Dictionaries are now commonly used resources in NLP systems. However, different lexical resources are not uniform; they contain different types of information and do not assign words the same number of senses. One way in which this problem might be tackled is by producing mappings between the senses of different resources, the "dictionary mapping problem". However, this is a non-trivial problem, as examination of existing lexical resources demonstrates. Lexicographers have been divided between "lumpers', or those who prefer a few general senses, and "splitters" who create a larger number of more specific senses so there is no guarantee that.
