Keyphrases
- xml data
- xml keys
- xml documents
- approximate query answering
- query optimization
- xml databases
- data model
- xml queries
- relational databases
- query processing
- query language
- relational data
- xml schema
- keyword search
- xpath queries
- semi structured data
- querying xml data
- query evaluation
- query decomposition
- relational and xml data
- labeling scheme
- data mining
- web mining
- itemsets
- xml query processing
- text mining
- knowledge discovery
- data management
- frequent itemsets
- frequent patterns
- object oriented database systems
- object oriented
- path expressions
- native xml databases
- xml data sources
- database systems