W3C has announced the launch of a new OWL Working Group, described in
a Charter effective September 6, 2007. Ian Horrocks (Oxford University)
and Alan Ruttenberg (ScienceCommons) chair the Working Group. The OWL
Web Ontology Language is playing an important role in an increasing
number and range of applications, and is the focus of research into
tools, reasoning techniques, formal foundations and language
extensions. The widespread use of OWL has revealed requirements for
language extensions that are needed in applications. At the same time,
research and development into reasoning techniques and practical
algorithms has made it possible to provide tool support for language
features that would not have been feasible at the time OWL was
published. The new OWL Working Group is chartered through July 2009
to produce a W3C Recommendation for an extended Web Ontology Language
(OWL), adding a small set of extensions, and defining profiles
identified by users and tool implementers. The extensions, referred
to as OWL 1.1, fall into the following categories: (1) Extensions to
the logic underlying OWL, adding new constructs that extend the
expressivity of OWL (e.g., qualified cardinality restrictions and
property chain inclusion axioms). (2) Extensions to the datatype
support provided by OWL, e.g., with XML Schema Datatype semantics
and datatype facets. (3) Additional syntactic facilities that do not
extend the expressive power of OWL but that make some common modelling
paradigms easier to express (e.g., disjoint unions). The Working
Group will also define a set of language fragments (profiles, or
subsets of the language) that have been identified as having
interesting or useful properties (e.g., being easier to implement).
Other deliverables may include an XML Exchange syntax for OWL 1.1,
with GRDDL enabled namespace document -- to be decided by the group
whether this document should go through the W3C Recommendation track
or would be published as a W3C Note. The WG may produce additional
outreach material aimed at easing the adoption of OWL 1.1 features
by OWL users and other members of the Semantic Web community.
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