Keyphrases
- data complexity
- query answering
- multi modal
- answering queries
- data exchange
- query answers
- data sets
- np complete
- incomplete information
- data integration
- natural language
- data analysis
- data sources
- data mining
- knowledge representation
- knowledge discovery
- multiple modalities
- metadata
- databases
- data processing
- query processing
- xml documents
- high dimensional
- database systems
- multimedia
- machine learning