"><FONT 
    face=Arial>Colm Smyth</FONT></SPAN></DIV>
    <DIV align=left><SPAN 
    style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century Gothic','sans-serif'"></SPAN><FONT 
    size=1><FONT face=Arial><SPAN 
    style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century Gothic','sans-serif'"><SPAN 
    style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century Gothic','sans-serif'">Lead/Architect 
    - Intelligent Presence Server (IPS)</SPAN> <FONT face=Arial color=#ff0000 
    size=1>|</FONT>&nbsp;<SPAN class=276343115-05082008><FONT face=Arial 
    color=#ff0000 size=1>Unified 
    Communications</FONT></SPAN></SPAN></FONT></FONT><SPAN 
    style="COLOR: black; FONT-FAMILY: 'Times New Roman','serif'"><BR></SPAN><FONT 
    size=1><FONT face=Arial><FONT 
    color=#ff0000><SPAN><STRONG>AVAYA</STRONG>&nbsp;|</SPAN><SPAN 
    style="FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century Gothic','sans-serif'"><FONT 
    face=Arial size=1>&nbsp;</FONT></SPAN></FONT><SPAN 
    style="FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century Gothic','sans-serif'"><A 
    href="mailto:smythc@avaya.com">smythc@avaya.com</A>&nbsp;<FONT face=Arial 
    color=#ff0000 size=1>|</FONT></SPAN><SPAN 
    style="COLOR: black; FONT-FAMILY: 'Times New Roman','serif'">&nbsp;</SPAN><SPAN 
    style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century Gothic','sans-serif'">+353 
    1 656 7843</SPAN><SPAN 
    style="COLOR: black; FONT-FAMILY: 'Times New Roman','serif'"></SPAN> 
    </FONT><FONT face="Century Gothic" 
color=#808080>(x37843)</FONT></FONT></DIV>
    <DIV><FONT face=Arial color=#0000ff size=2></FONT>&nbsp;</DIV><BR>
    <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
    <HR tabIndex=-1>
    <FONT face=Tahoma size=2><B>From:</B> simple-bounces@ietf.org 
    [mailto:simple-bounces@ietf.org] <B>On Behalf Of 
    </B>JaekwonOH<BR><B>Sent:</B> 05 August 2008 02:34<BR><B>To:</B> Simple 
    WG<BR><B>Subject:</B> [Simple] How to show presentity's relative service 
    preference<BR></FONT><BR></DIV>
    <DIV></DIV>
    <DIV><FONT face="Times New Roman" size=2>Hi all,</FONT></DIV>
    <DIV><FONT face="Times New Roman" size=2></FONT>&nbsp;</DIV>
    <DIV><FONT face="Times New Roman" size=2>I'm wondering how a presentity can 
    show his perferred services in presence.<BR>A possibility seems to use the 
    'priority' attribute of &lt;contact&gt; element for this 
    purpose.<BR>However, RFC 3863 defines that the 'priority' attribute shows 
    the presentity's different preference over *contact address*, so it is not 
    clear whether this is good enough to show the presentity's relative service 
    preference. <BR>For example, when there are multiple SIP services that share 
    the presentity's AOR as contact address, then how the different 'priority' 
    attribute value for the same contact address should be interpreted?<BR>IMHO, 
    this happens because a service cannot be represented only with the contact 
    information. Rather, as noted in RFC 4476, a service is identified by the 
    "reach information", which is a set of presence information to reach the 
    service including the contact address.</FONT></DIV>
    <DIV><FONT face="Times New Roman" size=2>If this is the case, what should we 
    do?<BR></DIV></FONT><FONT face="Times New Roman" size=2></FONT>
    <DIV><FONT face="Times New Roman" size=2>Thanks &amp; r</FONT><FONT 
    face="Times New Roman" size=2>egards,</FONT></DIV>
    <DIV><FONT face="Times New Roman" size=2></FONT>&nbsp;</DIV>
    <DIV><FONT face="Times New Roman" size=2>Jaekwon OH</FONT></DIV></BLOCKQUOTE>
  <P>
  <HR>

  <P></P>_______________________________________________<BR>Simple mailing 
  list<BR>Simple@ietf.org<BR>https://www.ietf.org/mailman/listinfo/simple<BR></BLOCKQUOTE></BODY></HTML>

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Cc: Simple WG <simple@ietf.org>
Subject: Re: [Simple] How to show presentity's relative service preference
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JaekwonOH wrote:
> Hi,
>  =

> Thanks for response.
> Even when the device contact URI registered for an AOR is used for =

> tuple's contact address, the uniqueness of the contact address for a =

> tupe seems not guaranteed. For example, a device may run multiple SIP =

> applications, then tuples for each of those would contain the same URI.

Only if it wants them to. It certainly may use a separate contact uri =

for each application. (They probably have the same address and are =

distinguished by the user part, or port.) Its the responsibility of the =

application to put in enough uniqueness to get proper results.

	Paul

> This aspect has already been clarified in RFC 4479 (see the following =

> excerption).
> Therefore, IMHO, the uniquness of contact address for each tuple seem =

> not guaranteed, so the use of 'priority' attribute of <contact> in =

> <tuple> is not enogh to show the presenity's relative service preference.
>  =

>  From RFC 4479 section 3.3.2 reach information,
>  =

> Even for services reachable over a communications network, the URI
> alone may not be sufficient. For example, two applications may be
> running within a cellular telephone, both of which are reachable
> through the user=92s SIP Address of Record. However, one application
> is launched when the INVITE request contains a body of a particular
> type, and the other is launched for other body types. As another
> example, a service may provide complex application logic that
> operates correctly only when contacted from matching application
> software. In such a case, even though the communications between
> instances utilizes a standard protocol (such as SIP), the user
> experience will not be correct unless the applications are matched.
> When the URI is not sufficient, additional attributes of the service
> can be present that define the instructions on how the service is to
> be reached. These attributes must be understood for the service to
> be utilized. If a watcher receives a presence document containing
> reach information it does not understand, it should discard the
> service information.
>  =

>  =

> Thanks & regards,
> Jaekwon OH
> ----- Original Message -----
> =

>     *From:* Smyth, Colm (Colm) <mailto:smythc@avaya.com>
>     *To:* Simple WG <mailto:simple@ietf.org>
>     *Sent:* Wednesday, August 06, 2008 1:23 AM
>     *Subject:* Re: [Simple] How to show presentity's relative service
>     preference
> =

>     I suggest that if there are multiple contact addresses for a single
>     AOR, the contact element of each related tuple in PIDF should
>     reflect a unique contact address for this AOR, not the ambiguous AOR
>     itself.
>      =

>     A unique address is useful, not just as an identifier for the
>     tuple's source, but to reach the address; then, the priority
>     attribute has a meaningful scope.
>      =

>     Colm Smyth
>     Lead/Architect - Intelligent Presence Server (IPS) | Unified
>     Communications
>     *AVAYA* | smythc@avaya.com <mailto:smythc@avaya.com> | +353 1 656
>     7843 (x37843)
>      =

> =

>     ---------------------------------------------------------------------=
---
>     *From:* simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] *On
>     Behalf Of *JaekwonOH
>     *Sent:* 05 August 2008 02:34
>     *To:* Simple WG
>     *Subject:* [Simple] How to show presentity's relative service prefere=
nce
> =

>     Hi all,
>      =

>     I'm wondering how a presentity can show his perferred services in
>     presence.
>     A possibility seems to use the 'priority' attribute of <contact>
>     element for this purpose.
>     However, RFC 3863 defines that the 'priority' attribute shows the
>     presentity's different preference over *contact address*, so it is
>     not clear whether this is good enough to show the presentity's
>     relative service preference.
>     For example, when there are multiple SIP services that share the
>     presentity's AOR as contact address, then how the different
>     'priority' attribute value for the same contact address should be
>     interpreted?
>     IMHO, this happens because a service cannot be represented only with
>     the contact information. Rather, as noted in RFC 4476, a service is
>     identified by the "reach information", which is a set of presence
>     information to reach the service including the contact address.
>     If this is the case, what should we do?
>     Thanks & regards,
>      =

>     Jaekwon OH
> =

>     ---------------------------------------------------------------------=
---
> =

>     _______________________________________________
>     Simple mailing list
>     Simple@ietf.org
>     https://www.ietf.org/mailman/listinfo/simple
> =

> =

> ------------------------------------------------------------------------
> =

> _______________________________________________
> Simple mailing list
> Simple@ietf.org
> https://www.ietf.org/mailman/listinfo/simple
_______________________________________________
Simple mailing list
Simple@ietf.org
https://www.ietf.org/mailman/listinfo/simple


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From: "Smyth, Colm (Colm)" <smythc@avaya.com>
To: "JaekwonOH" <jaekwon.oh@samsung.com>,
	"Simple WG" <simple@ietf.org>
Subject: Re: [Simple] How to show presentity's relative service preference
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You're describing a content-based dispatch scenario; as you note, a
content-oriented application isn't identifiable or addressable using a
URI.
=20
The tuple class-id may help with identification, however there is little
guidance in the existing RFCs on what makes a good class-id. For
content-dispatch over a generic protocol (e.g. SIP or even HTTP), the
actual MIME-type would be useful. For other uses, it would be possible
to use a similar constructive approach to create an identifier that
identifies application in arbitrary levels of detail (e.g.
service/protocol/vendor+version).
=20
All the best,
Colm Smyth
AVAYA | smythc@avaya.com
=20

________________________________

From: JaekwonOH [mailto:jaekwon.oh@samsung.com]=20
Sent: 07 August 2008 06:18
To: Simple WG; Smyth, Colm (Colm)
Subject: Re: [Simple] How to show presentity's relative service
preference


Hi,
=20
Thanks for response.
Even when the device contact URI registered for an AOR is used for
tuple's contact address, the uniqueness of the contact address for a
tupe seems not guaranteed. For example, a device may run multiple SIP
applications, then tuples for each of those would contain the same URI.
This aspect has already been clarified in RFC 4479 (see the following
excerption).
Therefore, IMHO, the uniquness of contact address for each tuple seem
not guaranteed, so the use of 'priority' attribute of <contact> in
<tuple> is not enogh to show the presenity's relative service
preference.
=20
>From RFC 4479 section 3.3.2 reach information,
=20
Even for services reachable over a communications network, the URI
alone may not be sufficient. For example, two applications may be
running within a cellular telephone, both of which are reachable
through the user's SIP Address of Record. However, one application
is launched when the INVITE request contains a body of a particular
type, and the other is launched for other body types. As another
example, a service may provide complex application logic that
operates correctly only when contacted from matching application
software. In such a case, even though the communications between
instances utilizes a standard protocol (such as SIP), the user
experience will not be correct unless the applications are matched.
When the URI is not sufficient, additional attributes of the service
can be present that define the instructions on how the service is to
be reached. These attributes must be understood for the service to
be utilized. If a watcher receives a presence document containing
reach information it does not understand, it should discard the
service information.
=20
=20
Thanks & regards,
Jaekwon OH

----- Original Message -----=20

	From: Smyth, Colm (Colm) <mailto:smythc@avaya.com> =20
	To: Simple WG <mailto:simple@ietf.org> =20
	Sent: Wednesday, August 06, 2008 1:23 AM
	Subject: Re: [Simple] How to show presentity's relative service
preference

	I suggest that if there are multiple contact addresses for a
single AOR, the contact element of each related tuple in PIDF should
reflect a unique contact address for this AOR, not the ambiguous AOR
itself.
	=20
	A unique address is useful, not just as an identifier for the
tuple's source, but to reach the address; then, the priority attribute
has a meaningful scope.
	=20
	Colm Smyth
	Lead/Architect - Intelligent Presence Server (IPS) | Unified
Communications
	AVAYA | smythc@avaya.com | +353 1 656 7843 (x37843)
	=20

