Cannot link properties without .index file

Perhaps Doxygen can already link to classes in another project. Quoting http://www.stack.nl/~dimitri/doxygen/manual/features.html :
"Doxygen can also automatically generate links to existing documentation that was generated with Doxygen or with Qt's non-public class browser generator. For a Qt based project this means that whenever you refer to members or classes belonging to the Qt toolkit, a link will be generated to the Qt documentation. This is done independent of where this documentation is located!"

unity-action-doc needs to be updated to include a non-gzipped .index file, with which the linking works just fine in the branch.

Fix committed into lp:unity-action-api at revision 30, scheduled for release in unity-action-api, milestone Unknown

Fix committed into lp:ubuntu-ui-toolkit at revision 845, scheduled for release in ubuntu-ui-toolkit, milestone Unknown

This bug was fixed in the package ubuntu-ui-toolkit - 0.1.46+14.04.20131126-0ubuntu1

---------------
ubuntu-ui-toolkit (0.1.46+14.04.20131126-0ubuntu1) trusty; urgency=low

  [ Loïc Molinari ]
  * [UbuntuShape] Informed renderer of index and vertex data patterns.
  * [UbuntuShape] Transformed coordinates of textures packed in atlases.
    (LP: #1252736)

  [ Jani Monoses ]
  * Avoid reference errors in OrientationHelper. (LP: #1244631)

  [ Albert Astals ]
  * Do not include the QtQml catch-all include header Include the
    headers we need instead .
  * Compile properly with make -j10 Otherwise tries to compile the tests
    before the components.so is there and fails.

  [ Christian Dywan ]
  * Only inspect left hand for keywords and omit identifier. (LP:
    #1250653)
  * Merge pot update scripts and tweak 'make pot'. (LP: #1186250)
  * Add dependencies and indexes to link Qt5 and Ubuntu.Unity.Action
    docs. (LP: #1202561)
  * Implement BUILTINS in qmlapicheck to exclude built-in types.
  * Move ubuntu-ui-toolkit-doc dep from -examples to Recommends This way
    it's possible to run autopilot tests without docs.

  [ Zsombor Egri ]
  * Tabs are controlled independently by TabBar from Tabs component.
    (LP: #1246758)

  [ Florian Boucault ]
  * Conditionally disable v8-private dependency if Qt's version >= 5.2.
  * TextArea: added missing MathUtils import. (LP: #1248731)
  * Homogenized the icon related APIs. Everywhere where an icon can be
    set 2 properties are defined: url iconSource: url of any image file
    that can be used as the icon. string iconName: name of the icon in
    the theme. Redundant APIs are now deprecated. Action, ActionItem,
    OptionSelectorDelegate, ListItems.Base and ListItems.Standard have
    been modified. (LP: #1191054)

  [ Leo Arias ]
  * Add the .py files to the qtcreator project. (LP: #1244615)
  * Added logging for all the public methods on the autopilot emulators.

  [ Robert Bruce Park ]
  * Fix indicator tabs ordering.

  [ Michael Zanetti ]
  * fix typo in ListItems.Empty doc string.

  [ tpeeters ]
  * Align ListView header with MainView header. (LP: #1202403, #1202277)
  * Support initial value of selectionMode that is not equal to false.
    (LP: #1250194)

  [ Ubuntu daily release ]
  * Automatic snapshot from revision 859
 -- Ubuntu daily release <email address hidden> Tue, 26 Nov 2013 01:11:34 +0000

This bug was fixed in the package unity-action-api - 1.1.0+14.04.20140206-0ubuntu1

---------------
unity-action-api (1.1.0+14.04.20140206-0ubuntu1) trusty; urgency=medium

  [ Pete Woods ]
  * Add automatic quit action to HUD toolbar.
  * Upload to trusty

  [ Dimitri John Ledkov ]
  * Fix cross-compilation, by using correct qdoc at compile time.

  [ Christian Dywan ]
  * Don't compress files or it breaks reading the docs. (LP: #1202561)
 -- Ubuntu daily release <email address hidden> Thu, 06 Feb 2014 12:02:11 +0000