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Subject: RE: [xri] Update to Metadata Issue #1: Add $t Tag for Identifier Metadata


Hi All,

I'm kicking myself now because I didn't think of saying the following
during the conference call. I hope it clarifies.

There is good precedent for the $t proposal in the exising $l metadata
tag:

The valid language tags that can immediately follow $l are described in
another spec. The valid identifier type values that could immediately
follow $t would be listed in another specification.

The namespace of language tags is administered by IANA. The namespace of
identifier types would be administered by an appropriate authority.

The language tags inform the consuming application how the XRI, or
sub-segment of the XRI, is intended to be understood, interpreted, or
pronounced. The identifier type values would inform a consuming
application how the XRI, or sub-segment of the XRI, should be processed,
normalized, checked for equivalence, resolved, etc.

The spec says $l language tags are significant in XRI resolution. Dave
says the $t identifier types would be significant to resolution.

Hope this helps.

Marty.Schleiff@boeing.com; CISSP
Associate Technical Fellow - Cyber Identity Specialist
Computing Security Infrastructure
(425) 957-5667


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