Keyphrases
- xml documents
- xml data
- markup language
- xml queries
- natural language
- xml format
- databases
- xml schema
- xml databases
- context free grammars
- semi structured data
- relational databases
- metadata
- grammatical inference
- data integration
- data model
- xml retrieval
- data transformation
- context free
- data representation
- topic maps
- keyword search
- relational data
- data exchange
- object oriented
- machine learning
- context dependent
- database
- xpath queries
- structured data
- visual languages
- tree grammars