docs: comments on 2 vocabulary choices

potential for our custom descriptiontypes for various note types
and also to add to the role_map for contributor roles
couple referencs to Art + Rare Materials BIBFRAME extension

migrate/maps.py

@@ -37,8 +37,9 @@
 
 # creator/contributor roles
 # ! NOTE cast terms to LOWERCASE before using this map. Our metadata is inconsistent between title case and lowercase.
-# MODS (uses MARC list): https://www.loc.gov/marc/relators/relaterm.html
+# MODS (uses MARC list): https://www.loc.gov/marc/relators/relaterm.html | https://id.loc.gov/vocabulary/relators.html
 # Invenio roles: https://github.com/inveniosoftware/invenio-rdm-records/blob/master/invenio_rdm_records/fixtures/data/vocabularies/roles.yaml
+# Another option: https://art-and-rare-materials-bf-ext.github.io/arm/v1.0/vocabularies/relator.html
 # Maps from our existing values of mods/name/role/roleTerm to terms either in the MARC relator list of the Invenio roles vocab.
 role_map: dict[str, str] = {
     # 2 FASHN items, person is creator/artist

migrate/record.py

@@ -267,6 +267,8 @@ def descriptions(self) -> list[dict[str, Any]]:
         # /api/vocabularies/descriptiontypes
         # types: abstract, methods, series-information, table-of-contents, technical-info, other
         # https://datacite-metadata-schema.readthedocs.io/en/4.5/properties/description/#a-descriptiontype
+        # ? do we want to define our own description types?
+        # One option: https://art-and-rare-materials-bf-ext.github.io/arm/v1.0/vocabularies/note_types.html
 
         desc = []
         if len(self.abstracts) > 1: