TS-0004 : Non-normative language in 7.4.34.2.3 Originator: Update (SemanticDescriptor)
In TS-0004, clause 7.4.34.2.3 SemanticDescriptor -> Originator -> Update) the first point is:
The descriptor attribute can be updated using SPARQL as follows: [..]
This is an optional step an originator may perform as part of the normative procedure, so this should follow the drafting rules:
The descriptor attribute may be updated using SPARQL as follows: [..]