did:method:val
did:method:VAL
did:method:val123
did:method:123
did:method:val-two
did:method:val_two
did:method:val.two
did:method:val:two
did:method:val%BB
did:method:vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
did:m:v
did:method::::val
did:method:-
did:method:-:_:.:%ab
did:method:.
did:method:_
did:method::.

# allows some real DID values
did:onion:2gzyxa5ihm7nsggfxnu52rck2vv4rvmdlkiu3zzui5du4xyclen53wid
did:example:123456789abcdefghi
did:plc:7iza6de2dwap2sbkpav7c6c6
did:web:example.com
did:web:localhost%3A1234
did:key:zQ3shZc2QzApp2oymGvQbzP8eKheVshBHbU4ZYjeXqwSKEn6N
did:ethr:0xb9c5714089478a327f09197987f16f9e5d936e8a