Last modified: 2012-12-13 11:21:12 UTC
Expose the prefix search in the API, and return a list of Item ID, Label, Description. If easy, comply to the OpenSearch spec (or else open a bug for that).
Drop OpenSearch here, it does not make sense. Incoming parameters are: prefix, language, entitytype. Returned is a sorted array of hits. Each hit contains an ID, a label (optional), a description (optional), and 1 alias (optional and iff hit on the given alias).
Forget the spec here, take the one here: http://meta.wikimedia.org/wiki/Wikidata/Development/wbsearchentity
verified on internal demo system