Keyphrases
- content and structure
- xml trees
- retrieval systems
- structured documents
- xpath expressions
- xpath queries
- xml documents
- xml data
- xml format
- semi structured documents
- user queries
- xml retrieval
- query terms
- document structure
- database
- xml elements
- ranked retrieval
- information retrieval systems
- query processing
- document centric
- xml databases
- query language
- xml queries
- query evaluation
- extensible markup language
- document retrieval
- relevant documents
- trec web
- information retrieval
- inverted index
- databases
- relational database systems
- data model
- xml schema
- xml query languages
- focused retrieval
- retrieval strategies
- path expressions
- data sources
- xml fragments
- relational databases
- query result
- xml ir
- markup language
- web documents
- xml query processing
- language model
- query specific
- efficient processing
- relevance ranking
- document images
- web search engines
- query patterns
- native xml databases
- document clustering
- document repository
- update operations
- keyword queries
- result set
- metadata
- search engine
- keywords
- relevant content
- query expansion
- database objects
- query optimization
- labeling scheme
- semi structured data
- text documents
- semi structured
- query interface
- keyword search