Keyphrases
- xml schema
- conceptual model
- schema mappings
- relational schema
- xml documents
- data exchange
- regular expressions
- semantic information
- xml data
- integrity constraints
- conceptual schema
- relational databases
- object oriented
- relational model
- markup language
- definition language
- semi structured documents
- data model
- metadata
- query processing
- information retrieval
- database
- wordnet
- knowledge acquisition
- data warehouse
- keywords
- knowledge base