Keyphrases
- retrieval systems
- user queries
- xml trees
- structured documents
- query terms
- trec web
- information retrieval systems
- ad hoc retrieval
- document collections
- query language
- tree patterns
- query processing
- response time
- binary tree
- information retrieval
- inverted index
- retrieval strategies
- query specific
- decision trees
- web search engines
- range queries
- retrieval quality
- binary trees
- web retrieval
- document images
- relevant documents
- database
- query logs
- tree structure
- wikipedia articles
- compound words
- result lists
- content and structure
- relevant content
- query words
- search engine
- short list
- document identifiers
- xml documents
- web search
- web documents
- retrieved documents
- efficient processing