rdfdatashapestracker-ISSUE-2 (Audience skills): What skills is expected/required from our audience?

rdfdatashapestracker-ISSUE-2 (Audience skills): What skills is expected/required from our audience?

http://www.w3.org/2014/data-shapes/track/issues/2

Raised by: Arnaud Le Hors
On product: 

We've started discussing who the audience for Shapes is but what have not discussed what skills the audience is expected to have.
We can assume general understanding of the basic RDF data model but what about RDFS, SPARQL, and OWL? Can we expect users of Shapes to be expert in these? Anything else?