Keyphrases
- xml schema
- xml documents
- regular expressions
- integrity constraints
- data exchange
- object oriented
- conceptual model
- relational schema
- xml data
- semi structured documents
- relational databases
- markup language
- metadata
- building blocks
- relational model
- data warehouse
- knowledge discovery
- domain knowledge
- schema mappings
- query processing
- context free grammars
- machine learning