K is set of key phrases. A key phrase is a structural linguistic unit such as a word or a phrase. It's the main element to form the concepts of ontology. There are two kinds of key phrases: single key phrase and combined key phrase.
K is set of key phrases. A key phrase is a structurallinguistic unit such as a word or a phrase. It's the mainelement to form the concepts of ontology. There are twokinds of key phrases: single key phrase and combinedkey phrase.