Keyphrases
- xml schema
- type checking
- xml documents
- data types
- data exchange
- regular expressions
- xml data
- integrity constraints
- query processor
- relational databases
- relational calculus
- object oriented
- relational schema
- relational model
- xml queries
- metadata
- conceptual model
- object model
- abstract data types
- relational algebra
- building blocks
- query processing
- databases
- data streams
- efficient query processing
- semantic information
- co occurrence
- data model