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Re: WebID-ISSUE-11: define an inverse of cert:identity

From: Manu Sporny <msporny@digitalbazaar.com>
Date: Sun, 30 Jan 2011 12:16:47 -0500
Message-ID: <4D459CFF.403@digitalbazaar.com>
To: RDFA Working Group <public-rdfa-wg@w3.org>
On 01/30/2011 11:34 AM, Nathan wrote:
> I didn't realise @rev was "entirely obsolete, and must not be used by
> authors" in html5 ?

HTML+RDFa re-introduces @rev - which is allowed since the RDFa spec
layers on top of the HTML spec and can thus make modifications to the
language. This is allowed per this text in the HTML5 spec:

"""
When vendor-neutral extensions to this specification are needed, either
this specification can be updated accordingly, or an extension
specification can be written that overrides the requirements in this
specification. When someone applying this specification to their
activities decides that they will recognize the requirements of such an
extension specification, it becomes an applicable specification for the
purposes of conformance requirements in this specification.
"""

Only supporting @rel would require every vocabulary out there to specify
two uni-directional properties - for example:

Instead of just:

ex:owns

without @rev, you would need:

ex:owns
ex:belongsTo

Having two vocab terms instead of one makes reasoning more complicated.

We also need @rev there for backwards-compat reasons.

> issue?

Not an issue unless someone can think of a technical reason that
supporting @rev would cause in HTML.

If someone would want to remove @rev - we would create a
backwards-compat issue and that would generate far more objections than
keeping it in there.

Unless there are any objections, I'm not going to raise an issue for this.

-- manu

-- 
Manu Sporny (skype: msporny, twitter: manusporny)
President/CEO - Digital Bazaar, Inc.
blog: Linked Data in JSON
http://digitalbazaar.com/2010/10/30/json-ld/
Received on Sunday, 30 January 2011 17:17:16 GMT

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