XML and RDF syntax constructs that associate short prefix identifiers with full namespace URIs, enabling the use of qualified names (QNames) to abbreviate long IRIs into human-readable yet machine-processable references in semantic web documents.
Semantic Classification
Content
Technical Details
- Declared using xmlns:prefix syntax in XML documents
- RDF namespace IRI: http://www.w3.org/1999/02/22-rdf-syntax-ns#
- QNames consist of namespace prefix and local name
- Prefixed Names (PNames) extend QNames with more flexible abbreviation
- INamespaceMapper interface manages prefix-to-URI mappings
Standard Namespaces
- rdf: for RDF syntax elements
- rdfs: for RDF Schema vocabulary
- owl: for OWL ontology language
- xsd: for XML Schema datatypes
- Custom namespaces for domain-specific vocabularies