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[Bug 13452] Explain the point of itemid

From: <bugzilla@jessica.w3.org>
Date: Fri, 29 Jul 2011 14:51:27 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1QmoPP-00045f-4E@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=13452

Karl Dubost <karl+w3c@la-grange.net> changed:

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--- Comment #2 from Karl Dubost <karl+w3c@la-grange.net> 2011-07-29 14:51:26 UTC ---
This is a text proposal.

# Current text:

Elements with an itemscope attribute and an itemtype attribute that references
a vocabulary that is defined to support global identifiers for items may also
have an itemid attribute specified, to give a global identifier for the item,
so that it can be related to other items on pages elsewhere on the Web.


# Proposed text:

Elements with an itemscope attribute and an itemtype attribute may also have an
itemid attribute specifying a global identifier for the item. The global
identifier provide a mechanism to associate related items elsewhere on the Web.



# Current text:

The exact meaning of a global identifier is determined by the vocabulary's
specification. It is up to such specifications to define whether multiple items
with the same global identifier (whether on the same page or on different
pages) are allowed to exist, and what the processing rules for that vocabulary
are with respect to handling the case of multiple items with the same ID.


# Proposed text:

Vocabulary designers are encouraged to allow global identifier on items. It is
up to such specifications to define whether multiple items with the same global
identifier (whether on the same page or on different pages) are allowed to
exist, and what the processing rules for that vocabulary are with respect to
handling the case of multiple items with the same ID.

Content authors should use global identifiers, when encouraged by the
vocabulary specification, to allow vocabulary parsers to associate items across
the Web. Reusing well known identifiers is also encouraged.


-------------
Note

I removed: "The exact meaning of a global identifier is determined by the
vocabulary's specification."
because it is a false statement.

A book vocabulary may say you should use for the value of itemid, URIs of the
type "urn:isbn:" for global identifiers on items. But it doesn't define the
meaning of urn:isbn:123456789.

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Received on Friday, 29 July 2011 14:51:28 UTC

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