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Folks,

thank you all for your suggestions!

Kind regards,
Laszlo

2011/3/28 Martin Hepp <martin.hepp at ebusiness-unibw.org>

> Dear Laszlo:
>
> You do not have to polish an existing HTML4 or buggy HTML page into valid
> XHTML or HTML5 before adding GoodRelations in RDFa.
>
> Most RDFa parsers, e.g. PyRDFa, are able to correctly extract RDF from RDFa
> in "buggy" HTML markup.
>
> However, the cleaner the markup, the more reliable the extraction, so you
> make your pages more accessible for novel search engines if your markup is
> consistent.
>
> Buggy markup is more problematic if you use RDFa closely interwoven with
> existing visible page content, it is less of a problem if you use RDFa in
> "snippet style".
>
> For more info, see
> http://www.ebusiness-unibw.org/wiki/RDFaAuthoring#RDFa_in_Snippet_Style
>
> In general: Lack of well-formedness is more problematic than e.g. misspelt
> HTML element names or invalid attributes (e.g. missing "alt" for images).
> The main obstacle for RDFa parsers are those cases where they have to guess
> the position of a missing closing element.
>
>
> Bottom-line: If you can keep your page valid XHTML, try to do that. But if
> can't, this should not stop you from adding GoodRelations to your page.
> GoodRelations in RDFa in a page not yet being valid XHTML or HTML5 is better
> than no GoodRelations ;-)
>
> Best wishes
>
> Martin Hepp
>
>
> On Mar 28, 2011, at 11:14 AM, László Török wrote:
>
> > Hi,
> >
> > I've started to play around with the GoodRelations vocab recently, after
> trying to add RDFa content to an existing HTML page I discovered that the
> RDFa was only defined for XHTML.
> >
> > Now, we know there HTML parsers are quite tolerant and always try to make
> the best out of broken or not 100% valid markup.
> >
> > My question is: Having a legacy HTML4 page, do I NEED to transform it
> into a valid XHTML page to be able to add GR markup as RDFa to it? Or just
> change the doctype and leave it up to the crawlers?
> >
> > I went through some of the sources (Google etc.) but none of them
> explicitly stated the importance of a valid XHTML markup. Does anybody have
> any experience wrt this matter?
> >
> > Thanks,
> >
> > Laszlo
> > _______________________________________________
> > goodrelations mailing list
> > goodrelations at ebusiness-unibw.org
> > http://ebusiness-unibw.org/cgi-bin/mailman/listinfo/goodrelations
>
>
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