Keyphrases
- heterogeneous data sources
- data model
- data integration
- data sources
- query decomposition
- database systems
- databases
- query language
- semantic integration
- multiple data sources
- query processor
- heterogeneous data
- global view
- data exchange
- database management systems
- semantic heterogeneity
- object oriented
- database
- schema matching
- data warehouse
- schema mappings
- information integration
- structured data
- semi structured
- xml data
- data management
- xml documents
- relational databases
- object model
- multidatabase systems
- query optimization
- information sources
- information systems
- data sets