Re: Major overhaul of the RDFa primer

On Fri, Sep 9, 2011 at 1:06 PM, Ivan Herman <ivan@w3.org> wrote:

>
> >
> > That's good, I think it illustrates well when prefixes are required (and
> when vocab alone is enough). Note that the first OGP example with full URIs
> is not something that will be parsed ok by Facebook afaik. Maybe you could
> swap og and dc in this particular example, so full URIs are never used for
> OGP (use full URIs for dc instead)?
> >
>
> In this sense that would not work either, because they only understand
> prefixes and the first example uses vocab only...
>

Oh, right, I overlooked the @vocab.


>
> > I read this as an encouragement to using blank nodes. I think we should
> encourage the use of identifiers and only encourage blank nodes when
> appropriate. Earlier in the document, some advantages are given for using
> URIs as opposed to ambiguous tokens like 'title' or 'created'. I think the
> primer should follow this for data items too. Social networks is a good
> example where using or reusing URIs for people is good and prevents
> ambiguity (many social networds provide URIs for profiles, even if not all
> of them are typed foaf:Person). Or did you purposely leave out the @about to
> avoid opening the foaf:Person/foaf:Document can of worm, in other words to
> avoid people from asserting that homepages are foaf:Person's?
>
> There is that. There is also the issue about typeof defined in a way that
> it *does* generate those blank nodes and, because it is one of the features
> that often bites when using RDFa, it is important to node it there.
>
> Nevertheless: what I did was to remove that 'particularly useful' bit from
> the comment. I have also added an extra paragraph on the fact that real URIs
> should be the preferred practice. Does this sound better?


It does sound better, though I haven't seen the updated version online (I'm
assuming you haven't deployed these changes yet).


Another comment: "The rdf vocabulary is located at ." is missing some URI
in 4. You Said Something about RDF?


Steph.


>
> >
> > [[[
> > Figure 9: Structrure of Alice’s Site:
> > ]]]
> > s/Structrure/Structure
>
>
> And oops again...
>
>
> >
> > Steph.
> >
>
>
> Thanks a lot Stéphane!
>
> Ivan
>
> ----
> 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
>
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