We have some breaking API changes that will soon be deployed to wikidata.org.
The deployment date should be: 9th September 2015 (just under 2 weeks)
The change making the breaks an be found at:
The breaking changes are: - XML output aliases are now grouped by language
- XML output may no longer give elements when they are empty
- XML any claim, qualifier, reference or snak elements that had an '_idx' element will no longer have it
- ALL output may now give empty elements, ie. labels when an entity has none
If you want to see a wikipage explaining these changes take a look at:
If you have any questions regarding these breaking changes please ask!