The author of the article suggests the taxonomy of the objectivation methods of pragmatic and linguistic norms of professional sublanguage: subjective method, semantic method (by enumerating referent's nominations), method of limiting the domain of the possible and the method of extensional definition. Professional sublanguage demonstrates the implementation of pragmatic and linguistic norm primarily as pointing out the domain of the possible (dysphemisation and the derisionof referent). The article shows that the relevance of norm is increased in the context of external contacts and the elimination of communication.