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Further work is also needed on the explanatory text in this specification and on the FOAF website; progress towards this will be measured in the version number of future revisions to the FOAF specification.This revision stablises weblog, page, Document and Image and adds three owl:equivalent classes to - Person (Person), Image (Image Object), Document (Creative Work).A historical backlog of known technical issues is acknowledged, and available for discussion on the FOAF mailing list.Proposals for resolving these issues are welcomed, on foaf-dev.This specification describes the FOAF language, defined as a dictionary of named properties and classes using W3C's RDF technology.FOAF is a project devoted to linking people and information using the Web.For example, the W3C work on SPARQL provides us with a rich query language for consulting databases of FOAF data, while the SKOS initiative explores in more detail than FOAF the problem of describing topics, categories, "folksonomies" and subject hierarchies.
FOAF has been evolving gradually since its creation in mid-2000.
The FOAF RDF namespace URI, by contrast, is fixed and its identifier is not expected to change.
Furthermore, efforts are underway to ensure the long-term preservation of the FOAF namespace, its domain name and associated documentation.
Each FOAF document is itself an encoding of a descriptive network structure.
Although these documents do not always agree or tell the truth, they have the useful characteristic that they can be easily merged, allowing partial and decentralised descriptions to be combined in interesting ways.