________________________________

	From: simple-bounces@ietf.org [mailto:simple-bounces@ietf.org]
On Behalf Of JaekwonOH
	Sent: 05 August 2008 02:34
	To: Simple WG
	Subject: [Simple] How to show presentity's relative service
preference
=09
=09
	Hi all,
	=20
	I'm wondering how a presentity can show his perferred services
in presence.
	A possibility seems to use the 'priority' attribute of <contact>
element for this purpose.
	However, RFC 3863 defines that the 'priority' attribute shows
the presentity's different preference over *contact address*, so it is
not clear whether this is good enough to show the presentity's relative
service preference.=20
	For example, when there are multiple SIP services that share the
presentity's AOR as contact address, then how the different 'priority'
attribute value for the same contact address should be interpreted?
	IMHO, this happens because a service cannot be represented only
with the contact information. Rather, as noted in RFC 4476, a service is
identified by the "reach information", which is a set of presence
information to reach the service including the contact address.
	If this is the case, what should we do?
=09
=09
	Thanks & regards,
	=20
	Jaekwon OH

=09
________________________________


=09

	_______________________________________________
	Simple mailing list
	Simple@ietf.org
	https://www.ietf.org/mailman/listinfo/simple
=09


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charset=3Dus-ascii">
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<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D889393512-07082008>You're describing a content-based dispatch =
scenario; as=20
you note, a content-oriented application isn't identifiable or =
addressable using=20
a URI.</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D889393512-07082008></SPAN></FONT>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D889393512-07082008>The tuple class-id may help with =
identification,=20
however there is little guidance in the existing RFCs on what makes a =
good=20
class-id. </SPAN></FONT><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
class=3D889393512-07082008>For content-dispatch over a generic protocol =
(e.g. SIP=20
or even HTTP), the actual MIME-type would be useful. For other uses, it =
would be=20
possible to use a similar constructive approach to create an identifier =
that=20
identifies application in arbitrary levels of detail (e.g.=20
service/protocol/vendor+version).</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT>&nbsp;</DIV>
<DIV><SPAN class=3D889393512-07082008><FONT face=3DArial color=3D#0000ff =
size=3D2>All=20
the best,</FONT></SPAN></DIV>
<DIV align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
face=3DArial>Colm Smyth</FONT></SPAN><SPAN=20
style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'"><BR></SPAN><FONT=20
size=3D1><FONT face=3DArial><FONT=20
color=3D#ff0000><SPAN><STRONG>AVAYA</STRONG>&nbsp;|</SPAN><SPAN=20
style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
face=3DArial size=3D1>&nbsp;</FONT></SPAN></FONT><SPAN=20
style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><A=20
href=3D"mailto:smythc@avaya.com">smythc@avaya.com</A></SPAN></FONT></FONT=
></DIV>
<DIV>&nbsp;</DIV><BR>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT face=3DTahoma size=3D2><B>From:</B> JaekwonOH =
[mailto:jaekwon.oh@samsung.com]=20
<BR><B>Sent:</B> 07 August 2008 06:18<BR><B>To:</B> Simple WG; Smyth, =
Colm=20
(Colm)<BR><B>Subject:</B> Re: [Simple] How to show presentity's relative =
service=20
preference<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT size=3D2>Hi,</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Thanks for response.</FONT></DIV>
<DIV><FONT size=3D2>Even&nbsp;when&nbsp;the device contact URI =
registered for an=20
AOR&nbsp;is used for tuple's contact address, the uniqueness of the =
contact=20
address for a tupe seems not guaranteed. For example,&nbsp;a device may=20
run&nbsp;multiple SIP applications, then tuples for each of those would =
contain=20
the same URI.</FONT></DIV>
<DIV><FONT size=3D2>This aspect has already been clarified in RFC 4479 =
(see the=20
following excerption).</FONT></DIV>
<DIV>
<DIV><FONT size=3D2>Therefore, IMHO, the uniquness of contact address =
for each=20
tuple seem not guaranteed, so&nbsp;the use of 'priority' attribute of=20
&lt;contact&gt; in &lt;tuple&gt; is not enogh to show the presenity's =
relative=20
service preference.</FONT></DIV></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>From RFC 4479&nbsp;section 3.3.2 reach=20
information,</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Even for services reachable over a communications =
network, the=20
URI<BR>alone may not be sufficient. For example, two applications may=20
be<BR>running within a cellular telephone, both of which are=20
reachable<BR>through the user&#8217;s SIP Address of Record. However, =
one=20
application<BR>is launched when the INVITE request contains a body of a=20
particular<BR>type, and the other is launched for other body types. As=20
another<BR>example, a service may provide complex application logic=20
that<BR>operates correctly only when contacted from matching=20
application<BR>software. In such a case, even though the communications=20
between<BR>instances utilizes a standard protocol (such as SIP), the=20
user<BR>experience will not be correct unless the applications are=20
matched.<BR>When the URI is not sufficient, additional attributes of the =

service<BR>can be present that define the instructions on how the =
service is=20
to<BR>be reached. These attributes must be understood for the service =
to<BR>be=20
utilized. If a watcher receives a presence document containing<BR>reach=20
information it does not understand, it should discard the<BR>service=20
information.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Thanks &amp; regards,</FONT></DIV>
<DIV><FONT size=3D2>Jaekwon OH<BR></FONT></DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt &#44404;&#47548;; font-color: =
black"><B>From:</B> <A=20
  title=3Dsmythc@avaya.com href=3D"mailto:smythc@avaya.com">Smyth, Colm =
(Colm)</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt &#44404;&#47548;"><B>To:</B> <A =
title=3Dsimple@ietf.org=20
  href=3D"mailto:simple@ietf.org">Simple WG</A> </DIV>
  <DIV style=3D"FONT: 10pt &#44404;&#47548;"><B>Sent:</B> Wednesday, =
August 06, 2008 1:23=20
  AM</DIV>
  <DIV style=3D"FONT: 10pt &#44404;&#47548;"><B>Subject:</B> Re: =
[Simple] How to show=20
  presentity's relative service preference</DIV>
  <DIV><BR></DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D276343115-05082008>I suggest that if there are multiple =
contact=20
  addresses for a single AOR, the contact element of each related tuple =
in PIDF=20
  should reflect a unique contact address for this AOR, not the =
ambiguous AOR=20
  itself.</SPAN></FONT></DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D276343115-05082008></SPAN></FONT>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D276343115-05082008>A unique address is useful, not just as an =
identifier=20
  for the tuple's source, but to reach the address; then, the priority =
attribute=20
  has a meaningful scope.</SPAN></FONT></DIV>
  <DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT>&nbsp;</DIV>
  <DIV align=3Dleft><SPAN=20
  style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
  face=3DArial>Colm Smyth</FONT></SPAN></DIV>
  <DIV align=3Dleft><SPAN=20
  style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"></SPAN><FONT=20
  size=3D1><FONT face=3DArial><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'">Lead/Architect=20
  - Intelligent Presence Server (IPS)</SPAN> <FONT face=3DArial =
color=3D#ff0000=20
  size=3D1>|</FONT>&nbsp;<SPAN class=3D276343115-05082008><FONT =
face=3DArial=20
  color=3D#ff0000 size=3D1>Unified=20
  Communications</FONT></SPAN></SPAN></FONT></FONT><SPAN=20
  style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'"><BR></SPAN><FONT=20
  size=3D1><FONT face=3DArial><FONT=20
  color=3D#ff0000><SPAN><STRONG>AVAYA</STRONG>&nbsp;|</SPAN><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
  face=3DArial size=3D1>&nbsp;</FONT></SPAN></FONT><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><A=20
  href=3D"mailto:smythc@avaya.com">smythc@avaya.com</A>&nbsp;<FONT =
face=3DArial=20
  color=3D#ff0000 size=3D1>|</FONT></SPAN><SPAN=20
  style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'">&nbsp;</SPAN><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'">+353=20
  1 656 7843</SPAN><SPAN=20
  style=3D"COLOR: black; FONT-FAMILY: 'Times New Roman','serif'"></SPAN> =

  </FONT><FONT face=3D"Century Gothic" =
color=3D#808080>(x37843)</FONT></FONT></DIV>
  <DIV><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT>&nbsp;</DIV><BR>
  <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
  <HR tabIndex=3D-1>
  <FONT face=3DTahoma size=3D2><B>From:</B> simple-bounces@ietf.org=20
  [mailto:simple-bounces@ietf.org] <B>On Behalf Of =
</B>JaekwonOH<BR><B>Sent:</B>=20
  05 August 2008 02:34<BR><B>To:</B> Simple WG<BR><B>Subject:</B> =
[Simple] How=20
  to show presentity's relative service preference<BR></FONT><BR></DIV>
  <DIV></DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2>Hi all,</FONT></DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2>I'm wondering how a =
presentity can=20
  show his perferred services in presence.<BR>A possibility seems to use =
the=20
  'priority' attribute of &lt;contact&gt; element for this =
purpose.<BR>However,=20
  RFC 3863 defines that the 'priority' attribute shows the presentity's=20
  different preference over *contact address*, so it is not clear =
whether this=20
  is good enough to show the presentity's relative service preference. =
<BR>For=20
  example, when there are multiple SIP services that share the =
presentity's AOR=20
  as contact address, then how the different 'priority' attribute value =
for the=20
  same contact address should be interpreted?<BR>IMHO, this happens =
because a=20
  service cannot be represented only with the contact information. =
Rather, as=20
  noted in RFC 4476, a service is identified by the "reach information", =
which=20
  is a set of presence information to reach the service including the =
contact=20
  address.</FONT></DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2>If this is the case, what =
should we=20
  do?<BR></DIV></FONT><FONT face=3D"Times New Roman" size=3D2></FONT>
  <DIV><FONT face=3D"Times New Roman" size=3D2>Thanks &amp; =
r</FONT><FONT=20
  face=3D"Times New Roman" size=3D2>egards,</FONT></DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3D"Times New Roman" size=3D2>Jaekwon OH</FONT></DIV>
  <P>
  <HR>

  <P></P>_______________________________________________<BR>Simple =
mailing=20
  =
list<BR>Simple@ietf.org<BR>https://www.ietf.org/mailman/listinfo/simple<B=
R></BLOCKQUOTE></BODY></HTML>

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_______________________________________________
Simple mailing list
Simple@ietf.org
https://www.ietf.org/mailman/listinfo/simple

--===============1412238791==--


From simple-bounces@ietf.org  Thu Aug  7 23:38:21 2008
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Date: Fri, 08 Aug 2008 15:38:00 +0900
From: JaekwonOH <jaekwon.oh@samsung.com>
To: Paul Kyzivat <pkyzivat@cisco.com>
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Cc: Simple WG <simple@ietf.org>
Subject: Re: [Simple] How to show presentity's relative service preference
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Thanks for comment.

> Only if it wants them to. It certainly may use a separate contact uri =

> for each application. (They probably have the same address and are =

> distinguished by the user part, or port.) Its the responsibility of the =

> application to put in enough uniqueness to get proper results.

I agree that if all each application can have unique contact address then t=
here's no problem.
However, as I understand relevant RFCs incl. RFC4479, this seems not always=
 the case. =

So, when the contact address is not unique over different applications, it =
is questionable whether the priority attribute can be still meaningful to s=
how presentity's relative service preference...

