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GoodRelations - The Web Vocabulary for E-Commerce

This is the archive of the goodrelations dicussion list

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] Using GoodRelations for Google AND Yahoo AND the Semantic Web

Martin Hepp martin.hepp at ebusiness-unibw.org
Mon Jun 6 18:40:35 CEST 2011

Dear all:

While updating the GoodRelations test-cases at


which we normally use to monitor their validators, I found many examples of

1. using GoodRelations for both Yahoo and Google and
2. using extensions for specific verticals, e.g. http://purl.org/vso/ns.html for the auto industry, while still validating with Google AND Yahoo.

This shows that, internally, they can handle way more of RDFa and GoodRelations than publicly advertised to developers.

So when you want to publish rich data to please both search engines, mobile applications, and browser extensions, GoodRelations in RDFa is currently the best choice.

The only fundamental difference between Google's and Yahoo's recommendation for using GoodRelations is the markup for review data; they use two different vocabularies. But thanks to RDFa's flexibility, you can still use a single block of markup:

<div xmlns:review="http://purl.org/stuff/rev#"
	 <br />Product Reviews:
	 <div rel="review:hasReview v:hasReview">
	   <span typeof="v:Review-aggregate review:Review">
		 <br />Average:
		 <span property="review:rating v:rating" datatype="xsd:float">4.5</span>, lowest:
		 <span property="review:minRating" datatype="xsd:integer">0</span>, highest:
		 <span property="review:maxRating" datatype="xsd:integer">5</span> (total number of reviews:
		 <span property="review:totalRatings v:count" datatype="xsd:integer">45</span>)<br />

Best wishes

Martin Hepp

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