This document defines two independent HTTP Cache-Control extensions that allow control over the use of stale responses by caches. This document is not an Internet Standards Track specification; it is published for informational purposes.| IETF Datatracker
In many standards track documents several words are used to signify the requirements in the specification. These words are often capitalized. This document defines these words as they should be interpreted in IETF documents. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.| IETF Datatracker