The local @context, used by NGSI-LD users of the platform has now taken into account those generic terms which are in the commons-schema.json at the root.
In fact, there is a @context based on these terms named common-context.jsonld.
So, the common terms have an IRI with this pattern https://smartdatamodels.org/term that in most cases is taking you to an actual page with some information about the term.
Slack channel
Validate a payload with a data model