RDF Resource Description Framework
  - Web evolution: from machine-readable and human-understandable to
    machine-understandable data
    
      - Automated processing of Web resources
- examples: search engines, cataloging, expressing privacy
        preferences...
 
- Mechanism for describing resources about any domain
- Application neutral
- Metadata: "data about data"
- Describing relationships among resources in terms of named properties
    and values.
- RDF information model: graph structure describing resources and
    properties
- XML syntax for encoding and transporting  metadata