I have another solution I use often : i prefix the identifier, so I can use multiple unique dcterms:identifier: isbn:123456, local:abcd, doi:123/456/789, lib:950:54, etc.
I have another solution I use often : i prefix the identifier, so I can use multiple unique dcterms:identifier: isbn:123456, local:abcd, doi:123/456/789, lib:950:54, etc.