Keyphrases
- object databases
- xml data
- relational databases
- relational database systems
- xml documents
- data model
- xml queries
- xml databases
- object model
- database systems
- relational and xml data
- query language
- semi structured data
- databases
- xml schema
- schema evolution
- query processing
- query decomposition
- database technology
- object oriented
- relational model
- xpath queries
- normal form
- querying xml data
- database
- database schema
- path expressions
- data exchange
- labeling scheme
- functional dependencies
- metadata