Containment of Expressive SPARQL Navigational Queries.
Melisachew Wudage ChekolGiuseppe PirròPublished in: ISWC (1) (2016)
Keyphrases
- query language
- query evaluation
- sparql queries
- rdf data
- query engine
- query processing
- query optimization
- query containment
- conjunctive queries
- xquery full text
- datalog queries
- response time
- web search engines
- linked data
- data model
- tree patterns
- data sources
- retrieval systems
- expressive power
- range queries
- database
- database queries
- efficient processing
- search queries
- search engine
- relational queries
- query formulation
- containment of conjunctive queries
- unions of conjunctive queries
- regular path queries
- set valued attributes
- query logs
- storage and retrieval
- relational algebra
- regular expressions
- data exchange
- user queries
- structured data
- relevance feedback
- databases