Thanks & regards,
Jaekwon OH

----- Original Message ----- =

From: "Paul Kyzivat" <pkyzivat@cisco.com>
To: "JaekwonOH" <jaekwon.oh@samsung.com>
Cc: "Simple WG" <simple@ietf.org>; "Smyth, Colm (Colm)" <smythc@avaya.com>
Sent: Thursday, August 07, 2008 8:49 PM
Subject: Re: [Simple] How to show presentity's relative service preference


> =

> =

> JaekwonOH wrote:
>> Hi,
>>  =

>> Thanks for response.
>> Even when the device contact URI registered for an AOR is used for =

>> tuple's contact address, the uniqueness of the contact address for a =

>> tupe seems not guaranteed. For example, a device may run multiple SIP =

>> applications, then tuples for each of those would contain the same URI.
> =

> Only if it wants them to. It certainly may use a separate contact uri =

> for each application. (They probably have the same address and are =

> distinguished by the user part, or port.) Its the responsibility of the =

> application to put in enough uniqueness to get proper results.
> =

> Paul
> =

>> This aspect has already been clarified in RFC 4479 (see the following =

>> excerption).
>> Therefore, IMHO, the uniquness of contact address for each tuple seem =

>> not guaranteed, so the use of 'priority' attribute of <contact> in =

>> <tuple> is not enogh to show the presenity's relative service preference.
>>  =

>>  From RFC 4479 section 3.3.2 reach information,
>>  =

>> Even for services reachable over a communications network, the URI
>> alone may not be sufficient. For example, two applications may be
>> running within a cellular telephone, both of which are reachable
>> through the user=92s SIP Address of Record. However, one application
>> is launched when the INVITE request contains a body of a particular
>> type, and the other is launched for other body types. As another
>> example, a service may provide complex application logic that
>> operates correctly only when contacted from matching application
>> software. In such a case, even though the communications between
>> instances utilizes a standard protocol (such as SIP), the user
>> experience will not be correct unless the applications are matched.
>> When the URI is not sufficient, additional attributes of the service
>> can be present that define the instructions on how the service is to
>> be reached. These attributes must be understood for the service to
>> be utilized. If a watcher receives a presence document containing
>> reach information it does not understand, it should discard the
>> service information.
>>  =

>>  =

>> Thanks & regards,
>> Jaekwon OH
>> ----- Original Message -----
>> =

>>     *From:* Smyth, Colm (Colm) <mailto:smythc@avaya.com>
>>     *To:* Simple WG <mailto:simple@ietf.org>
>>     *Sent:* Wednesday, August 06, 2008 1:23 AM
>>     *Subject:* Re: [Simple] How to show presentity's relative service
>>     preference
>> =

>>     I suggest that if there are multiple contact addresses for a single
>>     AOR, the contact element of each related tuple in PIDF should
>>     reflect a unique contact address for this AOR, not the ambiguous AOR
>>     itself.
>>      =

>>     A unique address is useful, not just as an identifier for the
>>     tuple's source, but to reach the address; then, the priority
>>     attribute has a meaningful scope.
>>      =

>>     Colm Smyth
>>     Lead/Architect - Intelligent Presence Server (IPS) | Unified
>>     Communications
>>     *AVAYA* | smythc@avaya.com <mailto:smythc@avaya.com> | +353 1 656
>>     7843 (x37843)
>>      =

>> =

>>     --------------------------------------------------------------------=
----
>>     *From:* simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] *On
>>     Behalf Of *JaekwonOH
>>     *Sent:* 05 August 2008 02:34
>>     *To:* Simple WG
>>     *Subject:* [Simple] How to show presentity's relative service prefer=
ence
>> =

>>     Hi all,
>>      =

>>     I'm wondering how a presentity can show his perferred services in
>>     presence.
>>     A possibility seems to use the 'priority' attribute of <contact>
>>     element for this purpose.
>>     However, RFC 3863 defines that the 'priority' attribute shows the
>>     presentity's different preference over *contact address*, so it is
>>     not clear whether this is good enough to show the presentity's
>>     relative service preference.
>>     For example, when there are multiple SIP services that share the
>>     presentity's AOR as contact address, then how the different
>>     'priority' attribute value for the same contact address should be
>>     interpreted?
>>     IMHO, this happens because a service cannot be represented only with
>>     the contact information. Rather, as noted in RFC 4476, a service is
>>     identified by the "reach information", which is a set of presence
>>     information to reach the service including the contact address.
>>     If this is the case, what should we do?
>>     Thanks & regards,
>>      =

>>     Jaekwon OH
>> =

>>     --------------------------------------------------------------------=
----
>> =

>>     _______________________________________________
>>     Simple mailing list
>>     Simple@ietf.org
>>     https://www.ietf.org/mailman/listinfo/simple
>> =

>> =

>> ------------------------------------------------------------------------
>> =

>> _______________________________________________
>> Simple mailing list
>> Simple@ietf.org
>> https://www.ietf.org/mailman/listinfo/simple
_______________________________________________
Simple mailing list
Simple@ietf.org
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Date: Fri, 08 Aug 2008 15:39:12 +0900
From: JaekwonOH <jaekwon.oh@samsung.com>
To: Simple WG <simple@ietf.org>, "Smyth, Colm (Colm)" <smythc@avaya.com>
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Subject: Re: [Simple] How to show presentity's relative service preference
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It seems we now share the understanding that a service may not be uniquely identifiable with the contact URI only. 
Then, the question is whether the priority attribute is still meaningful to show presentity's relative service preference..

Thanks & regards,
Jaekwon OH

  ----- Original Message ----- 
  From: Smyth, Colm (Colm) 
  To: JaekwonOH ; Simple WG 
  Sent: Thursday, August 07, 2008 10:22 PM
  Subject: RE: [Simple] How to show presentity's relative service preference


  You're describing a content-based dispatch scenario; as you note, a content-oriented application isn't identifiable or addressable using a URI.

  The tuple class-id may help with identification, however there is little guidance in the existing RFCs on what makes a good class-id. For content-dispatch over a generic protocol (e.g. SIP or even HTTP), the actual MIME-type would be useful. For other uses, it would be possible to use a similar constructive approach to create an identifier that identifies application in arbitrary levels of detail (e.g. service/protocol/vendor+version).

  All the best,
  Colm Smyth
  AVAYA | smythc@avaya.com




------------------------------------------------------------------------------
  From: JaekwonOH [mailto:jaekwon.oh@samsung.com] 
  Sent: 07 August 2008 06:18
  To: Simple WG; Smyth, Colm (Colm)
  Subject: Re: [Simple] How to show presentity's relative service preference


  Hi,

  Thanks for response.
  Even when the device contact URI registered for an AOR is used for tuple's contact address, the uniqueness of the contact address for a tupe seems not guaranteed. For example, a device may run multiple SIP applications, then tuples for each of those would contain the same URI.
  This aspect has already been clarified in RFC 4479 (see the following excerption).
  Therefore, IMHO, the uniquness of contact address for each tuple seem not guaranteed, so the use of 'priority' attribute of <contact> in <tuple> is not enogh to show the presenity's relative service preference.

  From RFC 4479 section 3.3.2 reach information,

  Even for services reachable over a communications network, the URI
  alone may not be sufficient. For example, two applications may be
  running within a cellular telephone, both of which are reachable
  through the user's SIP Address of Record. However, one application
  is launched when the INVITE request contains a body of a particular
  type, and the other is launched for other body types. As another
  example, a service may provide complex application logic that
  operates correctly only when contacted from matching application
  software. In such a case, even though the communications between
  instances utilizes a standard protocol (such as SIP), the user
  experience will not be correct unless the applications are matched.
  When the URI is not sufficient, additional attributes of the service
  can be present that define the instructions on how the service is to
  be reached. These attributes must be understood for the service to
  be utilized. If a watcher receives a presence document containing
  reach information it does not understand, it should discard the
  service information.


  Thanks & regards,
  Jaekwon OH

  ----- Original Message ----- 
    From: Smyth, Colm (Colm) 
    To: Simple WG 
    Sent: Wednesday, August 06, 2008 1:23 AM
    Subject: Re: [Simple] How to show presentity's relative service preference


    I suggest that if there are multiple contact addresses for a single AOR, the contact element of each related tuple in PIDF should reflect a unique contact address for this AOR, not the ambiguous AOR itself.

    A unique address is useful, not just as an identifier for the tuple's source, but to reach the address; then, the priority attribute has a meaningful scope.

    Colm Smyth
    Lead/Architect - Intelligent Presence Server (IPS) | Unified Communications
    AVAYA | smythc@avaya.com | +353 1 656 7843 (x37843)




----------------------------------------------------------------------------
    From: simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] On Behalf Of JaekwonOH
    Sent: 05 August 2008 02:34
    To: Simple WG
    Subject: [Simple] How to show presentity's relative service preference


    Hi all,

    I'm wondering how a presentity can show his perferred services in presence.
    A possibility seems to use the 'priority' attribute of <contact> element for this purpose.
    However, RFC 3863 defines that the 'priority' attribute shows the presentity's different preference over *contact address*, so it is not clear whether this is good enough to show the presentity's relative service preference. 
    For example, when there are multiple SIP services that share the presentity's AOR as contact address, then how the different 'priority' attribute value for the same contact address should be interpreted?
    IMHO, this happens because a service cannot be represented only with the contact information. Rather, as noted in RFC 4476, a service is identified by the "reach information", which is a set of presence information to reach the service including the contact address.
    If this is the case, what should we do?

    Thanks & regards,

    Jaekwon OH


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From simple-bounces@ietf.org  Fri Aug  8 03:01:12 2008
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Thread-Topic: [Simple] How to show presentity's relative service preference
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From: "Smyth, Colm (Colm)" <smythc@avaya.com>
To: "JaekwonOH" <jaekwon.oh@samsung.com>,
	"Simple WG" <simple@ietf.org>
Subject: Re: [Simple] How to show presentity's relative service preference
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Your scenario falls outside the scope of the present RFCs. Let's review
the relevant extracts.
=20
RFC 3863 says:
     - Relative priority: numerical value specifying the priority
         of this COMMUNICATION ADDRESS. (optional)
and:
   The <contact> element contains a URL of the contact address.  It
   optionally has a 'priority' attribute, whose value means a relative
   priority of this contact address over the others.  The value of the
   attribute MUST be a decimal number between 0 and 1 inclusive with at
   most 3 digits after the decimal point.  Higher values indicate higher
   priority.  Examples of priority values are 0, 0.021, 0.5, 1.00. If
   the 'priority' attribute is omitted, applications MUST assign the
   contact address the lowest priority.  If the 'priority' value is out
   of the range, applications just SHOULD ignore the value and process
   it as if the attribute was not present.

   Applications SHOULD handle contacts with a higher priority as they
   have precedence over those with lower priorities.  How they are
   actually treated is beyond this specification.  Also, how to handle
   contacts with the same priority is up to implementations.
So the priority is intended to be used in combination with the contact
addresss.
=20
RFC 4479 says:
   Each service is also associated with a priority, which represents the
   preference that the user has for usage of one service over another.
   This does not mean that, when a watcher wishes to communicate with
   the presentity, that they should always use the service with the
   highest priority.  If that were the case, there would be no point in
   including multiple services in the presence document.  Rather, the
   priority says, "If you, the watcher, cannot decide which of these to
   use, or if it is not important to you, this is the order in which I
   would like you to contact me.  However, I am giving you a choice."
   The priorities are relative to each other, and have no meaning as
   absolute numbers.  If there are two services, and they have
   priorities of 1 and .5, respectively, this is identical to giving
   them priorities of .2 and .1, respectively.
However clearly there is a benefit in providing presence information for
multiple services, because the subscriber may have a preference for
using a specific address type and so regardless they may need to treat
the priority as advisory information only.
=20
=20
In spite of this address-centric view of priority, I see no reason why a
smart subscriber should not use all the information in the tuple (in
particular, the class-id) to decide how best to address a presentity via
a service, and then the priority does have meaning.
=20
I see some benefit in a new RFC (or an update to RFC 4479) that
clarifies this usage of priority, and that offers guidelines for
class-ids, and possibly a way to communicate the mime-types supported by
a given service. I'd also like to see a taxonomy of standard presence
substates (e.g. do-not-disturb) and a recommendation on which substates
are associated with open versus closed states.
=20
I'd be interested in collaborating on any subset of these initiatives
off-line and presenting some input to the WG. If anyone else is
interested, please contact me directly. Jaekwon, given your insights in
this thread, I hope you would consider contributing directly.
=20
All the best,
Colm Smyth
AVAYA | smythc@avaya.com=20
=20

