Keyphrases
- information retrieval
- information retrieval systems
- retrieval systems
- image database
- database machine
- control flow
- source code
- document level
- levels of abstraction
- data flow
- retrieval model
- document retrieval
- data sets
- metadata
- query expansion
- test collection
- software engineering
- relevance feedback
- probabilistic model
- digital libraries
- case study
- web services
- graph transformation