Keyphrases
- integrity constraints
- xml documents
- xml schema
- xml data
- xml databases
- xml queries
- xpath queries
- markup language
- data model
- structured data
- keyword search
- data integration
- data transformation
- data representation
- xml format
- data exchange
- extensible markup language
- database
- chinese characters
- document centric
- semistructured data
- document structure
- collaborative writing
- concurrent programming
- xml query languages
- relational database systems
- path expressions
- labeling scheme
- object oriented databases
- metadata
- e learning
- neural network
- databases