________________________________

From: JaekwonOH [mailto:jaekwon.oh@samsung.com]=20
Sent: 08 August 2008 07:39
To: Simple WG; Smyth, Colm (Colm)
Subject: Re: [Simple] How to show presentity's relative service
preference


It seems we now share the understanding that a service may not be
uniquely identifiable with the contact URI only.=20
Then, the question is whether the priority attribute is still meaningful
to show presentity's relative service preference..
=20
Thanks & regards,
Jaekwon OH


	----- Original Message -----=20
	From: Smyth, Colm (Colm) <mailto:smythc@avaya.com> =20
	To: JaekwonOH <mailto:jaekwon.oh@samsung.com>  ; Simple WG
<mailto:simple@ietf.org> =20
	Sent: Thursday, August 07, 2008 10:22 PM
	Subject: RE: [Simple] How to show presentity's relative service
preference

	You're describing a content-based dispatch scenario; as you
note, a content-oriented application isn't identifiable or addressable
using a URI.
	=20
	The tuple class-id may help with identification, however there
is little guidance in the existing RFCs on what makes a good class-id.
For content-dispatch over a generic protocol (e.g. SIP or even HTTP),
the actual MIME-type would be useful. For other uses, it would be
possible to use a similar constructive approach to create an identifier
that identifies application in arbitrary levels of detail (e.g.
service/protocol/vendor+version).
	=20
	All the best,
	Colm Smyth
	AVAYA | smythc@avaya.com
	=20

________________________________

	From: JaekwonOH [mailto:jaekwon.oh@samsung.com]=20
	Sent: 07 August 2008 06:18
	To: Simple WG; Smyth, Colm (Colm)
	Subject: Re: [Simple] How to show presentity's relative service
preference
=09
=09
	Hi,
	=20
	Thanks for response.
	Even when the device contact URI registered for an AOR is used
for tuple's contact address, the uniqueness of the contact address for a
tupe seems not guaranteed. For example, a device may run multiple SIP
applications, then tuples for each of those would contain the same URI.
	This aspect has already been clarified in RFC 4479 (see the
following excerption).
	Therefore, IMHO, the uniquness of contact address for each tuple
seem not guaranteed, so the use of 'priority' attribute of <contact> in
<tuple> is not enogh to show the presenity's relative service
preference.
	=20
	From RFC 4479 section 3.3.2 reach information,
	=20
	Even for services reachable over a communications network, the
URI
	alone may not be sufficient. For example, two applications may
be
	running within a cellular telephone, both of which are reachable
	through the user's SIP Address of Record. However, one
application
	is launched when the INVITE request contains a body of a
particular
	type, and the other is launched for other body types. As another
	example, a service may provide complex application logic that
	operates correctly only when contacted from matching application
	software. In such a case, even though the communications between
	instances utilizes a standard protocol (such as SIP), the user
	experience will not be correct unless the applications are
matched.
	When the URI is not sufficient, additional attributes of the
service
	can be present that define the instructions on how the service
is to
	be reached. These attributes must be understood for the service
to
	be utilized. If a watcher receives a presence document
containing
	reach information it does not understand, it should discard the
	service information.
	=20
	=20
	Thanks & regards,
	Jaekwon OH
=09
	----- Original Message -----=20

		From: Smyth, Colm (Colm) <mailto:smythc@avaya.com> =20
		To: Simple WG <mailto:simple@ietf.org> =20
		Sent: Wednesday, August 06, 2008 1:23 AM
		Subject: Re: [Simple] How to show presentity's relative
service preference

		I suggest that if there are multiple contact addresses
for a single AOR, the contact element of each related tuple in PIDF
should reflect a unique contact address for this AOR, not the ambiguous
AOR itself.
		=20
		A unique address is useful, not just as an identifier
for the tuple's source, but to reach the address; then, the priority
attribute has a meaningful scope.
		=20
		Colm Smyth
		Lead/Architect - Intelligent Presence Server (IPS) |
Unified Communications
		AVAYA | smythc@avaya.com | +353 1 656 7843 (x37843)
		=20

________________________________

		From: simple-bounces@ietf.org
[mailto:simple-bounces@ietf.org] On Behalf Of JaekwonOH
		Sent: 05 August 2008 02:34
		To: Simple WG
		Subject: [Simple] How to show presentity's relative
service preference
	=09
	=09
		Hi all,
		=20
		I'm wondering how a presentity can show his perferred
services in presence.
		A possibility seems to use the 'priority' attribute of
<contact> element for this purpose.
		However, RFC 3863 defines that the 'priority' attribute
shows the presentity's different preference over *contact address*, so
it is not clear whether this is good enough to show the presentity's
relative service preference.=20
		For example, when there are multiple SIP services that
share the presentity's AOR as contact address, then how the different
'priority' attribute value for the same contact address should be
interpreted?
		IMHO, this happens because a service cannot be
represented only with the contact information. Rather, as noted in RFC
4476, a service is identified by the "reach information", which is a set
of presence information to reach the service including the contact
address.
		If this is the case, what should we do?
	=09
	=09
		Thanks & regards,
		=20
		Jaekwon OH

	=09
________________________________


	=09

		_______________________________________________
		Simple mailing list
		Simple@ietf.org
		https://www.ietf.org/mailman/listinfo/simple
	=09


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<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>Your scenario falls outside the scope of the =
present RFCs.=20
</FONT></SPAN><SPAN class=3D813334109-08082008><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>Let's review the relevant extracts.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>RFC 3863 says:</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><PRE>     - =
Relative priority: numerical value specifying the priority
         of this COMMUNICATION ADDRESS. (optional)</PRE></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>and:</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><PRE>   The =
&lt;contact&gt; element contains a URL of the contact address.  It
   optionally has a 'priority' attribute, whose value means a relative
   priority of this contact address over the others.  The value of the
   attribute MUST be a decimal number between 0 and 1 inclusive with at
   most 3 digits after the decimal point.  Higher values indicate higher
   priority.  Examples of priority values are 0, 0.021, 0.5, 1.00. If
   the 'priority' attribute is omitted, applications MUST assign the
   contact address the lowest priority.  If the 'priority' value is out
   of the range, applications just SHOULD ignore the value and process
   it as if the attribute was not present.

   Applications SHOULD handle contacts with a higher priority as they
   have precedence over those with lower priorities.  How they are
   actually treated is beyond this specification.  Also, how to handle
   contacts with the same priority is up to =
implementations.</SPAN></PRE></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>So the priority is intended to be used in =
combination with=20
the contact addresss.</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><FONT =
face=3DArial=20
color=3D#0000ff size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><FONT =
face=3DArial=20
color=3D#0000ff size=3D2>RFC 4479 says:</FONT></SPAN></DIV>
<DIV dir=3Dltr align=3Dleft><SPAN class=3D813334109-08082008><PRE>   =
Each service is also associated with a priority, which represents the
   preference that the user has for usage of one service over another.
   This does not mean that, when a watcher wishes to communicate with
   the presentity, that they should always use the service with the
   highest priority.  If that were the case, there would be no point in
   including multiple services in the presence document.  Rather, the
   priority says, "If you, the watcher, cannot decide which of these to
   use, or if it is not important to you, this is the order in which I
   would like you to contact me.  However, I am giving you a choice."
   The priorities are relative to each other, and have no meaning as
   absolute numbers.  If there are two services, and they have
   priorities of 1 and .5, respectively, this is identical to giving
   them priorities of .2 and .1, respectively.</PRE></SPAN></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D813334109-08082008>However clearly there is a benefit in =
providing=20
presence information for multiple services, because the subscriber may =
have a=20
preference for using a specific address type and so regardless they may =
need to=20
treat the priority as advisory information only.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D813334109-08082008></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D813334109-08082008></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D813334109-08082008>In=20
spite of this address-centric view of priority, I see no reason why a =
smart=20
subscriber should not use all the information in the tuple (in =
particular, the=20
class-id) to decide how best to address a presentity via a service, and =
then the=20
priority does have meaning.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D813334109-08082008></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D813334109-08082008>I see=20
some benefit in a new RFC (or an update to RFC 4479) that clarifies this =
usage=20
of priority, and that offers guidelines for class-ids, and possibly a =
way to=20
communicate the mime-types supported by a given service. I'd also like =
to see a=20
taxonomy of standard presence substates (e.g. do-not-disturb) and a=20
recommendation on which substates are associated with open versus closed =

states.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D813334109-08082008></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D813334109-08082008>I'd be=20
interested in collaborating on any subset of these initiatives off-line =
and=20
presenting some input to the WG. If anyone else is interested, please =
contact me=20
directly. Jaekwon, given your insights in this thread, I hope you would =
consider=20
contributing directly.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D813334109-08082008></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D813334109-08082008>All=20
the best,</SPAN></FONT></DIV>
<DIV align=3Dleft><SPAN=20
style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
face=3DArial>Colm Smyth</FONT></SPAN></DIV>
<DIV align=3Dleft><FONT size=3D1><FONT face=3DArial><FONT=20
color=3D#ff0000><SPAN><STRONG>AVAYA</STRONG>&nbsp;|</SPAN><SPAN=20
style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
face=3DArial size=3D1>&nbsp;</FONT></SPAN></FONT><SPAN=20
style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><A=20
href=3D"mailto:smythc@avaya.com">smythc@avaya.com</A>&nbsp;</SPAN></FONT>=
</FONT></DIV>
<DIV>&nbsp;</DIV><BR>
<DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT face=3DTahoma size=3D2><B>From:</B> JaekwonOH =
[mailto:jaekwon.oh@samsung.com]=20
<BR><B>Sent:</B> 08 August 2008 07:39<BR><B>To:</B> Simple WG; Smyth, =
Colm=20
(Colm)<BR><B>Subject:</B> Re: [Simple] How to show presentity's relative =
service=20
preference<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT size=3D2>It </FONT><FONT size=3D2>seems we now&nbsp;share the =

