Should a semi-colon be allowed in a specific-idstring?

[mrinalwadhwa]

The current version of the DID spec includes examples like this: did:example:123456789abcdefghi;photos

However the grammar doesn't allow that semi-colon. Does this mean that specific schemes can override the generic scheme?

did-reference      = did [ "/" did-path ] [ "#" did-fragment ]
did                = "did:" method ":" specific-idstring
method             = 1*methodchar
methodchar         = %x61-7A / DIGIT
specific-idstring  = idstring *( ":" idstring )
idstring           = 1*idchar
idchar             = ALPHA / DIGIT / "." / "-"

[mrinalwadhwa]

found some discussion about it in the public-credentials mailing list https://lists.w3.org/Archives/Public/public-credentials/2018Feb/thread.html#msg33

[mrinalwadhwa]

Asked this question on the public-credentials mailing list
https://lists.w3.org/Archives/Public/public-credentials/2018Nov/thread.html#msg159

[mrinalwadhwa]

w3c-ccg/did-spec#85
w3c-ccg/did-spec#90

[mrinalwadhwa]

Markus Sabadello wrote:
A specific DID method can certainly NOT override the generic ABNF!

Dmitri Zagidulin wrote:
the example URIs in the spec that contain semicolons
aren't DIDs themselves, they are DID-based Service URIs. (The semicolon is
a proposed mechanism to separate the DID part from the service locator
part). Take a look at the discussion at that PR #90

[mrinalwadhwa]

Added #6 to implement