Keyphrases
- xml views
- relational databases
- incremental maintenance
- relational data
- query rewriting
- xml documents
- data exchange
- xml data
- xml queries
- semi structured data
- xpath queries
- view update
- materialized views
- query answering
- binary data
- xml schema
- relational schema
- xml databases
- query optimization
- database
- structured data
- keyword search
- cost model
- relational database systems
- query evaluation
- np complete