Keyphrases
- query processing
- user queries
- keywords
- rdf graphs
- answering queries
- approximate answers
- path queries
- rdf data
- query keywords
- query result
- query evaluation
- result set
- keyword queries
- aggregate queries
- sparql queries
- efficient processing
- complex queries
- range queries
- query language
- query terms
- response time
- query formulation
- search engine
- keyword search
- skyline queries
- relevant documents
- information retrieval systems
- database queries
- data management
- index structure
- database
- database systems
- semantic web
- linked data
- query execution
- query optimization
- query answering
- xml data
- cost model
- xml query processing
- web pages
- continuous queries
- xpath queries
- relational database systems
- data model
- web search engines
- user defined
- materialized views
- data sources