support for qualifiers and references in ShEx

[shigapov]

Currently only the wdt-prefix is supported. It would be nice to have support for the following prefixes:

PREFIX p: <http://www.wikidata.org/prop/>
PREFIX pq: <http://www.wikidata.org/prop/qualifier/>
PREFIX pr: <http://www.wikidata.org/prop/reference/>

[VDK]

would be great if the reference support would utilize the Citoid API.

[magnusmanske]

Could you give me an example to test on for these?

[shigapov]

E98

[GreenReaper]

I agree it'd be nice, as I want to be able to add an optional EDTF point of time to specify start/end time to an optional EDTF period, as in this example (ShEx, cradle), since EDTF periods can only specified down to the day but events start at a particular time.