json-ld

Would be supercool to have "BlogPosting" as article JSON-LD type.

From the Google Docs (https://developers.google.com/search/docs/data-types/article#non-amp):

Article objects must be based on one of the following schema.org types: Article, NewsArticle, BlogPosting. (https://schema.org/BlogPosting)

I tried to use "BlogJsonLd" as type for Blogposts, but the Google Rich Result Test (https:

Triples within a TriplesBlock are list elements. E.g.:

expr = Builtin_NOTEXISTS(
                graph = GroupGraphPatternSub(
                    part = [TriplesBlock_{'triples': [[rdflib.term.Variable('a'), rdflib.term.URIRef('https://github.com/GreenfishK/DataCitation/citing/valid_from'), rdflib.term.Variable('valid_from')]], '_vars': set()}]
                    _vars = set()
        

Describe the feature

I'm not 100% sure we actually get this from our data source but it would be nice having a program-accessible constant that refers to the Schema.org version that the code is currently using.

Let's show some examples of integration with kgextension
https://kgextension.readthedocs.io/en/latest/

Could be another notebook added to the tutorial.

Where it fits, we might also integrate as a dependency?