understanding that a service may not be uniquely identifiable with the =
contact=20
URI only. </FONT></DIV>
<DIV><FONT size=3D2>Then,&nbsp;the question is whether the priority =
attribute is=20
still meaningful to show presentity's relative service =
preference..</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Thanks &amp; regards,</FONT></DIV>
<DIV><FONT size=3D2>Jaekwon OH<BR></FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt &#44404;&#47548;">----- Original Message =
----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt &#44404;&#47548;; font-color: =
black"><B>From:</B> <A=20
  title=3Dsmythc@avaya.com href=3D"mailto:smythc@avaya.com">Smyth, Colm =
(Colm)</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt &#44404;&#47548;"><B>To:</B> <A =
title=3Djaekwon.oh@samsung.com=20
  href=3D"mailto:jaekwon.oh@samsung.com">JaekwonOH</A> ; <A =
title=3Dsimple@ietf.org=20
  href=3D"mailto:simple@ietf.org">Simple WG</A> </DIV>
  <DIV style=3D"FONT: 10pt &#44404;&#47548;"><B>Sent:</B> Thursday, =
August 07, 2008 10:22=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt &#44404;&#47548;"><B>Subject:</B> RE: =
[Simple] How to show=20
  presentity's relative service preference</DIV>
  <DIV><BR></DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D889393512-07082008>You're describing a content-based dispatch =
scenario;=20
  as you note, a content-oriented application isn't identifiable or =
addressable=20
  using a URI.</SPAN></FONT></DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D889393512-07082008></SPAN></FONT>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D889393512-07082008>The tuple class-id may help with =
identification,=20
  however there is little guidance in the existing RFCs on what makes a =
good=20
  class-id. </SPAN></FONT><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D889393512-07082008>For content-dispatch over a generic =
protocol (e.g.=20
  SIP or even HTTP), the actual MIME-type would be useful. For other =
uses, it=20
  would be possible to use a similar constructive approach to create an=20
  identifier that identifies application in arbitrary levels of detail =
(e.g.=20
  service/protocol/vendor+version).</SPAN></FONT></DIV>
  <DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT>&nbsp;</DIV>
  <DIV><SPAN class=3D889393512-07082008><FONT face=3DArial =
color=3D#0000ff size=3D2>All=20
  the best,</FONT></SPAN></DIV>
  <DIV align=3Dleft><SPAN=20
  style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
  face=3DArial>Colm Smyth</FONT></SPAN><SPAN=20
  style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'"><BR></SPAN><FONT=20
  size=3D1><FONT face=3DArial><FONT=20
  color=3D#ff0000><SPAN><STRONG>AVAYA</STRONG>&nbsp;|</SPAN><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
  face=3DArial size=3D1>&nbsp;</FONT></SPAN></FONT><SPAN=20
  style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><A=20
  =
href=3D"mailto:smythc@avaya.com">smythc@avaya.com</A></SPAN></FONT></FONT=
></DIV>
  <DIV>&nbsp;</DIV><BR>
  <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
  <HR tabIndex=3D-1>
  <FONT face=3DTahoma size=3D2><B>From:</B> JaekwonOH=20
  [mailto:jaekwon.oh@samsung.com] <BR><B>Sent:</B> 07 August 2008=20
  06:18<BR><B>To:</B> Simple WG; Smyth, Colm (Colm)<BR><B>Subject:</B> =
Re:=20
  [Simple] How to show presentity's relative service=20
  preference<BR></FONT><BR></DIV>
  <DIV></DIV>
  <DIV><FONT size=3D2>Hi,</FONT></DIV>
  <DIV><FONT size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT size=3D2>Thanks for response.</FONT></DIV>
  <DIV><FONT size=3D2>Even&nbsp;when&nbsp;the device contact URI =
registered for an=20
  AOR&nbsp;is used for tuple's contact address, the uniqueness of the =
contact=20
  address for a tupe seems not guaranteed. For example,&nbsp;a device =
may=20
  run&nbsp;multiple SIP applications, then tuples for each of those =
would=20
  contain the same URI.</FONT></DIV>
  <DIV><FONT size=3D2>This aspect has already been clarified in RFC 4479 =
(see the=20
  following excerption).</FONT></DIV>
  <DIV>
  <DIV><FONT size=3D2>Therefore, IMHO, the uniquness of contact address =
for each=20
  tuple seem not guaranteed, so&nbsp;the use of 'priority' attribute of=20
  &lt;contact&gt; in &lt;tuple&gt; is not enogh to show the presenity's =
relative=20
  service preference.</FONT></DIV></DIV>
  <DIV><FONT size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT size=3D2>From RFC 4479&nbsp;section 3.3.2 reach=20
  information,</FONT></DIV>
  <DIV><FONT size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT size=3D2>Even for services reachable over a communications =
network,=20
  the URI<BR>alone may not be sufficient. For example, two applications =
may=20
  be<BR>running within a cellular telephone, both of which are=20
  reachable<BR>through the user&#8217;s SIP Address of Record. However, =
one=20
  application<BR>is launched when the INVITE request contains a body of =
a=20
  particular<BR>type, and the other is launched for other body types. As =

  another<BR>example, a service may provide complex application logic=20
  that<BR>operates correctly only when contacted from matching=20
  application<BR>software. In such a case, even though the =
communications=20
  between<BR>instances utilizes a standard protocol (such as SIP), the=20
  user<BR>experience will not be correct unless the applications are=20
  matched.<BR>When the URI is not sufficient, additional attributes of =
the=20
  service<BR>can be present that define the instructions on how the =
service is=20
  to<BR>be reached. These attributes must be understood for the service =
to<BR>be=20
  utilized. If a watcher receives a presence document =
containing<BR>reach=20
  information it does not understand, it should discard the<BR>service=20
  information.</FONT></DIV>
  <DIV><FONT size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT size=3D2>Thanks &amp; regards,</FONT></DIV>
  <DIV><FONT size=3D2>Jaekwon OH<BR></FONT></DIV>
  <DIV>----- Original Message ----- </DIV>
  <BLOCKQUOTE=20
  style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
    <DIV=20
    style=3D"BACKGROUND: #e4e4e4; FONT: 10pt &#44404;&#47548;; =
font-color: black"><B>From:</B>=20
    <A title=3Dsmythc@avaya.com href=3D"mailto:smythc@avaya.com">Smyth, =
Colm=20
    (Colm)</A> </DIV>
    <DIV style=3D"FONT: 10pt &#44404;&#47548;"><B>To:</B> <A =
title=3Dsimple@ietf.org=20
    href=3D"mailto:simple@ietf.org">Simple WG</A> </DIV>
    <DIV style=3D"FONT: 10pt &#44404;&#47548;"><B>Sent:</B> Wednesday, =
August 06, 2008 1:23=20
    AM</DIV>
    <DIV style=3D"FONT: 10pt &#44404;&#47548;"><B>Subject:</B> Re: =
[Simple] How to show=20
    presentity's relative service preference</DIV>
    <DIV><BR></DIV>
    <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
    class=3D276343115-05082008>I suggest that if there are multiple =
contact=20
    addresses for a single AOR, the contact element of each related =
tuple in=20
    PIDF should reflect a unique contact address for this AOR, not the =
ambiguous=20
    AOR itself.</SPAN></FONT></DIV>
    <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
    class=3D276343115-05082008></SPAN></FONT>&nbsp;</DIV>
    <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
    class=3D276343115-05082008>A unique address is useful, not just as =
an=20
    identifier for the tuple's source, but to reach the address; then, =
the=20
    priority attribute has a meaningful scope.</SPAN></FONT></DIV>
    <DIV><FONT face=3DArial color=3D#0000ff size=3D2></FONT>&nbsp;</DIV>
    <DIV align=3Dleft><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
    face=3DArial>Colm Smyth</FONT></SPAN></DIV>
    <DIV align=3Dleft><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"></SPAN><FONT=20
    size=3D1><FONT face=3DArial><SPAN=20
    style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><SPAN=20
    style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'">Lead/Architect=20
    - Intelligent Presence Server (IPS)</SPAN> <FONT face=3DArial =
color=3D#ff0000=20
    size=3D1>|</FONT>&nbsp;<SPAN class=3D276343115-05082008><FONT =
face=3DArial=20
    color=3D#ff0000 size=3D1>Unified=20
    Communications</FONT></SPAN></SPAN></FONT></FONT><SPAN=20
    style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'"><BR></SPAN><FONT=20
    size=3D1><FONT face=3DArial><FONT=20
    color=3D#ff0000><SPAN><STRONG>AVAYA</STRONG>&nbsp;|</SPAN><SPAN=20
    style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><FONT=20
    face=3DArial size=3D1>&nbsp;</FONT></SPAN></FONT><SPAN=20
    style=3D"FONT-SIZE: 7.5pt; COLOR: green; FONT-FAMILY: 'Century =
Gothic','sans-serif'"><A=20
    href=3D"mailto:smythc@avaya.com">smythc@avaya.com</A>&nbsp;<FONT =
face=3DArial=20
    color=3D#ff0000 size=3D1>|</FONT></SPAN><SPAN=20
    style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'">&nbsp;</SPAN><SPAN=20
    style=3D"FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: 'Century =
Gothic','sans-serif'">+353=20
    1 656 7843</SPAN><SPAN=20
    style=3D"COLOR: black; FONT-FAMILY: 'Times New =
Roman','serif'"></SPAN>=20
    </FONT><FONT face=3D"Century Gothic"=20
color=3D#808080>(x37843)</FONT></FONT></DIV>
    <DIV><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT>&nbsp;</DIV><BR>
    <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr =
align=3Dleft>
    <HR tabIndex=3D-1>
    <FONT face=3DTahoma size=3D2><B>From:</B> simple-bounces@ietf.org=20
    [mailto:simple-bounces@ietf.org] <B>On Behalf Of=20
    </B>JaekwonOH<BR><B>Sent:</B> 05 August 2008 02:34<BR><B>To:</B> =
Simple=20
    WG<BR><B>Subject:</B> [Simple] How to show presentity's relative =
service=20
    preference<BR></FONT><BR></DIV>
    <DIV></DIV>
    <DIV><FONT face=3D"Times New Roman" size=3D2>Hi all,</FONT></DIV>
    <DIV><FONT face=3D"Times New Roman" size=3D2></FONT>&nbsp;</DIV>
    <DIV><FONT face=3D"Times New Roman" size=3D2>I'm wondering how a =
presentity can=20
    show his perferred services in presence.<BR>A possibility seems to =
use the=20
    'priority' attribute of &lt;contact&gt; element for this=20
    purpose.<BR>However, RFC 3863 defines that the 'priority' attribute =
shows=20
    the presentity's different preference over *contact address*, so it =
is not=20
    clear whether this is good enough to show the presentity's relative =
service=20
    preference. <BR>For example, when there are multiple SIP services =
that share=20
    the presentity's AOR as contact address, then how the different =
'priority'=20
    attribute value for the same contact address should be =
interpreted?<BR>IMHO,=20
    this happens because a service cannot be represented only with the =
contact=20
    information. Rather, as noted in RFC 4476, a service is identified =
by the=20
    "reach information", which is a set of presence information to reach =
the=20
    service including the contact address.</FONT></DIV>
    <DIV><FONT face=3D"Times New Roman" size=3D2>If this is the case, =
what should we=20
    do?<BR></DIV></FONT><FONT face=3D"Times New Roman" size=3D2></FONT>
    <DIV><FONT face=3D"Times New Roman" size=3D2>Thanks &amp; =
r</FONT><FONT=20
    face=3D"Times New Roman" size=3D2>egards,</FONT></DIV>
    <DIV><FONT face=3D"Times New Roman" size=3D2></FONT>&nbsp;</DIV>
    <DIV><FONT face=3D"Times New Roman" size=3D2>Jaekwon OH</FONT></DIV>
    <P>
    <HR>

    <P></P>_______________________________________________<BR>Simple =
mailing=20
    =
list<BR>Simple@ietf.org<BR>https://www.ietf.org/mailman/listinfo/simple<B=
R></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>

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Cc: Simple WG <simple@ietf.org>
Subject: Re: [Simple] How to show presentity's relative service preference
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JaekwonOH wrote:
> Thanks for comment.
> =

>> Only if it wants them to. It certainly may use a separate contact uri =

>> for each application. (They probably have the same address and are =

>> distinguished by the user part, or port.) Its the responsibility of the =

>> application to put in enough uniqueness to get proper results.
> =

> I agree that if all each application can have unique contact address then=
 there's no problem.
> However, as I understand relevant RFCs incl. RFC4479, this seems not alwa=
ys the case. =


What would lead you to think you can't have as many unique addresses as =

you want?

