English Dictionary

Postel's law

name

(software engineering) The design principle that software should be conservative as to its own behaviour (i.e. strictly compliant with specifications) but liberal in the behaviour it tolerates from other systems.

Postel's law is a principle in network engineering that states that a network protocol should be lenient in what it accepts and strict in what it sends.

意味（1）

(software engineering) The design principle that software should be conservative as to its own behaviour (i.e. strictly compliant with specifications) but liberal in the behaviour it tolerates from other systems.

Contravariance is consistent with Postel's Law: “Be liberal in what you accept, and conservative in what you send.”