In the metadata resulting from the UNION operation avoid adding prefixes (with the name of the original input dataset) since all metadata in the same metadata file are from the same dataset).
Instead add a single new metadata attribute named "_provenance" with the name of the original dataset as its value.
In the metadata resulting from the UNION operation avoid adding prefixes (with the name of the original input dataset) since all metadata in the same metadata file are from the same dataset).
Instead add a single new metadata attribute named "_provenance" with the name of the original dataset as its value.