Mapping of ISO19139´s Service Metadata `srv.operatesOn` to DCAT-APs `dcat:servesDataset`

[laers]

I have made a test trying to provide a mapping to dcat:servesDataset. It seems only to work if the srv:operatesOn refers to a Dataset only by uuidref. And not if the xlink:href also occurs in ISO19139 MD.

Summary of my test:

[jakubklimek]

Related to SEMICeu/GeoDCAT-AP#140