So, yesterday it became reality ;) XHTML+RDFa is finally a W3C Candidate Recommendation (CR) - more details available from the W3C news page.
In case you have an RDFa implementation ready, please let us know.
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Content
RDFa is Candidate Recommendation
RDFa Wiki available
http://rdfa.info/wiki/RDFa_Wiki is online - check it out! Many thanks to Ben and CC ;)
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The Semantic Web Command Line
Ever have wondered if there is something around like a command line for the Semantic Web? An online tool that allows you load and query a range of data sources? Well, peradventure Benjamin Nowack has developed a tool, called SPARQLBot, that does all this. It is really great. You launch your favourite IRC client (I use Hydra IRC) and then you (or a SPARQL geek near to you) defines a command that does something useful. Pull in some data, query it, smush it, etc.
Check it out! Play around with it. Experience how to instant-integrate data source on an RDF-basis. You will enjoy it. An example may better illustrate it: Imagine you've joined the #sparqlbot channel at irc:irc.freenode.net; you query for news (from an RSS channel):
mhausenblas>sparqlbot, load <FEEDURI>mhausenblas>sparqlbot, news about XXX
What happens in the background is that the feed gets loaded into the store, and the command triggers a SPARQL query:
SELECT DISTINCT ?item ?o WHERE {
?item a rss:item ; ?p ?o .
FILTER REGEX(?o, "$1", "i")
}
Isn't that great? I experienced it today. It really rocks :) You can add your own commands (given some basic SPARQL knowledge) and extend the bot's intelligence. Not to mention that this nice tool (being based on ARC2) even understands RDFa - very nice, indeed (try also the 'sw faq command'). However, the name SPARQLBot is to modest, IMHO. It is THE Semantic Web command line!
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riese launched!
So finally we did it: Today we released the alpha version of riese, the 'RDFizing and Interlinking the EuroStat Data Set Effort'. Deploying linked-data using XHTML+RDFa is quite a new idea. We combined it with what we call User Contributed Interlinking, i.e. let user add semantic links in a Wiki-style manner. Check it out!
Btw, thanks Danny for your nice post on riese :)
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A great RDFa video tutorial ...
... by Manu Sporny (CEO Digital Bazaar, Inc.), available at YouTube: RDFa Basics. Thanks a lot!
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Cool RDFa Tutorial
Fabien, you're simply the best: Your RDFa tutorial rocks!
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RDFa news
As Mark pointed it out on his blog: RDFa is about to lift-off! Quick links:
- The RDFa Primer, and
- The RDFa Syntax
Take a look at it and start playing around ;)
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An RDFa browser
Did you know that the Zitgist RDF browser actually supports RDFa? This is to say you can feed the browser with XHTML+RDFa (see example) and it will render it!
Ok. It has some minor hiccups (seems to duplicate each prop) ... but hey ... it's a start.
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RDFa-deployed Multimedia Metadata (ramm.x)
The RDFa-deployed Multimedia Metadata (ramm.x) activity has been launched:
With ramm.x we aim at enabling existing multimedia metadata formats to enter the Semantic Web [...] ramm.x targets at self-descriptive media asset descriptions allowing to apply the follow-your-nose principle.
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RDFa applications
Two new RDFa applications are available:
- Ben has announced a new Bookmarklets and RDFa Web Clipboard;
- I've put an alpha version of a FOAF-RDFa generator, called FOAFr, online.
Check it out ;)
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RDFa news
Mark Birbek explains how to use RDFa in XHTML 1 - STOP - The RDFa specification (incl. Primer, Syntax, Use Cases, and Test Suite) is on its way - STOP - Bob DuCharme has a nice article that introduces RDFa step by step - STOP - Benjamin Nowack wrote a form-based, semi-automatic comparison matrix for RDFa, eRDF and microformats.
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W3C: Questionnaire on JavaScript-RDF APIs
W3C prepares for Scripting for the Semantic Web:
The W3C Semantic Web Activity is considering whether to propose further work specifying a standard Applications Programming Interface (API) for people writing Semantic Web applications in Javascript running in browsers. Before engaging, possibly, in drafting a charter to be then submitted to W3C members, W3C would like to solicit input from the developers' community. An interactive questionnaire was therefore set up at:
http://www.w3.org/2002/09/wbs/1/semweb-js-api/
to collect community input. W3C would appreciate if interested developers filled the questionnaire to promote consensus on this issue.
BTW: The 3rd Workshop on Scripting for the Semantic Web is colocated with ESWC 2007. June 6 or 7, 2007 Innsbruck, Austria.
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RDF in HTML and Microformats
When Seth states that "[...] Microformats have succeeded here, allowing me to very easily embed metadata into XHTML.", I'd like to reply: You can virtually embed RDF into (X)HTML using RDFa; just as easy as that + you get: multiple Vocs in one place via namespaces, one-tool-for-all-formats, etc.
Want to try out? Go have a look at RDFa bookmarklets.
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RDFa Use Cases
In the W3C RDF-in-HTML task force, we now establish use cases for RDFa.
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