In article the essence of concept of the key sign as structural element of a semiotics code is defined, lexical and grammatical kinds of key signs in prosaic works by О. K. Hlushko are established and the most frequency morphological categories which are used for their formal representation are analyzed. It is established that morphological correlation of a key sign depends on an explication of a code in which it functions. Key signs of the hermeneutic codes, which are the codes of riddle, are

more »

... erbs of an indicative mood, verbs of past tense and verbs of perfective aspect. Semiotic codes are divided into two blocks - characters and elements. But in the first block and in the second block the author installed by chastony key signs, which are expressed by nouns in singular, masculine and female, genitive and prepositional cases. The key signs, which have an adjective forms, are less usable. Symbolical codes are presented noun, numeral and verbal adverb key signs. Actional codes, which indicate actions and motives, have forms of verbs and infinitive forms. Cultural codes are presented by nouns and adjectives. As they show of reality of culture, nouns have big degree of rate.