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Re: PROPOSAL: Errata text regarding defining a prefix of '_'

From: Ivan Herman <ivan@w3.org>
Date: Sat, 14 Nov 2009 19:14:02 +0100
Message-ID: <4AFEF36A.1050907@w3.org>
To: Shane McCarron <shane@aptest.com>
CC: "public-rdf-in-xhtml-tf.w3.org" <public-rdf-in-xhtml-tf@w3.org>

Shane McCarron wrote:
> Just curious - how does it issue a warning?  As part of the graph?

Yes. I generate an extra bnode with predicates referring to a warning
type plus one with a literal for the warning text

Formally this is not generated into the default graph, though, at the
end, I merge all of them together before serialization


> Ivan Herman wrote:
>> Looks fine to me.
>> (I was unsure on the call and I checked: my implementation already does
>> that and issues a warning in case of reusing '_')
>> Thanks
>> ivan
>> Shane McCarron wrote:
>>> At the 12 November meeting, the group agreed that the RDFa Syntax
>>> Specification reserves the prefix of '_', but that it could be clearer
>>> about this.  We agreed to put a clarification in the Errata.  I propose
>>> the following text:
>>> In sections 5.4.5 and 7 the specification indicates that the prefix '_'
>>> is reserved and is used to create / reference blank nodes (bnodes).
>>> Because this prefix is reserved, authors SHOULD NOT declare a mapping
>>> for the prefix '_' and conforming processors MUST NOT incorporate such a
>>> prefix mapping into the 'list of URI mappings' as defined in section
>>> 5.5.


Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
mobile: +31-641044153
PGP Key: http://www.ivan-herman.net/pgpkey.html
FOAF: http://www.ivan-herman.net/foaf.rdf

Received on Saturday, 14 November 2009 18:14:21 UTC

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