Keyphrases
- semantic constraints
- relational schema
- xml schema
- xml data
- relational data
- entity relationship
- xml documents
- relational databases
- functional dependencies
- conceptual schema
- semantic query optimization
- data model
- database schema
- semantic representation
- normal form
- object oriented
- schema mappings
- relational database systems
- relational model
- fuzzy relations
- transformation rules
- semantic knowledge
- semistructured data
- data exchange
- integrity constraints
- xpath queries
- databases
- database
- noun phrases
- path expressions
- data storage
- object oriented databases
- data integration
- domain knowledge
- reverse engineering
- conceptual modeling
- semantic information
- data warehouse