Keyphrases
- xml schema
- xml documents
- conceptual model
- regular expressions
- extensible markup language
- relational databases
- data exchange
- xml data
- xml queries
- object oriented
- integrity constraints
- data interchange
- xpath expressions
- relational schema
- markup language
- natural language
- building blocks
- metadata
- definition language
- machine learning
- domain specific
- schema mappings
- data model
- relational model
- xml query languages
- information retrieval
- semi structured documents
- general purpose
- query processing
- data sets