GRDDL : Specs. released.

Content creation should not be recondite. It should not be this bizarre arcana that only experts and gold-plated computer science gurus can do.

—Brendan Eich, Innovators of the Net

GRDDL is a machanism for Gleaning Resource Descriptions from Dialects of Languages.It is a technique to obtain data from XML documents.The way in which GRDDL empowers authors of web content can be considered somewhat analogous to allowing a non-native speaker to learn the spoken form of a new language first, before attempting to master its written form – rather than trying to learn both simultaneously.

Future of web applications is changing rapidly.2006 is a year of loosely coupled netjungle(mashups) but advent of Semantic web will make shift towards WEB 3.0 and beyond.
Take a look at few examples explaning power of semnatic web adn GRDDL.

• Scheduling: Jane is trying to coordinate a meeting with friends.She uses GRDDL to extract data from each of their calendar pages and combine it in a single model.She then writes a query to filter the events down to those dates when all of them are in the same city.
• Healthcare: Kayode uses a single-purpose XML vocabulary as the main representation format for computer-based patient record. He uses GRDDL to be able to able to query these records both in their XML vocabulary and as RDF, without managing a dual representation.
• Buying experience: Stephan wishes to buy a guitar and visits a site offering a review service. He uses GRDDL to aggregate reviews and profiles of the reviewers in order to select the reviews he can trust.
• Global Library: Adeline designs a system to allow here company to streamline the publication of Technical Reports. The system relies on shared templates for publishing documents and a GRDDL transformation to build an up-to-date RDF index used to create an authoritative repository.
• Education: The Technical University of Marcilly decides to use a wiki with metadata embedded in its pages to tag, structure, navigate and query the resources of the wiki. GRDDL is used to extract these metadata as RDF to feed the different tools of the system.
• WEBAPPs: Voltaire has setup a weblog engine that utilizes XForms for editing entries. He also provides a GRDDL transformation that extracts an RDF description of the XForms that other client applications can use to update existing entries using the identified service URIs, and perform other such services.
• Open archive intiative: The Open Archives Initiative (OAI) publishes an XML schema that universities can use to publish their archived documents. This schema also identifies a GRDDL transform to apply to all its instance documents in order to extract their Creative Commons license.

Explore more about examples here.

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