Table of Contents
- Dublin Core metadata (DC): Common superproperties for documents
- XML schema (XSD): Basic types definitions (int, double,...)
- Resource Description Framework (RDF): Core RDF classes to keep the internal consistency of the ontology
- Nepomuk Resource Language (NRL): Properties describing the ontologies.
- Nepomuk Annotation Ontology (NAO): Tags, ratings and other common annotations to all classes