Keyphrases
- named entities
- controlled vocabulary
- information extraction
- free text
- named entity recognition
- natural language processing
- named entity extraction
- co occurrence
- metadata
- question answering
- national library of medicine
- relation extraction
- text mining
- automatic indexing
- semantic technologies
- wordnet
- medical literature
- information retrieval
- string matching
- noun phrases
- text documents
- semi structured
- artificial intelligence
- unsupervised learning
- gene ontology
- data mining
- databases
- xml documents
- database