Hie,
I am working on the project for a Catalog for Mediawiki Extensions. The catalog will be just like a store for extensions where users can find the best suited extension for their need and we were thinking if we could use wikidata as a backend for attributes?
If that is possible, then I need some assistance in deciding that list of attributes which wikidata can provide. Please suggest how to proceed.

A proposal page for the project can be found here:
http://www.mediawiki.org/wiki/MediaWiki/Gallery_of_extensions

Some of the attributes we thought for extensions are:
# Name
# Description
# Image
# Version
# Category
# Version supported
# Added on
...and more.

Regards,
Aditya.
https://www.mediawiki.org/wiki/User:Adi.iiita