> So, when the contact address is not unique over different applications, i=
t is questionable whether the priority attribute can be still meaningful to=
 show presentity's relative service preference...
> =

> Thanks & regards,
> Jaekwon OH
> =

> ----- Original Message ----- =

> From: "Paul Kyzivat" <pkyzivat@cisco.com>
> To: "JaekwonOH" <jaekwon.oh@samsung.com>
> Cc: "Simple WG" <simple@ietf.org>; "Smyth, Colm (Colm)" <smythc@avaya.com>
> Sent: Thursday, August 07, 2008 8:49 PM
> Subject: Re: [Simple] How to show presentity's relative service preference
> =

> =

>>
>> JaekwonOH wrote:
>>> Hi,
>>>  =

>>> Thanks for response.
>>> Even when the device contact URI registered for an AOR is used for =

>>> tuple's contact address, the uniqueness of the contact address for a =

>>> tupe seems not guaranteed. For example, a device may run multiple SIP =

>>> applications, then tuples for each of those would contain the same URI.
>> Only if it wants them to. It certainly may use a separate contact uri =

>> for each application. (They probably have the same address and are =

>> distinguished by the user part, or port.) Its the responsibility of the =

>> application to put in enough uniqueness to get proper results.
>>
>> Paul
>>
>>> This aspect has already been clarified in RFC 4479 (see the following =

>>> excerption).
>>> Therefore, IMHO, the uniquness of contact address for each tuple seem =

>>> not guaranteed, so the use of 'priority' attribute of <contact> in =

>>> <tuple> is not enogh to show the presenity's relative service preferenc=
e.
>>>  =

>>>  From RFC 4479 section 3.3.2 reach information,
>>>  =

>>> Even for services reachable over a communications network, the URI
>>> alone may not be sufficient. For example, two applications may be
>>> running within a cellular telephone, both of which are reachable
>>> through the user=92s SIP Address of Record. However, one application
>>> is launched when the INVITE request contains a body of a particular
>>> type, and the other is launched for other body types. As another
>>> example, a service may provide complex application logic that
>>> operates correctly only when contacted from matching application
>>> software. In such a case, even though the communications between
>>> instances utilizes a standard protocol (such as SIP), the user
>>> experience will not be correct unless the applications are matched.
>>> When the URI is not sufficient, additional attributes of the service
>>> can be present that define the instructions on how the service is to
>>> be reached. These attributes must be understood for the service to
>>> be utilized. If a watcher receives a presence document containing
>>> reach information it does not understand, it should discard the
>>> service information.
>>>  =

>>>  =

>>> Thanks & regards,
>>> Jaekwon OH
>>> ----- Original Message -----
>>>
>>>     *From:* Smyth, Colm (Colm) <mailto:smythc@avaya.com>
>>>     *To:* Simple WG <mailto:simple@ietf.org>
>>>     *Sent:* Wednesday, August 06, 2008 1:23 AM
>>>     *Subject:* Re: [Simple] How to show presentity's relative service
>>>     preference
>>>
>>>     I suggest that if there are multiple contact addresses for a single
>>>     AOR, the contact element of each related tuple in PIDF should
>>>     reflect a unique contact address for this AOR, not the ambiguous AOR
>>>     itself.
>>>      =

>>>     A unique address is useful, not just as an identifier for the
>>>     tuple's source, but to reach the address; then, the priority
>>>     attribute has a meaningful scope.
>>>      =

>>>     Colm Smyth
>>>     Lead/Architect - Intelligent Presence Server (IPS) | Unified
>>>     Communications
>>>     *AVAYA* | smythc@avaya.com <mailto:smythc@avaya.com> | +353 1 656
>>>     7843 (x37843)
>>>      =

>>>
>>>     -------------------------------------------------------------------=
-----
>>>     *From:* simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] *On
>>>     Behalf Of *JaekwonOH
>>>     *Sent:* 05 August 2008 02:34
>>>     *To:* Simple WG
>>>     *Subject:* [Simple] How to show presentity's relative service prefe=
rence
>>>
>>>     Hi all,
>>>      =

>>>     I'm wondering how a presentity can show his perferred services in
>>>     presence.
>>>     A possibility seems to use the 'priority' attribute of <contact>
>>>     element for this purpose.
>>>     However, RFC 3863 defines that the 'priority' attribute shows the
>>>     presentity's different preference over *contact address*, so it is
>>>     not clear whether this is good enough to show the presentity's
>>>     relative service preference.
>>>     For example, when there are multiple SIP services that share the
>>>     presentity's AOR as contact address, then how the different
>>>     'priority' attribute value for the same contact address should be
>>>     interpreted?
>>>     IMHO, this happens because a service cannot be represented only with
>>>     the contact information. Rather, as noted in RFC 4476, a service is
>>>     identified by the "reach information", which is a set of presence
>>>     information to reach the service including the contact address.
>>>     If this is the case, what should we do?
>>>     Thanks & regards,
>>>      =

>>>     Jaekwon OH
>>>
>>>     -------------------------------------------------------------------=
-----
>>>
>>>     _______________________________________________
>>>     Simple mailing list
>>>     Simple@ietf.org
>>>     https://www.ietf.org/mailman/listinfo/simple
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>> _______________________________________________
>>> Simple mailing list
>>> Simple@ietf.org
>>> https://www.ietf.org/mailman/listinfo/simple
_______________________________________________
Simple mailing list
Simple@ietf.org
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Hi all,

 

There seems to be a few issues 'at work' here, and the discussion 'so
far' may be trying to merge several problems together.  

 

The first is unambiguously trying to identify a contact for an
associated service/application.  Not sure whether this is an issue, may
be more of a 'best practice' or 'prescribed guideline' on how to achieve
this.  

 

How does a watcher interpret or deal with the 'contact' element in
scenarios whereby one tuple (corresponding to a presentity) may not have
any contact elements?  IETF rfc3863 (section 4.1.5) seems to try and
steer away from defining the scope of a 'contact' element in one tuple
and it's applicability or scope within another.  

 

Finally, how do we go about identifying or expressing a presentities
preference for one service over another?  Do we need to include a
separate indication of 'service preference' in the context of PIDF _OR_
is there sufficient detail within the PIDF to infer or derive a given
presentities preference for one service, versus another similar service
(e.g. my preference of Google Talk over MSN)?

 

Perhaps this will help provide a 'frame of reference' for our SIP/SIMPLE
experts within the IETF to help provide some guidance or
recommendations.

 

Kind Regards,

Brian.

 

 


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<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'>Hi all,<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'>There seems to be a few issues &#8216;at work&#8217; here=
,
and the discussion &#8216;so far&#8217; may be trying to merge several probl=
ems
together.&nbsp; <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'>The first is unambiguously trying to identify a contact f=
or
an associated service/application.&nbsp; Not sure whether this is an issue,=
 may
be more of a &#8216;best practice&#8217; or &#8216;prescribed guideline&#821=
7;
on how to achieve this.&nbsp; <o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'>How does a watcher interpret or deal with the &#8216;cont=
act&#8217;
element in scenarios whereby one tuple (corresponding to a presentity) may n=
ot
have any contact elements?&nbsp; IETF rfc3863 (section 4.1.5) seems to try a=
nd
steer away from defining the scope of a &#8216;contact&#8217; element in one
tuple and it&#8217;s applicability or scope within another.&nbsp; <o:p></o:p=
></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'>Finally, how do we go about identifying or expressing a
presentities preference for one service over another?&nbsp; Do we need to
include a separate indication of &#8216;service preference&#8217; in the con=
text
of PIDF _<i><span style=3D'font-style:italic'>OR</span></i>_ is there suffic=
ient
detail within the PIDF to infer or derive a given presentities preference fo=
r
one service, versus another similar service (e.g. my preference of Google Ta=
lk
over MSN)?<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'>Perhaps this will help provide a &#8216;frame of referenc=
e&#8217;
for our SIP/SIMPLE experts within the IETF to help provide some guidance or
recommendations.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'>Kind Regards,<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'>Brian.<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span style=3D'font-size:10=
.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

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Subject: [Simple] Doubt in aborting the MSRP message transfer
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Hello All, 
   
  I have a doubt in Abort procedure used in MSRP Protocol. 
   
  Scenario is, I have active message (ex: file/buffer) transfer going on, and the message receiver aborted the transfer, then according to RFC, it should send response 413 to the sender. 
   
  My question is, 
   Does Receiver endpoint need to generate new transaction id for this 413 response? Or it need to get the trasaction id from previous chunk received for that perticular message?
   
  Thanks in advance
  -Manju

       
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<div>Hello All, </div>  <div>&nbsp;</div>  <div>I have a doubt in Abort procedure used in MSRP Protocol. </div>  <div>&nbsp;</div>  <div>Scenario is, I have active message (ex: file/buffer) transfer going on, and the message receiver aborted the transfer, then according to RFC, it should send response 413 to the sender. </div>  <div>&nbsp;</div>  <div>My question is, </div>  <div>&nbsp;Does Receiver endpoint need to generate new transaction id for this 413 response? Or it need to get the trasaction id from previous chunk received for that perticular message?</div>  <div>&nbsp;</div>  <div>Thanks in advance</div>  <div>-Manju</div><p>&#32;



      
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Hi folks,

This is to announce a Working Group Last Call on the following document
to be published as Informational:
http://www.ietf.org/internet-drafts/draft-ietf-sipping-presence-scaling-
requirements-01.txt

The review period will end on 3 Sept 2008 (3 weeks time).=20

Note that I have cross-posted to the SIMPLE WG, but ask that you please
send your comments only to the SIPPING WG mailing list and authors.

At this point we only have one reviewer that has volunteered:  Vijay
Gurbani
We need at least two others and a presence expert (per RAI review
process).=20

And, we do encourage others to review and make any final comments on the
document at this time (including the very useful "Ready" comment).=20

Thanks,
Mary
SIPPING WG co-chair

As a reminder, the SIPPING WG review guidelines are available at:
https://softarmor.com/sipping/process/wg-review/sipping-review-guideline
s.html


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<!-- Converted from text/rtf format -->

<P><FONT SIZE=3D2 FACE=3D"Courier New">Hi folks,</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Courier New">This is to announce a Working =
Group Last Call on the following document to be published as =
Informational:</FONT>

<BR><A =
HREF=3D"http://www.ietf.org/internet-drafts/draft-ietf-sipping-presence-s=
caling-requirements-01.txt"><U><FONT COLOR=3D"#0000FF" SIZE=3D2 =
FACE=3D"Courier =
New">http://www.ietf.org/internet-drafts/draft-ietf-sipping-presence-scal=
ing-requirements-01.txt</FONT></U></A>
</P>

<P><FONT SIZE=3D2 FACE=3D"Courier New">The review period will end on 3 =
Sept 2008 (3 weeks time). </FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Courier New">Note that I have cross-posted to =
the SIMPLE WG, but ask that you please send your comments only to the =
SIPPING WG mailing list and authors.</FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Courier New">At this point we only have one =
reviewer that has volunteered:&nbsp; Vijay Gurbani</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Courier New">We need at least two others and =
a presence expert (per RAI review process). </FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Courier New">And, we do encourage others to =
review and make any final comments on the document at this time =
(including the very useful &quot;Ready&quot; comment). </FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Courier New">Thanks,</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Courier New">Mary</FONT>

<BR><FONT SIZE=3D2 FACE=3D"Courier New">SIPPING WG co-chair</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Courier New">As a reminder, the SIPPING WG =
review guidelines are available at:</FONT>

<BR><A =
HREF=3D"https://softarmor.com/sipping/process/wg-review/sipping-review-gu=
idelines.html"><U><FONT COLOR=3D"#0000FF" SIZE=3D2 FACE=3D"Courier =
New">https://softarmor.com/sipping/process/wg-review/sipping-review-guide=
lines.html</FONT></U></A>
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Date: Thu, 14 Aug 2008 08:45:41 +0900
From: JaekwonOH <jaekwon.oh@samsung.com>
To: Paul Kyzivat <pkyzivat@cisco.com>
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Cc: Simple WG <simple@ietf.org>
Subject: Re: [Simple] How to show presentity's relative service preference
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Hi Paul,

> What would lead you to think you can't have as many unique addresses as =

> you want?

