Keyphrases
- data integration
- data sources
- query decomposition
- response time
- data exchange
- data integration systems
- databases
- query rewriting
- data model
- query plan
- data management
- global schema
- biological databases
- database
- data cleaning
- query answering
- data warehouse
- biological data
- scientific data management
- business intelligence
- data extraction
- data transformation
- schema matching
- data sets
- heterogeneous data
- schema mappings
- case study
- machine learning
- query execution
- query result
- query interface
- heterogeneous databases
- heterogeneous data sources
- information integration
- query evaluation
- user queries
- query processing
- information technology
- xml data sources