OGC catalog integration with IDSA Metadatabroker

[pzaborowski]

IDSA defines the MetadataBroker:
https://github.com/International-Data-Spaces-Association/IDS-G/tree/main/Components/MetaDataBroker
that in particular proposes endpoints for catalog and catalog items:
https://app.swaggerhub.com/apis/idsa/IDS-Broker/1.3.1#/Catalog/get_Catalog
https://app.swaggerhub.com/apis/idsa/IDS-Broker/1.3.1#/Resource/get_Catalog__resource_id_

If the catalog contains data objects it might be extended with the data metadata description and additional querying operations from OGC API Records and similar.
If the catalog is resource can be OGC Records service, catalog metadata could be used in similar way.

I'm not sure if any of these is the envisioned approach how the catalog service shall be integrated for specific data.
Do we know any good examples for this case?