SIP applications for a registered user (i.e., presentity), such as voip, pt=
t, and im. They can share the user's SIP AOR as contact address, and be dif=
ferentiated each other with different feature tags. =


Thanks & regards,
Jaekwon OH

----- Original Message ----- =

From: "Paul Kyzivat" <pkyzivat@cisco.com>
To: "JaekwonOH" <jaekwon.oh@samsung.com>
Cc: "Smyth, Colm (Colm)" <smythc@avaya.com>; "Simple WG" <simple@ietf.org>
Sent: Friday, August 08, 2008 9:45 PM
Subject: Re: [Simple] How to show presentity's relative service preference


> =

> =

> JaekwonOH wrote:
>> Thanks for comment.
>> =

>>> Only if it wants them to. It certainly may use a separate contact uri =

>>> for each application. (They probably have the same address and are =

>>> distinguished by the user part, or port.) Its the responsibility of the =

>>> application to put in enough uniqueness to get proper results.
>> =

>> I agree that if all each application can have unique contact address the=
n there's no problem.
>> However, as I understand relevant RFCs incl. RFC4479, this seems not alw=
ays the case. =

> =

> What would lead you to think you can't have as many unique addresses as =

> you want?
> =

>> So, when the contact address is not unique over different applications, =
it is questionable whether the priority attribute can be still meaningful t=
o show presentity's relative service preference...
>> =

>> Thanks & regards,
>> Jaekwon OH
>> =

>> ----- Original Message ----- =

>> From: "Paul Kyzivat" <pkyzivat@cisco.com>
>> To: "JaekwonOH" <jaekwon.oh@samsung.com>
>> Cc: "Simple WG" <simple@ietf.org>; "Smyth, Colm (Colm)" <smythc@avaya.co=
m>
>> Sent: Thursday, August 07, 2008 8:49 PM
>> Subject: Re: [Simple] How to show presentity's relative service preferen=
ce
>> =

>> =

>>>
>>> JaekwonOH wrote:
>>>> Hi,
>>>>  =

>>>> Thanks for response.
>>>> Even when the device contact URI registered for an AOR is used for =

>>>> tuple's contact address, the uniqueness of the contact address for a =

>>>> tupe seems not guaranteed. For example, a device may run multiple SIP =

>>>> applications, then tuples for each of those would contain the same URI.
>>> Only if it wants them to. It certainly may use a separate contact uri =

>>> for each application. (They probably have the same address and are =

>>> distinguished by the user part, or port.) Its the responsibility of the =

>>> application to put in enough uniqueness to get proper results.
>>>
>>> Paul
>>>
>>>> This aspect has already been clarified in RFC 4479 (see the following =

>>>> excerption).
>>>> Therefore, IMHO, the uniquness of contact address for each tuple seem =

>>>> not guaranteed, so the use of 'priority' attribute of <contact> in =

>>>> <tuple> is not enogh to show the presenity's relative service preferen=
ce.
>>>>  =

>>>>  From RFC 4479 section 3.3.2 reach information,
>>>>  =

>>>> Even for services reachable over a communications network, the URI
>>>> alone may not be sufficient. For example, two applications may be
>>>> running within a cellular telephone, both of which are reachable
>>>> through the user=92s SIP Address of Record. However, one application
>>>> is launched when the INVITE request contains a body of a particular
>>>> type, and the other is launched for other body types. As another
>>>> example, a service may provide complex application logic that
>>>> operates correctly only when contacted from matching application
>>>> software. In such a case, even though the communications between
>>>> instances utilizes a standard protocol (such as SIP), the user
>>>> experience will not be correct unless the applications are matched.
>>>> When the URI is not sufficient, additional attributes of the service
>>>> can be present that define the instructions on how the service is to
>>>> be reached. These attributes must be understood for the service to
>>>> be utilized. If a watcher receives a presence document containing
>>>> reach information it does not understand, it should discard the
>>>> service information.
>>>>  =

>>>>  =

>>>> Thanks & regards,
>>>> Jaekwon OH
>>>> ----- Original Message -----
>>>>
>>>>     *From:* Smyth, Colm (Colm) <mailto:smythc@avaya.com>
>>>>     *To:* Simple WG <mailto:simple@ietf.org>
>>>>     *Sent:* Wednesday, August 06, 2008 1:23 AM
>>>>     *Subject:* Re: [Simple] How to show presentity's relative service
>>>>     preference
>>>>
>>>>     I suggest that if there are multiple contact addresses for a single
>>>>     AOR, the contact element of each related tuple in PIDF should
>>>>     reflect a unique contact address for this AOR, not the ambiguous A=
OR
>>>>     itself.
>>>>      =

>>>>     A unique address is useful, not just as an identifier for the
>>>>     tuple's source, but to reach the address; then, the priority
>>>>     attribute has a meaningful scope.
>>>>      =

>>>>     Colm Smyth
>>>>     Lead/Architect - Intelligent Presence Server (IPS) | Unified
>>>>     Communications
>>>>     *AVAYA* | smythc@avaya.com <mailto:smythc@avaya.com> | +353 1 656
>>>>     7843 (x37843)
>>>>      =

>>>>
>>>>     ------------------------------------------------------------------=
------
>>>>     *From:* simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] *=
On
>>>>     Behalf Of *JaekwonOH
>>>>     *Sent:* 05 August 2008 02:34
>>>>     *To:* Simple WG
>>>>     *Subject:* [Simple] How to show presentity's relative service pref=
erence
>>>>
>>>>     Hi all,
>>>>      =

>>>>     I'm wondering how a presentity can show his perferred services in
>>>>     presence.
>>>>     A possibility seems to use the 'priority' attribute of <contact>
>>>>     element for this purpose.
>>>>     However, RFC 3863 defines that the 'priority' attribute shows the
>>>>     presentity's different preference over *contact address*, so it is
>>>>     not clear whether this is good enough to show the presentity's
>>>>     relative service preference.
>>>>     For example, when there are multiple SIP services that share the
>>>>     presentity's AOR as contact address, then how the different
>>>>     'priority' attribute value for the same contact address should be
>>>>     interpreted?
>>>>     IMHO, this happens because a service cannot be represented only wi=
th
>>>>     the contact information. Rather, as noted in RFC 4476, a service is
>>>>     identified by the "reach information", which is a set of presence
>>>>     information to reach the service including the contact address.
>>>>     If this is the case, what should we do?
>>>>     Thanks & regards,
>>>>      =

>>>>     Jaekwon OH
>>>>
>>>>     ------------------------------------------------------------------=
------
>>>>
>>>>     _______________________________________________
>>>>     Simple mailing list
>>>>     Simple@ietf.org
>>>>     https://www.ietf.org/mailman/listinfo/simple
>>>>
>>>>
>>>> ----------------------------------------------------------------------=
--
>>>>
>>>> _______________________________________________
>>>> Simple mailing list
>>>> Simple@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/simple
_______________________________________________
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Date: Thu, 14 Aug 2008 01:06:07 +0100
From: "Eduardo Martins" <emmartins@gmail.com>
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Subject: [Simple] Mobicents SIP Presence Service 1.0.0.BETA2 released!
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We are happy to announce Mobicents SIP Presence Service 1.0.0.BETA2!

Release Notes
-------------------------------------------------------------------------------
Mobicents SIP Presence Service is composed by Mobicents XDM and Presence
Servers, on this release you can find:
* Mobicents XDM Server standalone installed in JBboss AS + Mobicents JAIN
SLEE Server (mobicents-sip-presence-xdms-<version>.zip)
* Mobicents XDM Server and Mobicents SIP Presence Servers integrated
installed in JBboss AS + Mobicents JAIN SLEE Server
(mobicents-sip-presence-integrated-<version>.zip)
* Mobicents SIP Presence Service binary package that you can use to install
XDM or Integrated servers in JBoss AS + Mobicents JAIN SLEE Server
(mobicents-sip-presence-<version>.zip)
* Mobicents SIP Presence Service source project that you can use to build
and install XDM or Integrated servers in JBoss AS + Mobicents JAIN SLEE
Server (mobicents-sip-presence-<version>-src.zip)

Where to download from?
-------------------------------------------------------------------------------
The distribution can be found on SourceForge.net.
URL:
https://sourceforge.net/project/showfiles.php?group_id=102670&package_id=287660&release_id=619669

SVN tag: mobicents-sip-presence-service-1.0.0.BETA2

Source repositories:
-------------------------------------------------------------------------------
http://mobicents.googlecode.com/svn/trunk/servers/sip-presence

How to get started:
-------------------------------------------------------------------------------
The servers that are bundled with JBoss AS just need to be started as usual.
For binary or source packages see the README file in the top directory of
the zip file.
Any other directory where additional instructions are needed has its own
README file.

Documentation
-------------------------------------------------------------------------------
http://groups.google.com/group/mobicents-public/web/mobicents-sip-presence-service-guide

Change Log
-------------------------------------------------------------------------------
This is actually the first binary release of the servers, so everything is
new! See full specs, architecture, etc. at
http://groups.google.com/group/mobicents-public/web/mobicents-sip-presence-service-guide

Looking forward to your feedback!!!

Mobicents/JBoss Communication Platform Team

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<div dir="ltr">We are happy to announce Mobicents SIP Presence Service 1.0.0.BETA2!<br><br>Release Notes<br>-------------------------------------------------------------------------------<br>Mobicents SIP Presence Service is composed by Mobicents XDM and Presence Servers, on this release you can find:<br>
*
Mobicents XDM Server standalone installed in JBboss AS + Mobicents JAIN
SLEE Server (mobicents-sip-presence-xdms-&lt;version&gt;.zip)<br>*
Mobicents XDM Server and Mobicents SIP Presence Servers integrated
installed in JBboss AS + Mobicents JAIN SLEE Server
(mobicents-sip-presence-integrated-&lt;version&gt;.zip)<br>* Mobicents
SIP Presence Service binary package that you can use to install XDM or
Integrated servers in JBoss AS + Mobicents JAIN SLEE Server
(mobicents-sip-presence-&lt;version&gt;.zip)<br>* Mobicents SIP
Presence Service source project that you can use to build and install
XDM or Integrated servers in JBoss AS + Mobicents JAIN SLEE Server
(mobicents-sip-presence-&lt;version&gt;-src.zip)<br><br>Where to download from?<br>-------------------------------------------------------------------------------<br>The distribution can be found on SourceForge.net.<br>URL: <a href="https://sourceforge.net/project/showfiles.php?group_id=102670&amp;package_id=287660&amp;release_id=619669">https://sourceforge.net/project/showfiles.php?group_id=102670&amp;package_id=287660&amp;release_id=619669</a><br>
<br>SVN tag: mobicents-sip-presence-service-1.0.0.BETA2<br><br>Source repositories:<br>-------------------------------------------------------------------------------<br><a href="http://mobicents.googlecode.com/svn/trunk/servers/sip-presence">http://mobicents.googlecode.com/svn/trunk/servers/sip-presence</a><br>
<br>How to get started:<br>-------------------------------------------------------------------------------<br>The servers that are bundled with JBoss AS just need to be started as usual.<br>For binary or source packages see the README file in the top directory of the zip file.<br>
Any other directory where additional instructions are needed has its own README file.<br><br>Documentation<br>-------------------------------------------------------------------------------<br><a href="http://groups.google.com/group/mobicents-public/web/mobicents-sip-presence-service-guide">http://groups.google.com/group/mobicents-public/web/mobicents-sip-presence-service-guide</a><br>
<br>Change Log<br>-------------------------------------------------------------------------------<br>This is actually the first binary release of the servers, so everything is new! See full specs, architecture, etc. at<br>
<a href="http://groups.google.com/group/mobicents-public/web/mobicents-sip-presence-service-guide">http://groups.google.com/group/mobicents-public/web/mobicents-sip-presence-service-guide</a><br><br>Looking forward to your feedback!!!<br>
<br>Mobicents/JBoss Communication Platform Team
        </div>

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_______________________________________________
Simple mailing list
Simple@ietf.org
https://www.ietf.org/mailman/listinfo/simple

--===============1798476354==--


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Cc: Simple WG <simple@ietf.org>
Subject: Re: [Simple] How to show presentity's relative service preference
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JaekwonOH wrote:
> Hi Paul,
> =

>> What would lead you to think you can't have as many unique addresses as =

>> you want?
> =

> SIP applications for a registered user (i.e., presentity), such as voip, =
ptt, and im. They can share the user's SIP AOR as contact address, and be d=
ifferentiated each other with different feature tags. =


You didn't answer my question. Unique addresses are cheap. Why not use =

as many as you need?

Also, this subject was discussed at length some years ago.

