head feature principle; HFP
A technical term in linguistics, specifically in Head-driven Phrase Structure Grammar (HPSG). Refers to the principle that the head of a phrase shares its syntactic features with the phrase itself.
The Head Feature Principle is one of the central constraints in HPSG.
Compound of 主辞 (head word) + 素性 (feature) + 原理 (principle), a calque from English 'head feature principle'.