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[Bug 13929] The microdata vCard and vEvent vocabularies support global identifiers, but the RFC UID formats are invalid URLs

From: <bugzilla@jessica.w3.org>
Date: Mon, 17 Oct 2011 19:25:21 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1RFsoL-0002ww-0n@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=13929

Ian 'Hixie' Hickson <ian@hixie.ch> changed:

           What    |Removed                     |Added
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                 CC|                            |ian@hixie.ch,
                   |                            |philipj@opera.com

--- Comment #2 from Ian 'Hixie' Hickson <ian@hixie.ch> 2011-10-17 19:25:19 UTC ---
So there's two ways we can go with this:

 - make itemid="" any arbitrary string, with vocabularies defining the precise
requirements on uniqueness and syntax

 - make the vCard and vEvent vocabs not use itemid="".

I think I'm leaning towards the second. The problem with the first is that it
might encourage people to use itemid="" for things like ISBN number, which
would lead them to difficulties if they decide their items aren't exactly one
publication, so for example a hard cover edition and paperback edition would
have the same item.

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