Add clause for 'Specifications using RDFS, SHACL, and OWL to state requirements'

[dr-shorthair]

Alongside the clauses for UML, XML Schema etc.

[cnreediii]

@dr-shorthair That should be "standards using . . . :-) That said, while I do not disagree with the suggestion, who will write these clauses? And what are the implications with using Metanorma? Again, another topic for discussion!