Keyphrases
- xml data
- publish subscribe systems
- xml documents
- xml databases
- data model
- image retrieval
- query optimization
- relational databases
- query evaluation
- query language
- xml queries
- relational data
- semi structured data
- xml schema
- multimedia
- query processing
- relational and xml data
- xpath queries
- querying xml data
- relational database systems
- keyword search
- semi structured information
- xml query processing
- relevance feedback
- xml fragments
- databases
- queries on xml data
- information dissemination
- path expressions
- labeling scheme
- xml query languages
- object oriented
- recommender systems
- search engine