grddl

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== Introduction ==
== Introduction ==
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GRDDL (pronounced "''griddle''") is a mechanism for '''G'''leaning '''R'''esource '''D'''escriptions from '''D'''ialects of '''L'''anguages. It is a technique for obtaining RDF data from XML documents and in particular XHTML pages. GRDDL transformations can be made for almost any dialect, including microformats.
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'''GRDDL''' (pronounced "''griddle''") is a mechanism for '''G'''leaning '''R'''esource '''D'''escriptions from '''D'''ialects of '''L'''anguages. It is a technique for obtaining RDF data from XML documents and in particular XHTML pages. GRDDL transformations can be made for almost any dialect, including microformats.
==Implementations==
==Implementations==
* [http://www.w3.org/2007/08/grddl/ W3C GRDDL Service]
* [http://www.w3.org/2007/08/grddl/ W3C GRDDL Service]
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* Triplr - construct URL as <nowiki>http://triplr.org/rdf/example.com/page.htm</nowiki>
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== Profiles ==
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* [http://tommorris.org/profiles/votelinks Vote-Links] (dead!)
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== Transformations ==
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;hCalendar
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*<nowiki>http://www.w3.org/2002/12/cal/glean-hcal.xsl</nowiki>
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;hCard
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*<nowiki>http://www.w3.org/2006/vcard/hcard2rdf.xsl</nowiki>
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*<nowiki>http://norman.walsh.name/2005/12/12/examples/hcard2rdf.xsl</nowiki>
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;vote-links
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*<nowiki>http://rdf.opiumfield.com/vote/votelinks.xsl</nowiki>
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==Issues==
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* Is GRDDL in HTML 4.01 OK, or is it just for XHTML?
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** Surely parsers can convert valid HTML4.01 to XHTML, perhaps using HTML-Tidy, before parsing it?
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*** The specification states that it is intended for XML and XHTML, but 'profile' is in the HTML4 specification. Parsers can implement Tidy or other conversion routines, but do not have to. --[[User:TomMorris|TomMorris]] 03:49, 13 Oct 2007 (PDT)
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**** Restricting GRDDL to XHTML would seem to be unnecessarily limiting. [[User:AndyMabbett|Andy Mabbett]] 04:00, 13 Oct 2007 (PDT)
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** See [http://microformats.org/discuss/mail/microformats-discuss/2007-September/010788.html mailing list post, 2007-09-27]
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=== Essentially dead ===
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<div class="discussion">
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* As someone who was an early proponent of GRDDL, I'd state that as of 2015-03, it is essentially dead along with any [[profile]]-based metadata systems including [[xmdp]]. The GRDDL specification relies on the profile attribute which has been deprecated in HTML5. Evidence to that effect: the [http://www.w3.org/2007/08/grddl/ W3C GRDDL reference service] is offline, no attempt has been made to build an alternative that is HTML5-compliant (such as implementing [[html5-profile]]). It is probably time to call time of death on GRDDL and [[profile-uris]]. —[[User:TomMorris|Tom Morris]] 16:51, 16 March 2015 (UTC)
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</div>
== References ==
== References ==
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== Further reading ==
== Further reading ==
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*[http://www.w3.org/2007/07/grddl-pressrelease W3C's GRDDL Press Release]
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* [http://www-sop.inria.fr/acacia/personnel/Fabien.Gandon/tmp/grddl/grddl-introduction-v3/ Bootstrapping the Semantic Web with GRDDL, Microformats, and RDFa] (tutorial)
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*&hellip;
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* [http://www.w3.org/2007/07/grddl-pressrelease W3C's GRDDL Press Release]
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* &hellip;
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=== Criticisms ===
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* 2007-07-29 - [http://semwebdev.keithalexander.co.uk/blog/posts/microformats-not-semantic-web Microformats aren't an answer to the Semantic Web]
== See also ==
== See also ==
*&hellip;
*&hellip;

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GRDDL

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Introduction

GRDDL (pronounced "griddle") is a mechanism for Gleaning Resource Descriptions from Dialects of Languages. It is a technique for obtaining RDF data from XML documents and in particular XHTML pages. GRDDL transformations can be made for almost any dialect, including microformats.

Implementations

Profiles

Transformations

hCalendar
hCard
vote-links

Issues

Essentially dead

  • As someone who was an early proponent of GRDDL, I'd state that as of 2015-03, it is essentially dead along with any profile-based metadata systems including xmdp. The GRDDL specification relies on the profile attribute which has been deprecated in HTML5. Evidence to that effect: the W3C GRDDL reference service is offline, no attempt has been made to build an alternative that is HTML5-compliant (such as implementing html5-profile). It is probably time to call time of death on GRDDL and profile-uris. —Tom Morris 16:51, 16 March 2015 (UTC)

References

Further reading

Criticisms

See also

grddl was last modified: Monday, March 16th, 2015

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