GoodRelations - The Web Vocabulary for E-Commerce

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GoodRelations is a standardized vocabulary for product, price, and company data that can (1) be embedded into existing static and dynamic Web pages and that (2) can be processed by other computers. This increases the visibility of your products and services in the latest generation of search engines, recommender systems, and other novel applications.

[goodrelations] GoodRelations in RDFa: HTML or XHTML?

Irene Celino irene.celino at
Mon Mar 28 11:28:38 CEST 2011

Hi László,
RDFa was originally designed for XHTML only. They are now discussing
ways to embed RDFa in other markup like HTML5; not sure about HTML4.
You can have a look at the RDFa working group wiki [1] or directly ask
to the RDFa mailing list [2].



Irene Celino
CEFRIEL - ICT Institute Politecnico di Milano
Via Fucini, 2 - 20133 Milano (Italy)
phone: +39 0223954266
fax: +39 0223954466
email: Irene.Celino at, irene at

2011/3/28 László Török <ltorokjr at>:
> 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


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