Keyphrases
- geographic information retrieval
- knowledge base
- geographic information
- document collections
- cross language
- expert systems
- knowledge acquisition
- relevance ranking
- knowledge representation
- rule base
- knowledge based systems
- text summarization
- information retrieval systems
- logic programming
- foreign language
- belief revision
- chinese texts
- semantic network
- description logics
- metadata
- knowledge structures
- text retrieval
- machine translation
- word segmentation
- web documents
- web search
- geographic data