W3C home > Mailing lists > Public > public-rdfa-wg@w3.org > February 2011

Re: Editorial changes to clarify usage of URIs / Absolute URIs and @profile

From: Nathan <nathan@webr3.org>
Date: Tue, 08 Feb 2011 15:14:42 +0000
Message-ID: <4D515DE2.2010704@webr3.org>
To: Ivan Herman <ivan@w3.org>
CC: Shane McCarron <shane@aptest.com>, RDFA Working Group <public-rdfa-wg@w3.org>
Ivan Herman wrote:
> On Feb 8, 2011, at 12:23 , Nathan wrote:
>> Ivan Herman wrote:
>>> On Feb 8, 2011, at 12:12 , Nathan wrote:
>>>> Hi Shane,
>>>> Following on from two discussions on the list about the use of @profiles, and confusion over the terminology "TERMorCURIEorAbsURI" in the current RDFa-Core draft, I'd propose the following clarifications to the spec.
>>>> define:
>>>> URI
>>>>   URI  = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
>>>>   A URI conforming to the Generic URI Syntax, as per section 3 of
>>>>   RFC3986 [1]
>>>> AbsoluteURI
>>>>   absolute-URI  = scheme ":" hier-part [ "?" query ]
>>>>   An absolute-URI as per section 4.3 of RFC 3986 [2]
>>> Wait, I am not sure I understand this.
>>> I do _not_ think that it is worthwhile for us to restrict a @profile value to be an AbsoluteURI in this sense. What you do is to remove the optional fragment, and I think that this is unnecessary on the specification level. We can add some warning on the effect of cache, but that is it.
>>> What I want to be sure of is that I could not do something like
>>> @profile="#me"
>>> ie, a 'pure' fragment ID, ie, a relative URI. (The same, probably, for @vocab.) But the URI specification you quote in the document seems to exclude that anyway. Ie, the spec is probably fine as far as I am concerned, it is just that some explanation might be worth somewhere that we do not use relative URI-s.
>> what about @profile="../foo" (and likewise vocab) ?
> Hm. Yeah:-)

Cool, I'd suggest we may just want to focus on value space rather than 
lexical form then, @profile with a value space of AbsoluteURI, and 
everything else with a value space of URI, as currently indicated by the 
docs. Some text for @profile which says something like:

   a white space separated list of one or more URIs that indicate a 
profile of terms, prefix mappings, and/or default vocabulary 
declarations. Note that the value space of @profile is AbsoluteURI and 
consequently any fragment identifier will be ignored. See RDFa Profiles;



Received on Tuesday, 8 February 2011 15:16:35 UTC

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