- From: Martin Hepp (UniBW) <martin.hepp@ebusiness-unibw.org>
- Date: Wed, 01 Jul 2009 17:51:15 +0200
- To: Mark Birbeck <mark.birbeck@webbackplane.com>
- CC: public-lod@w3.org, semantic-web at W3C <semantic-web@w3c.org>
- Message-ID: <4A4B85F3.9050307@ebusiness-unibw.org>
Dear all: Fyi - I am in contact with Google as for the clarification of what kind of empty div/span elements are considered acceptable in the context of RDFa. It may take a few days to get an official statement. Just so that you know it is being taken care of... Martin Mark Birbeck wrote: > Hi Martin, > > >> b) download RDFa snippet that just represents the RDF/XML content (i.e. such >> that it does not have to be consolidated with the "presentation level" part >> of the Web page. >> > > By coincidence, I just read this: > > Hidden div's -- don't do it! > It can be tempting to add all the content relevant for a rich snippet > in one place on the page, mark it up, and then hide the entire block > of text using CSS or other techniques. Don't do this! Mark up the > content where it already exists. Google will not show content from > hidden div's in Rich Snippets, and worse, this can be considered > cloaking by Google's spam detection systems. [1] > > Regards, > > Mark > > [1] <http://knol.google.com/k/google-rich-snippets/google-rich-snippets/32la2chf8l79m/1#> > > -- -------------------------------------------------------------- martin hepp e-business & web science research group universitaet der bundeswehr muenchen e-mail: mhepp@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 the GoodRelations vocabulary for E-Commerce on the Web of Data! ======================================================================== Webcast: http://www.heppnetz.de/projects/goodrelations/webcast/ Talk at the Semantic Technology Conference 2009: "Semantic Web-based E-Commerce: The GoodRelations Ontology" http://tinyurl.com/semtech-hepp Tool for registering your business: http://www.ebusiness-unibw.org/tools/goodrelations-annotator/ Overview article on Semantic Universe: http://tinyurl.com/goodrelations-universe Project page and resources for developers: http://purl.org/goodrelations/ Tutorial materials: Tutorial at ESWC 2009: The Web of Data for E-Commerce in One Day: A Hands-on Introduction to the GoodRelations Ontology, RDFa, and Yahoo! SearchMonkey http://www.ebusiness-unibw.org/wiki/GoodRelations_Tutorial_ESWC2009
Received on Wednesday, 1 July 2009 16:03:13 UTC