8. IANA Considerations
The change controller for the following registrations is: "IETF ([email protected]) - Internet Engineering Task Force".
8.1 Field Name Registration
IANA has updated the "Hypertext Transfer Protocol (HTTP) Field Name Registry" at ````https://www.iana.org/assignments/http-fields\````, as described in Section 18.4 of [HTTP], with the field names listed in the table below:
| Field Name | Status | Section | Comments |
|---|---|---|---|
| Age | permanent | 5.1 | |
| Cache-Control | permanent | 5.2 | |
| Expires | permanent | 5.3 | |
| Pragma | deprecated | 5.4 | |
| Warning | obsoleted | 5.5 |
8.2 Cache Directive Registration
IANA has updated the "Hypertext Transfer Protocol (HTTP) Cache Directive Registry" at ````https://www.iana.org/assignments/http-cache-directives\```` according to the registration procedure of Section 5.2.4 and with the cache directive names summarized in the table below.
| Cache Directive | Section |
|---|---|
| max-age | 5.2.1.1, 5.2.2.1 |
| max-stale | 5.2.1.2 |
| min-fresh | 5.2.1.3 |
| must-revalidate | 5.2.2.2 |
| must-understand | 5.2.2.3 |
| no-cache | 5.2.1.4, 5.2.2.4 |
| no-store | 5.2.1.5, 5.2.2.5 |
| no-transform | 5.2.1.6, 5.2.2.6 |
| only-if-cached | 5.2.1.7 |
| private | 5.2.2.7 |
| proxy-revalidate | 5.2.2.8 |
| public | 5.2.2.9 |
| s-maxage | 5.2.2.10 |
8.3 Warn Code Registry
IANA has added the following note to the "Hypertext Transfer Protocol (HTTP) Warn Codes" registry at ````https://www.iana.org/assignments/http-warn-codes\```` to indicate that "Warning" has been obsoleted:
The Warning header field (and the warn codes it uses) have been obsoleted by HTTP per [RFC9111].