Keyphrases
- online learning
- database
- tree patterns
- query processing
- tree structures
- query language
- web search engines
- efficient processing
- query evaluation
- tree structure
- response time
- user queries
- real time
- databases
- index structure
- web search
- data sources
- search queries
- complex queries
- relevance judgments
- data model
- relational databases
- query patterns
- indexing schemes
- tree nodes