- From: Shane McCarron <shane@aptest.com>
- Date: Wed, 21 Apr 2010 10:31:12 -0500
- To: Ivan Herman <ivan@w3.org>
- CC: Mark Birbeck <mark.birbeck@webbackplane.com>, Toby Inkster <tai@g5n.co.uk>, RDFa WG <public-rdfa-wg@w3.org>
- Message-ID: <4BCF1A40.5060705@aptest.com>
Yeah... I am not wild about having special rules for anything in head either... But I see Toby's (implied) point that @profile is only legal on head in HTML4, so people are used to putting it there. That's the disadvantage of reusing an existing attribute, even though there is clearly a lot of overlap between our use of @profile and the use of @profile described in HTML4. Ivan Herman wrote: > To be honest I do not remember the details of the discussion... But you are right. Let me withdraw the 'mistake' remark:-) > > Toby's proposal is a little bit different, though (unless I misunderstand him). Toby, do you propose that if I say > > <html> > <head profile="http://bla"> > ... > </head> > <body> > > ... > </body> > </html> > > Then the effect of the http://bla profile is also valid in the <body>? So this is reminiscent of the treatment of <base> insofar as an element within the <head> has an effect over the whole document. This breaks the clean model of using the XML tree structure. > > We did not have a choice with <base>; that is inherited from HTML. I am not sure doing something similar for another attribute would really be a good idea. If we do it for @profile, we may also want to do it with @vocab... Also, if I put an explicit @about into the <head> that does _not_ affect the <body>, so there would be some inconsistency, too. > > Cheers > > Ivan > > On Apr 21, 2010, at 16:31 , Mark Birbeck wrote: > > >> Hi Ivan, >> >> >>> (I personally happen to think that giving this separate treatment to <head> is a mistake. But that may only be me.) >>> >> I'm pretty certain it was you who spotted that if you did this: >> >> <html typeof="foaf:Document"> >> >> or this: >> >> <head typeof="foaf:Document"> >> >> you would end up with a bnode as the subject of all of the triples in the head. >> >> (I'm not blaming you -- it was an important observation!) >> >> By having an implied @about value we ensure that the triples in the >> head always refer to the current document. >> >> I wouldn't claim it is perfect, but I don't recall anyone coming up >> with a better solution. >> >> We could of course ban @typeof from head, but we've tended to avoid >> those kinds of draconian approaches. >> >> Regards, >> >> Mark >> >> -- >> Mark Birbeck, webBackplane >> >> mark.birbeck@webBackplane.com >> >> http://webBackplane.com/mark-birbeck >> >> webBackplane is a trading name of Backplane Ltd. (company number >> 05972288, registered office: 2nd Floor, 69/85 Tabernacle Street, >> London, EC2A 4RR) >> > > > ---- > 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 > > > > > > -- Shane P. McCarron Phone: +1 763 786-8160 x120 Managing Director Fax: +1 763 786-8180 ApTest Minnesota Inet: shane@aptest.com
Received on Wednesday, 21 April 2010 15:32:04 UTC