W3C home > Mailing lists > Public > public-vocabs@w3.org > November 2011

Re: @itemid and URL properties in schema.org

From: Lawrence Woodman <lwoodman@vlifesystems.com>
Date: Sat, 05 Nov 2011 06:42:37 +0000
Message-ID: <4EB4DADD.1060205@vlifesystems.com>
To: Jeni Tennison <jeni@jenitennison.com>
CC: public-vocabs@w3.org
On 04/11/11 21:17, Jeni Tennison wrote:
> On 4 Nov 2011, at 19:31, Jason Douglas wrote:
>> So to throw a strawman out there, maybe we could:
>> 	 State on schema.org that Thing/url is equivalent to itemid and either is accepted.
> If schema.org does this, it should also state what happens when both are specified and they clash. Perhaps they should be treated as aliases with the @itemid being the canonical URL?

I was in favour of greater use of @itemid, though I don't think 
automatically assuming that url is an alias of @itemid would really 
clear anything up.  One problem that I could see if you used @itemid as 
an alias of URL is that many people would feel that the natural fit for 
@itemid may not be a url but an isbn, isan, issn, etc number.  This 
would be correct for @itemid as it was intended, but of course no good 
for a url.

Because of the risk of clashes and repeating yourself, it may be better 
to explicitly state that it is ignored, as any parser that knows about 
the schema.org vocabulary will know where to get the correct data, and 
any that doesn't wouldn't know what to do with the data that it found 
identified by the @itemid, so would be no further forward.


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Received on Saturday, 5 November 2011 07:23:37 UTC

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