descriptive vs normative

Of, relating to, or providing a description. 

Describing and seeking to classify, as opposed to normative or prescriptive. 

Of an adjective, stating an attribute of the associated noun (as heavy in the heavy dictionary). 

Describing the structure, grammar, vocabulary and actual use of a language. 

Conforming to a norm or norms. 

Attempting to establish or prescribe a norm. 

Of or pertaining to a norm or standard.