- Data integration
- Data-dependent agents
- Knowledge management
- Semantic indices and portals
- Administration of personal data
- Metadata for annotation
- Metadata for description, search and selection
- Metadata for media and content
- Knowledge generation
- Management of catalogues and thesauri
- Syndication
Source: "
Semantic
Web Applications - Analysis and Selection"
http://www.w3.org/2001/sw/Europe/reports/chosen_demos_rationale_report/hp-applications-selection.html