na-adjective
normative; prescriptive
Used in academic, philosophical, or formal contexts to describe standards, rules, or ideals that prescribe how things should be, rather than describing how they are.
規範的な文法は、言葉の正しい使い方を定める。
Prescriptive grammar establishes the correct usage of language.
彼の研究は規範的な倫理学に焦点を当
His research focuses on normative ethics.
記述的 means 'descriptive', often contrasted with 規範的 in linguistics and philosophy.
Compound of 規範 (norm, standard) + 的 (-like, -ive). The suffix 的 derives from Chinese and forms adjectival nouns.