Keyphrases
- data model
- query language
- rdf data
- database systems
- relational model
- data integration
- databases
- data sources
- object oriented
- resource description framework
- data types
- database
- data modeling
- database management systems
- database design
- topic maps
- semi structured
- semistructured data
- relational algebra
- xml documents
- database integration
- xml data
- entity relationship
- object model
- sparql queries
- rdf graphs
- data sets
- conceptual model
- metadata
- schema evolution