Keyphrases
- query processing
- similarity join
- data structure
- co occurrence
- edit distance
- wordnet
- query expansion
- pattern matching
- user defined
- string matching
- context free grammars
- binary strings
- string similarity
- regular expressions
- neural network
- database
- proximity graph
- scoring function
- suffix tree
- variable length
- metric space
- database systems
- information retrieval