Semantic Web

CoABS PI Meeting
Chantilly, VA
17 January 2002

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Outline

support World Wide Web (WWW) content that is easily used by intelligent agents and other programs
enable the Semantic Web
- Scientific American article (vision)
- WebOnt Charter (technical issues)

create a linked object web
- described by (many) ontologies
- static and dynamic content, including Web Services
define an ontology language with a formal foundation
- DAML+OIL product of both DARPA and EU-funded Semantic Web research teams
leverage existing WWW standards and protocols
support a range of consumers:
- simple programs (e.g. Visual Basic)
- intelligent agents (reasoning/inference)
- humans
develop prototype tools to span the Semantic Web lifecycle:
- ontology creation and editing
- ontology translation and mapping
- distributed knowledge bases
- markup editors
- validation services
- translation services
- APIs
- browsers
- security/trust
- ...
- applications

levels of detail

most organizations already have a good start toward developing ontologies

a notional Mark 2002 sensor that can be used in fixed locations or attached to a platform (aircraft, UAV, etc.)
show object links
- event to sensor
- sensor to sensor characteristics
- data to metadata
- adding information
- statements about statements (pedigree)

17 months into a 3 year DARPA program
Murray Burke is now Program Manager
DAML+OIL language stable since March 2001
- submitted to W3C
40+ DAML+OIL tools
- includes work by EU and other collaborators
- mostly open source
DAML Ontology Library: 170 ontologies
DAML Crawler: 2.8 million statements from 48 public sites
DAML Applications: ~12 end-to-end applications of varying scale