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.
Health Care
Kayode wants to query clinical data.
Kayode uses a single-purpose XML vocabulary as the main representation format for a computer-based
patient record. He uses GRDDL to be able to query these records both in their XML vocabulary
and as RDF, without managing a dual representation.
Aggregating data
Stephan wants a synthetic review before buying a guitar.
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.
Querying sites and digital libraries
DC4Plus Corp. wants to automate the publication of its electronic documents.
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..
Wikis and e-learning
The Technical University of Marcilly decided to use wikis to foster knowledge exchanges between lecturers and students.
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.
Web syndication
Extracting form descriptions to push entries to Voltaire's blog.
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.
Validated Documents
the OAI would like to be able to specify document licenses in the schema they share.
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.
Pulling Data from the Web
Steffen wants to build a directory of the people he works with.
Whenever he gets in touch with someone, Steffen starts a simple script that aims at gathering as
much metadata about this person as possible. Because most of these web pages are not even valid
HTML, the script calls an HTML-tidying tool and if the tidying is complex some of the metadata
is likely to be no longer coherent.
Pushing a transformation
Oceanic Consortium wants to provide transformations for their files without altering them or their schema.
Oceanic wishes to also publish RDF descriptions of their parts reusing the AirPartML documents
produced for an arrangement with a consortium of airlines. The AirPartML schemas are strict and
therefore Oceanic cannot alter their XML documents to specify a transformation.
Yet using the HTTP Headers, Oceanic can specify link and profiles for transformation when
serving their AirPartML documents.
