Describing and Utilizing Constraints to Answer Queries in Data-Integration Systems.
Chen LiPublished in: IIWeb (2003)
Keyphrases
- data integration systems
- query answering
- answering queries
- data sources
- query rewriting
- regular path queries
- query answers
- data integration
- query containment
- schema mappings
- consistent answers
- query processing
- query interface
- data exchange
- integrity constraints
- web search engines
- query language
- query result
- relational databases
- database
- databases
- data complexity
- global schema
- heterogeneous data
- conjunctive queries
- complex queries
- database queries
- information integration
- incomplete information
- response time
- data model
- data sets
- graph databases
- semistructured data
- xpath queries
- regular expressions
- structured data
- data warehouse
- database systems