Keyword extraction is tasked with the automatic identification of terms that best describe the subject of a document.
Although the terminology is different, function is the same: characterization of the topic discussed in a document.
The task of keyword extraction is an important problem in text mining, information extraction, information retrieval and natural language processing (NLP).
[3] Keyword assignment methods can be roughly divided into: Methods for automatic keyword extraction can be supervised, semi-supervised, or unsupervised.
[5] This computational linguistics-related article is a stub.