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Re: The exact meaning of a 'global identifier' (itemid)

From: Simon Spero <sesuncedu@gmail.com>
Date: Mon, 9 Jun 2014 19:55:08 -0400
Message-ID: <CADE8KM5VsDJ_UJC5iUuaVoJXSz3o9Wvt8D-kZmdOgoV717oaXw@mail.gmail.com>
To: Gregg Kellogg <gregg@greggkellogg.net>
Cc: Jarno van Driel <jarnovandriel@gmail.com>, W3C Web Schemas Task Force <public-vocabs@w3.org>, Markus Lanthaler <markus.lanthaler@gmx.net>
On Mon, Jun 9, 2014 at 6:09 PM, Gregg Kellogg <gregg@greggkellogg.net>
wrote:

>
> Of course, anyone may interpret Microdata however they find useful; it
> would be nice to get some definitive interpretation from schema.org
> partners, but they've (collectively) never been forthcoming on what the
> real semantics of schema.org.
>

 "For a large case of classes, the meaning of a schema.org term is its use
in the language.  And the meaning of itemid is sometimes explained by
pointing at a bear <http://wikiality.wikia.com/Bears>."

I don't think that it safe is in general to use itemid (or itemprop etc)
except with  an absolute url ,  since the base of a relative name may be
affected by redirects.  (It is possible that urn:isbn:978-867-5-309-X might
pass as an itemid, though only itemtypes are protected against being
automatically dereferenced).
Received on Monday, 9 June 2014 23:55:37 UTC

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