The DITA map is wrong in a few places, and the file name should be changed.

Below are described the needed changes:

2. I also change the maps from cxx maps to normal maps and fixed a couple of other things that broke the DITA processing. Here's the search-replace script (with comments) to show what gets changed:
<replace dir="${content.workdir}/api" includes="**/qt-dita-map.xml" summary = "true" >
<replacefilter -> cxx map to normal map
token='!DOCTYPE cxxAPIMap PUBLIC "-//NOKIA//DTD DITA C++ API Map Reference Type v0.6.0//EN" "dtd/cxxAPIMap.dtd"'
value='!DOCTYPE map PUBLIC "-//OASIS//DTD DITA Map//EN" "map.dtd"'
/>
<replacefilter -> more cxx map to normal map changes
token='cxxAPIMap id="Qt-DITA-Map" title="Qt DITA Map"'
value='map'
/>
<replacefilter -> and more cxx to normal
token='/cxxAPIMap'
value='/map'
/>
<replacefilter -> removed map self-reference that is always generated at the end of the map
token='<topicref href="qt-dita-map.xml" type="topic"/>'
value=''
/>
<replacefilter ->
token='type="topic"'
value=''
/>
</replace>

3. Also, with respect to the maps, the script changes the map filename to api.ditamap so it's easy to spot the map file amongst all the .xml topic files. "qt.ditamap" would be a better name since the content is not always an api.