Re: .htaccess a major bottleneck to Semantic Web adoption / Was: Re: RDFa vs RDF/XML and content negotiation

Discussion on this seems to have died down. I've tried to follow this thread but do not have enough SW and RDF knowledge to understand all that was said. But I'd like to learn by being able to publish RDF versions of knowledge in a way that is discoverable and usable by others in LOD fashion.

Could someone summarise this thread in a single (unbiased?) post, please? With the main points being: a) what is/are the blocks on LOD via RDF; b) how does RDFa help and what are its own failings; c) what are the recipes for making data discoverable, linkable and usable if i) one has full access to a server; ii) one has only user directory acccess to a server; iii) one does not know or care what a server is.

Many thanks, from me and I'm sure many others, to anyone who can satisfy these requests.


Tony Linde
Project Manager
Department of Physics & Astronomy
University of Leicester

From: "Martin Hepp (UniBW)" <>
Reply-To: <>
Date: Wed, 1 Jul 2009 16:51:15 +0100
To: Mark Birbeck <>
Cc: <>, semantic-web at W3C <>
Subject: Re: .htaccess a major bottleneck to Semantic Web adoption / Was:  Re:   RDFa vs RDF/XML and content negotiation

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...


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]



[1] <>

martin hepp
e-business & web science research group
universitaet der bundeswehr muenchen

phone:   +49-(0)89-6004-4217
fax:     +49-(0)89-6004-4620
www: (group) (personal)
skype:   mfhepp
twitter: mfhepp

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Received on Thursday, 2 July 2009 11:13:23 UTC