Message

The xlink:href MUST be expressed in a UUID syntax (RFC 4122). The file referenced by the xlink:href MUST be present in the ASiC-E Container.

Context
lcm:SubmitObjectsRequest/rim:RegistryObjectList/rim:RegistryObject/rim:RepositoryItemRef
Test
matches(normalize-space(./@xlink:href), '^\./[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}\.eform\.xml$')
Usage
/ lcm:SubmitObjectsRequest / rim:RegistryObjectList / rim:RegistryObject / rim:RepositoryItemRef / @xlink