We're planning on implementing search in the Wikipedia app based on Wikidata, rather than OpenSearch. As the user types, he gets results based on wbsearchentities, and upon tapping a result, is taken to that particular article on the wiki they have chosen in settings.

Current API Call sequence:

1. Call action=wbsearchentities with what I want to search for.
2. Get id of what item I'm interested in
3. Call action=wbgetentities with the id of the item I'm interested in, with parameters sites=<wiki-i-want>&ids=<id-i-want>&props=sitelinks
4. I get back *all* the sitelinks, and I just pick the one I want and ignore the rest
5. I parse the exact article title from the sitelink, and navigate the user to that.

This is slow and wasteful. Ideally,

1. Call action=wbsearchentities with search=<term>&language=<lang>&sitelinks=<wikiname>
2. I get results, where the sitelink for the wiki(s?) i specified are also in the results
3. I parse the exact article title from the sitelink, and navigate the user to that.

Just one network call, and a lot less data transfer too.