The question is what you expect the caller to do to establish contact =

with an advertised service of a presentity. The straightforward thing is =

to simply expect the caller to send an INVITE (or whatever) to the =

contact address listed for the service. If there is more than one =

mutually exclusive services that share a contact address, then this is =

not likely to get the intended result.

Alternatively, you may expect the caller to add other signaling elements =

  to the request, over and above the contact address, to indicate what =

service(s)/feature(s)/capabilities it desires of the target when the =

contact address doesn't uniquely identify that.

The problem with the latter is that the caller must know that it is =

expected to do this, and also know *what* additional signaling elements =

to add to achieve this. Its especially problematic if what needs to be =

added varies from one callee to another for the same capability.

A compromise here would be for the registered contact to have embedded =

sip headers. When this contact is used, these headers would be added to =

the request. But that is a feature that isn't universally (or often) =

implemented.

Ensuring that every "service" has a unique contact address is certainly =

likely to maximize the chance of establishing the desired type of =

session. This is easy and cheap for a UA to do if it is implementing its =

own services. If it is depending on an upstream app server to implement =

the services then things get more complex, but I think this approach can =

still work.

	Thanks,
	Paul

> Thanks & regards,
> Jaekwon OH
> =

> ----- Original Message ----- =

> From: "Paul Kyzivat" <pkyzivat@cisco.com>
> To: "JaekwonOH" <jaekwon.oh@samsung.com>
> Cc: "Smyth, Colm (Colm)" <smythc@avaya.com>; "Simple WG" <simple@ietf.org>
> Sent: Friday, August 08, 2008 9:45 PM
> Subject: Re: [Simple] How to show presentity's relative service preference
> =

> =

>>
>> JaekwonOH wrote:
>>> Thanks for comment.
>>>
>>>> Only if it wants them to. It certainly may use a separate contact uri =

>>>> for each application. (They probably have the same address and are =

>>>> distinguished by the user part, or port.) Its the responsibility of th=
e =

>>>> application to put in enough uniqueness to get proper results.
>>> I agree that if all each application can have unique contact address th=
en there's no problem.
>>> However, as I understand relevant RFCs incl. RFC4479, this seems not al=
ways the case. =

>> What would lead you to think you can't have as many unique addresses as =

>> you want?
>>
>>> So, when the contact address is not unique over different applications,=
 it is questionable whether the priority attribute can be still meaningful =
to show presentity's relative service preference...
>>>
>>> Thanks & regards,
>>> Jaekwon OH
>>>
>>> ----- Original Message ----- =

>>> From: "Paul Kyzivat" <pkyzivat@cisco.com>
>>> To: "JaekwonOH" <jaekwon.oh@samsung.com>
>>> Cc: "Simple WG" <simple@ietf.org>; "Smyth, Colm (Colm)" <smythc@avaya.c=
om>
>>> Sent: Thursday, August 07, 2008 8:49 PM
>>> Subject: Re: [Simple] How to show presentity's relative service prefere=
nce
>>>
>>>
>>>> JaekwonOH wrote:
>>>>> Hi,
>>>>>  =

>>>>> Thanks for response.
>>>>> Even when the device contact URI registered for an AOR is used for =

>>>>> tuple's contact address, the uniqueness of the contact address for a =

>>>>> tupe seems not guaranteed. For example, a device may run multiple SIP =

>>>>> applications, then tuples for each of those would contain the same UR=
I.
>>>> Only if it wants them to. It certainly may use a separate contact uri =

>>>> for each application. (They probably have the same address and are =

>>>> distinguished by the user part, or port.) Its the responsibility of th=
e =

>>>> application to put in enough uniqueness to get proper results.
>>>>
>>>> Paul
>>>>
>>>>> This aspect has already been clarified in RFC 4479 (see the following =

>>>>> excerption).
>>>>> Therefore, IMHO, the uniquness of contact address for each tuple seem =

>>>>> not guaranteed, so the use of 'priority' attribute of <contact> in =

>>>>> <tuple> is not enogh to show the presenity's relative service prefere=
nce.
>>>>>  =

>>>>>  From RFC 4479 section 3.3.2 reach information,
>>>>>  =

>>>>> Even for services reachable over a communications network, the URI
>>>>> alone may not be sufficient. For example, two applications may be
>>>>> running within a cellular telephone, both of which are reachable
>>>>> through the user=92s SIP Address of Record. However, one application
>>>>> is launched when the INVITE request contains a body of a particular
>>>>> type, and the other is launched for other body types. As another
>>>>> example, a service may provide complex application logic that
>>>>> operates correctly only when contacted from matching application
>>>>> software. In such a case, even though the communications between
>>>>> instances utilizes a standard protocol (such as SIP), the user
>>>>> experience will not be correct unless the applications are matched.
>>>>> When the URI is not sufficient, additional attributes of the service
>>>>> can be present that define the instructions on how the service is to
>>>>> be reached. These attributes must be understood for the service to
>>>>> be utilized. If a watcher receives a presence document containing
>>>>> reach information it does not understand, it should discard the
>>>>> service information.
>>>>>  =

>>>>>  =

>>>>> Thanks & regards,
>>>>> Jaekwon OH
>>>>> ----- Original Message -----
>>>>>
>>>>>     *From:* Smyth, Colm (Colm) <mailto:smythc@avaya.com>
>>>>>     *To:* Simple WG <mailto:simple@ietf.org>
>>>>>     *Sent:* Wednesday, August 06, 2008 1:23 AM
>>>>>     *Subject:* Re: [Simple] How to show presentity's relative service
>>>>>     preference
>>>>>
>>>>>     I suggest that if there are multiple contact addresses for a sing=
le
>>>>>     AOR, the contact element of each related tuple in PIDF should
>>>>>     reflect a unique contact address for this AOR, not the ambiguous =
AOR
>>>>>     itself.
>>>>>      =

>>>>>     A unique address is useful, not just as an identifier for the
>>>>>     tuple's source, but to reach the address; then, the priority
>>>>>     attribute has a meaningful scope.
>>>>>      =

>>>>>     Colm Smyth
>>>>>     Lead/Architect - Intelligent Presence Server (IPS) | Unified
>>>>>     Communications
>>>>>     *AVAYA* | smythc@avaya.com <mailto:smythc@avaya.com> | +353 1 656
>>>>>     7843 (x37843)
>>>>>      =

>>>>>
>>>>>     -----------------------------------------------------------------=
-------
>>>>>     *From:* simple-bounces@ietf.org [mailto:simple-bounces@ietf.org] =
*On
>>>>>     Behalf Of *JaekwonOH
>>>>>     *Sent:* 05 August 2008 02:34
>>>>>     *To:* Simple WG
>>>>>     *Subject:* [Simple] How to show presentity's relative service pre=
ference
>>>>>
>>>>>     Hi all,
>>>>>      =

>>>>>     I'm wondering how a presentity can show his perferred services in
>>>>>     presence.
>>>>>     A possibility seems to use the 'priority' attribute of <contact>
>>>>>     element for this purpose.
>>>>>     However, RFC 3863 defines that the 'priority' attribute shows the
>>>>>     presentity's different preference over *contact address*, so it is
>>>>>     not clear whether this is good enough to show the presentity's
>>>>>     relative service preference.
>>>>>     For example, when there are multiple SIP services that share the
>>>>>     presentity's AOR as contact address, then how the different
>>>>>     'priority' attribute value for the same contact address should be
>>>>>     interpreted?
>>>>>     IMHO, this happens because a service cannot be represented only w=
ith
>>>>>     the contact information. Rather, as noted in RFC 4476, a service =
is
>>>>>     identified by the "reach information", which is a set of presence
>>>>>     information to reach the service including the contact address.
>>>>>     If this is the case, what should we do?
>>>>>     Thanks & regards,
>>>>>      =

>>>>>     Jaekwon OH
>>>>>
>>>>>     -----------------------------------------------------------------=
-------
>>>>>
>>>>>     _______________________________________________
>>>>>     Simple mailing list
>>>>>     Simple@ietf.org
>>>>>     https://www.ietf.org/mailman/listinfo/simple
>>>>>
>>>>>
>>>>> ---------------------------------------------------------------------=
---
>>>>>
>>>>> _______________________________________________
>>>>> Simple mailing list
>>>>> Simple@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/simple
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From simple-bounces@ietf.org  Wed Aug 20 14:56:24 2008
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From: Ben Campbell <ben@estacado.net>
To: manju kori <manju_be2003@yahoo.com>
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Subject: Re: [Simple] Doubt in aborting the MSRP message transfer
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On Aug 13, 2008, at 7:04 AM, manju kori wrote:

> Hello All,
>
> I have a doubt in Abort procedure used in MSRP Protocol.
>
> Scenario is, I have active message (ex: file/buffer) transfer going  
> on, and the message receiver aborted the transfer, then according to  
> RFC, it should send response 413 to the sender.
>
> My question is,
>  Does Receiver endpoint need to generate new transaction id for this  
> 413 response? Or it need to get the trasaction id from previous  
> chunk received for that perticular message?

The transaction ID for a response is always copied from a received (or  
in process) chunk.

Generally you if you need to send a 413 response, you are either in  
the process of receiving a chunk, or you receive a new chunk after the  
decision to abort. (That is, there is not much point in aborting a  
transfer that is already complete.) You would take the transaction ID  
from that chunk.


>
> Thanks in advance
> -Manju
> _______________________________________________
> Simple mailing list
> Simple@ietf.org
> https://www.ietf.org/mailman/listinfo/simple
>

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From simple-bounces@ietf.org  Wed Aug 27 08:46:46 2008
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Subject: Re: [Simple] draft minutes for SIMPLE at IETF72
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Hello,

1. Noted by another vendor that all current requests are for B2BUA or  
comedia relays, and not MSRP relays.

Comment:

To clarify (the above was aimed at me) the RFPs I received required  
transparent signalling and the MSRP relay was required only for the  
purpose of NAT traversal. The goal was to allow end-points to talk to  
each other and preserve the original end-point session and signalling  
information. So the requirements wanted to have no B2BUAs in the path  
just a transparent SIP Proxy. So we have conflicting stories here.

2. Question: What has changed since the arguments that led us to  
develo MSRP relays? JDR thinks that the initial model of shared TCP  
connections between relays/carriers/enterprises has not developed, so  
people care less about it. We should not be afraid to learn from  
industry experience.

Comment:

During implementation of the MSRPRelay we have discarded the idea of  
sharing TCP connections for multiple MSRP session because it was not  
possible to do end-to-end congestion control for different types of  
MSRP traffic at the same time. This makes the relay less scalable but  
I do not believe is that relevant anymore nowadays. One machine can  
never handle the traffic anyway and an architecture where you have  
more machines working tother is more practical then optimizing session  
in a single box. The standards do not have to be changed to accomodate  
multiple relays to work together like one.

3. Noted that the need for relays has diminished with the increased  
TCPcapacity of modern OS.
Comment:
The above statement does not help traverse NATs so is not a valid  
argument.

Regards,
Adrian

 >>>

Please review and provide any corrections and comments as soon as you  
can.

Thanks!
RjS


=======================

Minutes - SIMPLE - IETF72


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Any opinions on this issue? Quite many had an opinion in Dublin :)

Regards,

Christer


-----Alkuper=E4inen viesti-----
L=E4hett=E4j=E4: simple-bounces@ietf.org puolesta: Christer Holmberg
L=E4hetetty: ti 5.8.2008 14:59
Vastaanottaja: simple@ietf.org
Aihe: [Simple] MSRP-ACM: Comedia stand-alone?
 =


Hi,

As agreed in Dublin, we are planning to set up a phone meeting regarding
the alternative connection model for MSRP.

But, before that I'd like to bring up one issues we need to address:
should one be allowed to use comedia together with the current MSRP
routing model, or will comedia and SDP c/m line routing go together?

If comedia and c/m line routing go together we won't need the msrp-acm
attribute defined in the draft, because the comedia attributes will act
as indicators.

Regards,

Christer



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