I see

"owners" : [ "urn:li:corpuser:fbar", "urn:li:corpuser:bfoo" ],

in the file DatasetUrn.pdl . What does it mean to have 2 specific "owners" here inside the schema of DataSetUrn? That too with IDs like "fbar" and "bfoo" ?

Strongly-typed URNs (like DatasetUrn.pdl, ChartUrn.pdl, etc) are deprecated. This owners field is thus also deprecated and is not used by DataHub internally. You can ignore it

I don't see any deprecation annotation or any mention of that in the PDL files. It would be helpful to the developer community if these are marked so and newer version or replacements are also mentioned in the file.