We’re using mongoDB a lot, so I tried to hook up the mongodb ingestion plugin: https://datahubproject.io/docs/generated/ingestion/sources/mongodb/ Whilst it is able to see the data, it does not seem to extract the validation json schema as metadata - is this correct?

You are right. As described in the mongodb source document, it inferences schema metadata by referring sample of documents directly and not by using validator json schema.

okay thanks - I misread this part:

Databases and associated metadata

nevertheless, since the schema is in there, I would like to extract it from mongoDb. I’ll play around a bit to see if I am able to come up with something. I’ll let you know - maybe we can add it to the ingestor as an option

sure, totally makes sense.