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# 11. Change history

## 11.1. Changes since 1.1

- Changed WM_CLIENT_NAME(STRING) from suggested to required for _NET_WM_PID.

- Specification and sample code for the content of WM_CLIENT_NAME(STRING).

- Added _NET_WM_WINDOW_TYPE_SPLASH, _NET_WM_WINDOW_TYPE_UTILITY.

- Added _NET_WM_STATE_FULLSCREEN.

- Added _NET_WM_ALLOWED_ACTIONS.

- Added _NET_WM_STATE_HIDDEN and clarified purpose of _NET_WM_STATE_SKIP_PAGER and _NET_WM_STATE_SKIP_TASKBAR. Changed section on virtual desktop implementation to suggest ICCCM compliance regarding IconicState, using _NET_WM_STATE_HIDDEN to avoid confusion. Added implementation note for pagers on when to display a window.

- Added button field and new directions for keyboard-initiated actions to the _NET_WM_MOVERESIZE message.

- Added advice on removing _NET_WM_STATE and _NET_WM_DESKTOP when a window is withdrawn.

- Added _NET_DESKTOP_LAYOUT to allow a Pager to specify inter-desktop geometry.

- Added _NET_SHOWING_DESKTOP.

- Added _NET_WM_STATE_FLOATING.

## 11.2. Changes since 1.0

- Fix doctype, add author info, update data.

- Change specification description wording to be more inclusive, and to reflect the joint nature of the specification.

- Fix miscellaneous typographical, grammar and spelling errors.

- Clarified _NET_SUPPORTED to include ALL atoms, not just the property names.

- Various corrections to use of MUST and SHOULD.

- Fix problem in _NET_WM_ICON where 'bytes' should have been 'cardinals'

- Replaced ISO-8559-1 characters with entities.

## 11.3. Changes since 1.0pre5

- Change history moved to end.

- UTF-8 Reference updated.

- Window Gravity information updated.

- Copyright Added.

- Minor typo corrections.

## 11.4. Changes since 1.0pre4

- Clarified the interpretation of client-provided geometries on large desktops.

- Added more explanation for _NET_DESKTOP_NAMES.

- Added _NET_WM_ICON_NAME and _NET_WM_VISIBLE_ICON_NAME.

- Tried to improve the wording of _NET_WM_STRUT explanation.

- Changed _NET_WORKAREA to an array of viewport-relative geometries.

- Updated list of "dependent" properties for _NET_NUMBER_OF_DESKTOPS to include _NET_WORKAREA and _NET_DESKTOP_VIEWPORT.

- Tidied formatting of all client messages.

## 11.5. Changes since 1.0pre3

- Added information about common non-ICCCM features.

- Added explanation of sending messages to the root window.

- Removed XA_ prefix from type names.

- Clarified that "mapping order" refers to initial mapping and specify the directions of both orders.

- Clarified that desktops have a common size specified by _NET_DESKTOP_GEOMETRY.

- Rewrote explanation of _NET_DESKTOP_VIEWPORT.

- Tidied formatting of _NET_CURRENT_DESKTOP.

- Replaced "window handle" by "window ID".

- Tidied formatting of _NET_WORKAREA.

- Rewrote the motivation for _NET_VIRTUAL_ROOTS.

- Added advice on Pointer grabs to _NET_WM_MOVERESIZE.

- Fixed typos in _NET_WM_STATE.

- Added _NET_WM_STATE_SKIP_PAGER.

- Tidied formatting of _NET_WM_STRUT.

- Tidied formatting of _NET_WM_ICON_GEOMETRY.

## 11.6. Changes since 1.0pre2

- _NET_SET_NUMBER_OF_DESKTOPS -> _NET_NUMBER_OF_DESKTOPS for consistency.

- _NET_WM_VISIBLE_NAME_STRING -> _NET_WM_VISIBLE_NAME for consistency.

- _NET_WM_STATE: added explanation of permitted extensions. Added explanation of being set / not set.

- Spellchecked, corrected various typos.

- UTF8 -> UTF-8 for consistency.

- added references to the ICCCM an UTF-8 (incomplete).

- added data and event formats where missing.

- clarified _NET_SUPPORTING_WM_CHECK.

- fixed formatting of _NET_CLOSE_WINDOW message.

## 11.7. Changes since 1.0pre1

- Removed implementation note concerning Gnome's (potential) file manager behaviour.

- The Window Movement section of the implementation notes has been revised.

## 11.8. Changes since 1.9f

- Revised revision number for first accepted release 1.9XX -> 1.0preXX.

- Prerequisites for adoption of this specification added.

- Tidied formatting of _NET_CURRENT_DESKTOP for consistency.

- Tidied formatting of _NET_ACTIVE_WINDOW for consistency. Removed doubled text.

- Tidied formatting of _NET_WM_DESKTOP for consistency.

- Killing Hung Processes implementation note added. _NET_WM_PID and _NET_WM_PING now link to this.

- Clarified x_root and y_root meaning for _NET_WM_MOVERESIZE.

- Added contributor list.

## 11.9. Changes since 1.9e

- Added _NET_WM_VISIBLE_NAME_STRING

- Removed ambiguity from _NET_NUMBER_OF_DESKTOPS and _NET_DESKTOP_NAMES in combination.

- Set _NET_WM_MOVERESIZE format to 32 for consistency.

- Removed _NET_PROPERTIES.

- Removed comment from _NET_WM_MOVERESIZE.

## 11.10. Changes since 1.9d

- Added _NET_VIRTUAL_ROOTS

- Added note about ICCCM compliant window moves.

- Added _NET_WM_HANDLED_ICONS

- Added _NET_SUPPORTING_WM_CHECK

- Removed degrees of activation

## 11.11. Changes since 1.9c

- Removed packaging of hints into 2 X properties. Jim Gettys points out that the performance gains of fewer round trips can be better achieved using Xlib routines.

- Clarified that _NET_DESKTOP_VIEWPORT is in pixels

- _NET_DESKTOP_VIEWPORT is now an array, one for each desktop, to allow for different active viewports on different desktops

- _NET_WM_STRUT now only applies on desktops on which the client is visible

- Introduced RFC 2119 language, and attempted to clarify the roles of the Window Manager, Pagers and Applications

- Added _NET_WM_NAME

- _NET_DESKTOP_NAMES now in UTF8

- Desktops now start from 0

- Added _NET_WM_PID

- Added _NET_WM_PING protocol

- Added _NET_WM_STATE_SKIP_TASKBAR

## 11.12. Changes since 1.9b

- Removed _NET_NUMBER_OF_DESKTOPS client message, as it overlaps unnecessarily with _NET_{INSERT/DELETE}_DESKTOP.

- Replaced _NET_WM_LAYER and _NET_WM_HINTS with _NET_WM_WINDOW_TYPE functional hint.

- Changed _NET_WM_STATE to a list of atoms, for extensibility.

- Expanded description of _NET_WORKAREA and _NET_WM_STRUT.

- Removed _NET_WM_SIZEMOVE_NOTIFY protocol.

- Added degrees of activation to _NET_ACTIVE_WINDOW client message

- Added _NET_WM_ICON

- My comments are in [[ ]]. Comments from Marko's draft are in [[MM: ]]

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