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

Re: RDFa 1.1 Lite

From: Jason Douglas <jasondouglas@google.com>
Date: Fri, 21 Oct 2011 10:08:10 -0700
Message-ID: <CAEiKvUD57C2FB82nqcLrNQgHwEv+6+Yx+a-Y0fs5QyCez=UZ-w@mail.gmail.com>
To: Ivan Herman <ivan@w3.org>
Cc: Manu Sporny <msporny@digitalbazaar.com>, W3C Vocabularies <public-vocabs@w3.org>
There's a lot to like here.  However, the two biggest issues raised in the
discussion at the workshop seem unaddressed / unacknowledged to me by this
document:

1/ Why both property and rel?  There was concern expressed that implementers
wouldn't understand the difference (honestly, I'm not sure I do) and it
wasn't made clear why having both is necessary. If the distinction is
literal value vs. url, why not use value precedence (like itemprop in
microdata)?

2/ Layer-ability on existing markup.  That's probably too abstract a
label... basically, implementers have found the itemref feature of microdata
to be useful in layering vocabulary on top of existing pages.  For example,
if the name of a product is in one part of the DOM tree, but it's properties
are in an entirely different one, how do you combine them?  I assume this
can be done with about=, but it's not clear to me from this document exactly
how.  If both the about URI and the markup with the about attribute have
RDFa in them, how are those properties and types combined?

-jason


On Fri, Oct 21, 2011 at 7:59 AM, Ivan Herman <ivan@w3.org> wrote:

> Manu,
>
> thanks a lot. This makes it clearer. Actually... much clearer.
>
> The question is: is there a need, in your view and based on the
> discussions: to 'formally' define RDFa 1.1 Lite as some sort of a 'profile'
> (oops, I used this ugly term again:-) of RDF 1.1? To formally define some
> sort of a conformance criteria for processors? With all my love to your blog
> page:-), it would be good to have that documented somewhere, probably on the
> W3C site...
>
> Also: does RDFa 1.1 Lite include the initial context? Ie, the default
> prefixes and terms?
>
> Ivan
>
> On Oct 21, 2011, at 15:55 , Manu Sporny wrote:
>
> > Hi folks,
> >
> > During the schema.org workshop, a proposal was put forth by RDFa’s
> > resident hero, Ben Adida, for a stripped down version of RDFa 1.1,
> > called RDFa 1.1 Lite. The RDFa syntax is often criticized as having too
> > much functionality, leaving first-time authors confused about the more
> > advanced features. This lighter version of RDFa will help authors easily
> > jump into the Linked Data world. The goal was to create a very minimal
> > subset that will work for 80% of the folks out there doing simple markup
> > for things like search engines.
> >
> > Summary: RDFa 1.1 Lite is a simple subset of RDFa consisting of the
> > following attributes: vocab, typeof, property, rel, about and prefix.
> >
> > http://manu.sporny.org/2011/rdfa-lite/
> >
> > -- manu
> >
> > --
> > Manu Sporny (skype: msporny, twitter: manusporny)
> > Founder/CEO - Digital Bazaar, Inc.
> > blog: Standardizing Payment Links - Why Online Tipping has Failed
> > http://manu.sporny.org/2011/payment-links/
> >
>
>
> ----
> 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 Friday, 21 October 2011 17:08:36 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Tuesday, 22 May 2012 06:48:56 GMT