Keyphrases
- memory efficient
- query processing
- xml data
- xml fragments
- labeling scheme
- data streams
- database systems
- xml keys
- xml documents
- data model
- markup language
- object oriented
- query optimization
- metadata
- processing queries
- xml databases
- data exchange
- keyword search
- active learning
- aggregate queries
- database
- search algorithm
- relational databases
- xml format
- iterative deepening
- multiple sequence alignment
- stream processing
- sliding window
- xml queries
- query execution
- data retrieval
- xml schema
- relational database systems
- cost model