What is the difference between mapping_provider and subject_source?

[matentzn]

Could you please clarify the distinction between

• mapping_provider if the source indicates "where the mapping was pulled from"
• subject_source if the source indicates which terminology the source id lives in.

Originally posted by @saubin78 in agroportal/project-management#265 (comment)

[matentzn]

The current specifications:

• mapping_provider: URL pointing to the source that provided the mapping, for example an ontology that already contains the mappings, or a database from which it was derived.
• subject_source: URI of ontology source for the subject.

The definition for subject source is a bit poor (and incomplete), so lets try to clarify it:

• mapping_provider: URL pointing to the source that provided the mapping, for example an ontology that already contains the mappings, or a database from which it was derived.
• subject_source: The reference of the ontology, terminology or database to which subject_id belongs.

So the difference is:

• mapping_provider can be anyone (I can provide mappings between Disease Ontology and ICD10 in my own database, like for example https://bridgedb.github.io/).
• DOID:123 belongs to Disease Ontology, some obo:doid or wikidata:Q5282129

Does this make sense @saubin78?