Hi David:For properties, you can use multiple properties with the same literal values in RDFa if they really mean the same, afaik.
For classes, you should be a bit more careful and use the same URI (usually: hash URI) with multiple typeOf statements only if you are really confident that the two classes mean the same. If in doubt, rather check back with the authors of the respective ontologies. For instance, gr:BusinessEntity will have several compatible classes in other vocabularies, e.g. foaf:Person etc., while gr:ProductOrService and its subclasses require that you look a bit more careful on what you are describing. Also note that other vocabularies don't make the crucial distinction between a product and and offer of a product.
As for the Google vocab: I have not looked into it in much detail, because nobody except for Google is currently using it and it was said to be a first quick design only anyway.
To be on the safe side, rather use a bit of additional mark-up and keep the two sets of assertions separate.
The principle of using multiple vocabularies in combination with GoodRelations is shown here
http://www.ebusiness-unibw.org/wiki/GoodRelations_and_Yahoo_SearchMonkey Best Martin David Navarro Arnao wrote:
Thanks Manu, Martin for your comments.Martin, I know GoodRelations vocabulary I think is better than Google's one. I will use it in next step.Are there information/examples in your links to work with both vocabularies at same time?.Best regards, David Navarro. Martin Hepp (UniBW) escribió:Dear David: >Hi,> I've published a little web with products (or services) in RDFa. The>page is in spanish and it offers musical services for wedding or other >kind of music events.> Products are described following Google instructions, and next step>will be Yahoo complaint. > Any comment will be appreciate. > David. I would suggest that you look at the GoodRelations vocabulary and patterns at http://www.ebusiness-unibw.org/wiki/GoodRelations_and_Yahoo_SearchMonkey and http://www.ebusiness-unibw.org/wiki/Rdfa4google GoodRelations is much more powerful than the vocabulary you are currently using. The mark-up will be a bit longer, but the details of your offers will be much more visible for specific searches, and latest generation recommender engines will honor your meta-data. See also http://www.ebusiness-unibw.org/wiki/GoodRelations#Recipes_and_Examples for a growing list of recipes and examples and http://www.ebusiness-unibw.org/wiki/GoodRelations for the general developer's wiki. GoodRelations is supported by Yahoo SearchMonkey, BestBuy, Openlink Software, Smart Information Systems, and many others. If you are using existing shop software like osCommerce, Oxid eSales, or Joomla/Virtuemart, there are extensions available that automatically create respective RDFa: http://www.ebusiness-unibw.org/wiki/GoodRelations#Applications If you have feeds for Google Shopping, you can automatically convert them using the Google Feeds Converter at: http://www.ebusiness-unibw.org/tools/google-product-feed-converter/ An overview Webcast is at http://www.heppnetz.de/projects/goodrelations/webcast/ A recent talk on "Product Variety, Consumer Preferences, and Web Technology: Can the Web of Data Reduce Price Competition and Increase Customer Satisfaction?" is available at http://tr.im/z7hQ orhttp://www.ebusiness-unibw.org/wiki/GoodRelations#Selected_Talks_and_PresentationsBest wishes Martin Hepp [1]: http://www.unregalomusical.com/sugerencias.html [2]: (RDF validated)http://www.w3.org/RDF/Validator/ARPServlet?PARSE=Parse+URI%3A+&TRIPLES_AND_GRAPH=PRINT_TRIPLES&FORMAT=PNG_EMBED&URI=http%3A//www.w3.org/2007/08/pyRdfa/extract%3Furi%3Dhttp%3A//www.unregalomusical.com/sugerencias.html<http://www.w3.org/RDF/Validator/ARPServlet?PARSE=Parse+URI%3A+&TRIPLES_AND_GRAPH=PRINT_TRIPLES&FORMAT=PNG_EMBED&URI=http%3A//www.w3.org/2007/08/pyRdfa/extract%3Furi%3Dhttp%3A//www.unregalomusical.com/sugerencias.html>
-- -------------------------------------------------------------- martin hepp e-business & web science research group universitaet der bundeswehr muenchen e-mail: mh...@computer.org phone: +49-(0)89-6004-4217 fax: +49-(0)89-6004-4620 www: http://www.unibw.de/ebusiness/ (group) http://www.heppnetz.de/ (personal)skype: mfhepp twitter: mfhepp
Check out GoodRelations for E-Commerce on the Web of Linked Data! ================================================================= Webcast: http://www.heppnetz.de/projects/goodrelations/webcast/ Recipe for Yahoo SearchMonkey: http://tr.im/rAbNTalk at the Semantic Technology Conference 2009: "Semantic Web-based E-Commerce: The GoodRelations Ontology"
http://tinyurl.com/semtech-heppTalk at
Overview article on Semantic Universe: http://tinyurl.com/goodrelations-universe Project page: http://purl.org/goodrelations/ Resources for developers: http://www.ebusiness-unibw.org/wiki/GoodRelations Tutorial materials:CEC'09 2009 Tutorial: The Web of Data for E-Commerce: A Hands-on Introduction to the GoodRelations Ontology, RDFa, and Yahoo! SearchMonkey http://tr.im/grcec09
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