Hello again! How can I define an urn for a dataset field (used in primary keys and on DatasetFieldMapping)? Thank you for the help

You can define a dataset field urn using https://github.com/linkedin/datahub/blob/master/li-utils/src/main/javaPegasus/com/linkedin/common/urn/DatasetFieldUrn.java That said, Dataset field is not yet made a first class entity. This is there in our roadmap and we are working towards that. (Refer this https://github.com/linkedin/datahub/blob/master/docs/rfc/active/1841-lineage/field%20level%20lineage.md )

Ok, looking at the RFC I can see that’s something like:

"urn:li:datasetField:(urn:li:dataset:(urn:li:dataPlatform:billing,bill-invoice,PROD),/invoice_id)"

Is the ‘/’ really necessary on the fieldPath?

Probably there is some hardcoded convention in the code, @ambitious-battery-33996 can confirm.

pathspec defining field paths is not yet open sourced. That is also in our roadmap of filed level lineage. So, today field path is not standardized in open source, soon we will have a plan for that.