Completeness Statements about RDF Data Sources and Their Use for Query Answering.
Fariz DarariWerner NuttGiuseppe PirròSimon RazniewskiPublished in: ISWC (1) (2013)
Keyphrases
- query answering
- data sources
- data integration
- data integration systems
- data exchange
- linked data
- data model
- answering queries
- data warehouse
- databases
- conjunctive queries
- integrity constraints
- query rewriting
- information integration
- data complexity
- structured data
- schema mappings
- rdf data
- deep web
- heterogeneous data
- data quality
- natural language
- xml data exchange
- heterogeneous data sources
- incomplete information
- domain ontology
- database schema
- relational databases
- knowledge base
- semantic heterogeneity
- data sets
- inconsistent databases
- relational algebra
- datalog programs
- query containment
- query answers
- query relaxation