Keyphrases
- xml documents
- xml data
- structured data
- xml queries
- relational databases
- data model
- querying xml documents
- integrity constraints
- relational data
- xml schema
- semantic information
- xml databases
- lower dimensional
- sql queries
- semi structured data
- structured documents
- document type
- keyword search
- databases
- xml information retrieval
- bitmap indexing
- labeling scheme
- information retrieval systems
- data mining
- neural network