How is the following line read out?

urn:li:dataset:(urn:li:dataPlatform:foo,bar,PROD)

I understand the initial parts, urn: just a prefix for this sort of notation. li: namespace. dataset: entity type. Are the remaining parts

(urn:li:dataPlatform:foo,bar,PROD)

a notation for an Entity ID or Aspect or what?? What are the 3 arguments?

the urn is a serialized representation of the KeyAspect of a Dataset. (https://github.com/linkedin/datahub/blob/master/metadata-models/src/main/pegasus/com/linkedin/metadata/key/DatasetKey.pdl). In this case, the Dataset key has three parts: (platform, name, origin)

Thanks @mammoth-bear-12532! I get it now. How and where are the types like "`dataPlatform`" defined? Is it like in

DataPlatformUrn.pdl

?