Last modified: 2014-11-16 22:59:26 UTC
From the contact the dev team page: http://www.wikidata.org/w/api.php?action=query&prop=revisions&titles=Q64&rvprop=content&format=json For any snak (mainsnaks, qualifiers, reference) datatype field is missing.
Not an issue in the serialization component. It has a TypedSnakSerializer that takes a TypedSnak object.
So the user of the serializer should construct a TypedSnak (for which it might need to fetch the data type, since this is not part of the snak).
Not sure this is something we actually should do. The internal format never had this information. Did we actually check there is a valid use case here?