Second Generation: Meta-Data Protocols

Meta-data protocols allows one to provide "data about data" (Web resources).

Platform for Internet Content Selection (PICS)

• an assertion system
• multiple "rating" systems (referred to as assertion systems, schemas, vocabularies, or grammars)
• multiple distribution mechanisms, including third party!

The W3C is developing the next generation of meta-data protocol (PICS-NG/ XML)

Joseph M. Reagle Jr.