Keyphrases
- rdf data
- markup language
- data model
- metadata
- xml format
- query engine
- data sources
- database
- keyword search
- inference control
- xml documents
- topic maps
- xml data
- sparql queries
- xpath queries
- spatial queries
- semistructured data
- databases
- relational data
- semantic query
- spatial proximity
- query processing
- data integration
- query evaluation
- xml query processing
- query language
- xml schema
- rdf graphs
- path queries
- xml databases
- data retrieval
- spatial data
- user queries
- response time
- semantic web
- query language for xml
- database objects
- query result
- spatial information
- linked data
- range queries
- query patterns
- xml query languages
- ranked retrieval
- query optimization
- storage and retrieval
- query formulation
- data exchange
- database systems