Keyphrases
- data integration
- data sources
- global schema
- query processing and optimization
- data model
- data exchange
- query rewriting
- databases
- query answering
- data management
- query language
- data integration systems
- data warehouse
- query plan
- query processing
- information integration
- heterogeneous data
- data transformation
- answering queries
- schema mappings
- query evaluation
- data cleaning
- data warehousing
- data extraction
- ontology mapping
- heterogeneous data sources
- business intelligence
- database systems
- schema matching
- scientific data management
- query decomposition
- biological databases
- database
- water resources management
- complex queries
- user queries
- entity resolution
- query containment
- biological data
- structured data