Keyword extraction

Keyword extraction is tasked with the automatic identification of terms that best describe the subject of a document. Key phrases, key terms, key segments or just keywords are terminology which is used for defining the terms that represent the most relevant information contained in the document. Although the terminology is different, funkction is always the same: caracterization of the topic discused in a document. Keyword extraction task is important problem in Text Mining, Information Retrieval and Natural Languge Processing.