XML Hacks by Fitzgerald Michael

Author:Fitzgerald, Michael [Michael Fitzgerald]
Language: eng
Format: epub
Tags: COMPUTERS / Programming Languages / XML
ISBN: 9781449397753
Publisher: O'Reilly Media
Published: 2010-10-14T16:00:00+00:00

See Also

For a more thorough introduction to SOAP, read the SOAP v1.2 primer (Part 0): http://www.w3.org/TR/soap12-part0/

SOAP v1.2 messaging framework (Part 1), including information on the SOAP processing model and message constructs: http://www.w3.org/TR/soap12-part1/

SOAP v1.2 adjuncts (Part 2), including information on the SOAP data model, encoding, and HTTP binding: http://www.w3.org/TR/soap12-part2/

Hack #64. Identify Yourself with FOAF

FOAF provides a framework for creating and publishing personal information in a machine-readable fashion. As you learn FOAF, you will also get acquainted in a practical way with RDF.

The Friend of a Friend or FOAF project (http://www.foaf-project.org/) is a community-driven effort to define an RDF vocabulary for expressing metadata about people and their interests, relationships, and activities. Founded by Dan Brickley and Libby Miller, the FOAF project is an open, community-led initiative that is tackling head-on a small and relatively manageable piece of the W3C’s wider Semantic Web goal of creating a machine-processable web of data. Achieving this goal quickly requires a network effect that will rapidly yield a mass of data. Network effects mean people. It seems a fairly safe bet that any early Semantic Web successes are going to be riding on the back of people-centric applications. Indeed, everything interesting that we might want to describe on the Semantic Web was arguably created by or involves people in some form or another. And FOAF is all about people.

FOAF facilitates the creation of the Semantic Web equivalent of the archetypal personal homepage: my name is Leigh, this is a picture of me, I’m interested in XML, and here are some links to my friends. And just like the HTML version, FOAF documents can be linked together to form a web of data, with well-defined semantics.

Being a W3C Resource Description Framework (RDF) application (http://www.w3.org/RDF/) means that FOAF can claim the usual benefits of being easily harvested and aggregated. And like all RDF vocabularies, it can be easily combined with other vocabularies, allowing the capture of a very rich set of metadata. This hack introduces the basic terms of the FOAF vocabulary, illustrating them with a number of examples. The hack concludes with a brief review of the more interesting FOAF applications and considers some other uses for the data.

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