Keyphrases
- functional dependencies
- xml documents
- relational databases
- normal form
- integrity constraints
- relational model
- database schemes
- xml data
- structured data
- data dependencies
- data model
- universal relation
- conflict free
- xml schema
- xml databases
- xml queries
- relational data
- database schema
- logical implication
- inclusion dependencies
- semi structured data
- approximate functional dependencies
- sql queries
- object oriented
- xpath queries
- xml elements
- entity relationship
- information content
- set of functional dependencies
- horn theories
- data structure