W3C home > Mailing lists > Public > public-html@w3.org > July 2011

[Bug 13469] New: Enable Web page authors to override text/IRI content

From: <bugzilla@jessica.w3.org>
Date: Sat, 30 Jul 2011 16:07:34 +0000
To: public-html@w3.org
Message-ID: <bug-13469-2495@http.www.w3.org/Bugs/Public/>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=13469

           Summary: Enable Web page authors to override text/IRI content
           Product: HTML WG
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: HTML Microdata (editor: Ian Hickson)
        AssignedTo: ian@hixie.ch
        ReportedBy: msporny@digitalbazaar.com
         QAContact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-wg-issue-tracking@w3.org,
                    public-html@w3.org


This feedback is filed as a personal comment and is not intended to be any sort
of official feedback from any standards working group.

Currently, Microdata does not allow authors to override text content.
Overriding IRI content is less important, but supporting that would be nice as
well. 

http://manu.sporny.org/2011/uber-comparison-rdfa-md-uf/#text-iri-override

Microdata does provide a mechanism to express "hidden" content via <meta> and
<link>, but neither of these mechanisms associate if the data expressed is
overriding something on the page. For example, you can do this in RDFa:

<span property="weight" content="15" datatype="kilograms">fifteen kilos</span>

This is good for at least three reasons:

1. It allows the author to specify what part of the page is being overridden.

2. It enables us to automatically build reasoning maps - for example, a machine
could know that one way to interpret the string "fifteen kilos" is as a unit of
measurement - weight, with a specific datatype of "kilograms".

3. It enables search engines, and other crawlers, to detect if the data that is
being expressed in Microdata/RDFa on the page matches up with what is visible
to the people looking at the page. You cannot do that with <meta> and <link> -
which leaves <meta> and <link> more open to abuse by overzealous SEO folks.

I suggest that Microdata remove the capability to use <meta> and <link> from
the places it expanded their scope and instead drop back to an attribute value,
such as @itemvalue.

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Received on Saturday, 30 July 2011 16:07:35 UTC

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