Keyphrases
- xml schema
- conceptual model
- schema mappings
- relational schema
- xml documents
- data exchange
- semantic information
- xml data
- regular expressions
- markup language
- conceptual schema
- relational databases
- integrity constraints
- semi structured documents
- metadata
- building blocks
- relational model
- formal semantics
- object oriented
- data integration
- data model
- source schema
- high level
- document type definitions
- relational database systems
- transformation rules
- query language
- data analysis
- information retrieval
- data interchange
- database