Keyphrases
- xml query languages
- query language
- xml data
- query rewriting
- data model
- xpath queries
- xml documents
- xml queries
- conjunctive queries
- query evaluation
- database
- metadata
- semistructured data
- path expressions
- ranked retrieval
- query processing
- query result
- semi structured data
- relational databases
- topic maps
- databases
- data integration
- native xml databases
- data collections
- update operations
- database objects
- regular expressions
- relational database systems
- keyword search
- xml databases
- user queries
- rewriting rules
- data repositories
- data sources
- content and structure
- aggregate queries
- queries using views
- xpath expressions
- markup language
- digital libraries
- web search engines
- query optimization
- semi structured
- range queries
- xml schema
- sql queries
- efficient processing
- relational algebra
- query patterns
- xml trees
- heterogeneous data sources
- complex queries
- keyword queries
- regular path queries
- xml query processing
- source code
- xml retrieval
- search engine