This is exclusively an FYI...

… a new version of the SHACL draft has just been published:

Shapes Constraint Language (SHACL)
https://www.w3.org/TR/2016/WD-shacl-20160128/

This could be used to check an annotation whether it abides to certain constraints as for the properties it uses, the values those properties may have, etc. However, this is only a general FYI because:

• It's a draft, we cannot count on it to be a Rec in the lifetime of the current group
• It is unclear who the implementers will be. At the moment I presume TopQuandrant will have an implementation (maybe it already has), but I do not know of others
• As it stands today, the draft is fairly opaque for non-RDF people (and even for those it is not necessarily an easy read), it also requires a good understanding of SPARQL, etc.

Note, however, that it should be possible to create a 'Shape' for annotations once and for all, that could be used, in conjunction with a SHACL engine, as a black box validation checker for an Annotation.  I expect it to be fairly complex, though.

Again, this is an FYI, I do not think this is something this WG should do...

Ivan

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Ivan Herman, W3C
Digital Publishing Lead
Home: http://www.w3.org/People/Ivan/
mobile: +31-641044153
ORCID ID: http://orcid.org/0000-0003-0782-2704