Semantic *web* - closed and open worlds
by Tim Berners-Lee

Table of contents

• Notation3 and the Semantic *Web* with cwm
• Diversion: GRDDL
• Extending RDF for rules: Motivation
• Extending RDF: Example
• Novelty: Formula
• Levels of N3
• Implementations
• Cwm: basic sem web tool
• Cwm is Open Source
• Builtins
• Semantic Web, provenance
• Explicitly closed world "not"
• Trusted system 1: crypto
• Trusted system 2: rule
• Example applications
• Other uses of formulae
• Diff format for remote update, CVS etc
• Labelled Graphs
• Issues from N3
• Breadcrumbs
• Cwm breadcrumb-following
• Some take-aways
• Next 6 months