Plan-execute-verify on Where ten HTTP header fields are defined

Perfect! I have collected all the information needed. Let me compile the findings:

Summary of findings:

1. Age - RFC 9111, Section 5.1 (HTTP Caching)
2. Cache-Control - RFC 9111, Section 5.2 (HTTP Caching)
3. Expires - RFC 9111, Section 5.3 (HTTP Caching)
4. Last-Modified - RFC 9110, Section 8.8.2 (HTTP Semantics)
5. ETag - RFC 9110, Section 8.8.3 (HTTP Semantics)
6. Location - RFC 9110, Section 10.2.2 (HTTP Semantics)
7. Retry-After - RFC 9110, Section 10.2.3 (HTTP Semantics)
8. Vary - RFC 9110, Section 12.5.5 (HTTP Semantics)
9. Strict-Transport-Security - RFC 6797, Section 6.1 (HTTP Strict Transport Security)
10. Link - RFC 8288, Section 3 (Web Linking)

All of these RFCs are current standards that have not been obsoleted by newer versions at this time. RFC 9110 and RFC 9111 are the current standards for HTTP semantics and caching (obsoleting earlier RFCs 7230-7235), RFC 6797 is the current standard for HSTS, and RFC 8288 is the current standard for Web Linking (obsoleting RFC 5988).

{"answers":[{"field":"Age","rfc":"9111","section":"5.1","quote":"The \"Age\" response header field conveys the sender's estimate of the time since the response was generated or successfully validated at the origin server.","url":"https://www.rfc-editor.org/rfc/rfc9111.html"},{"field":"Cache-Control","rfc":"9111","section":"5.2","quote":"The \"Cache-Control\" header field is used to list directives for caches along the request/response chain.","url":"https://www.rfc-editor.org/rfc/rfc9111.html"},{"field":"Expires","rfc":"9111","section":"5.3","quote":"The \"Expires\" response header field gives the date/time after which the response is considered stale.","url":"https://www.rfc-editor.org/rfc/rfc9111.html"},{"field":"Last-Modified","rfc":"9110","section":"8.8.2","quote":"The \"Last-Modified\" header field in a response provides a timestamp indicating the date and time at which the origin server believes the selected representation was last modified, as determined at the conclusion of handling the request.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},{"field":"ETag","rfc":"9110","section":"8.8.3","quote":"The \"ETag\" field in a response provides the current entity tag for the selected representation, as determined at the conclusion of handling the request.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},{"field":"Location","rfc":"9110","section":"10.2.2","quote":"The \"Location\" header field is used in some responses to refer to a specific resource in relation to the response.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},{"field":"Retry-After","rfc":"9110","section":"10.2.3","quote":"Servers send the \"Retry-After\" header field to indicate how long the user agent ought to wait before making a follow-up request.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},{"field":"Vary","rfc":"9110","section":"12.5.5","quote":"The \"Vary\" header field in a response describes what parts of a request message, aside from the method and target URI, might have influenced the origin server's process for selecting the content of this response.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},{"field":"Strict-Transport-Security","rfc":"6797","section":"6.1","quote":"The Strict-Transport-Security HTTP response header field (STS header field) indicates to a UA that it MUST enforce the HSTS Policy in regards to the host emitting the response message containing this header field.","url":"https://www.rfc-editor.org/rfc/rfc6797.html"},{"field":"Link","rfc":"8288","section":"3","quote":"The Link header field provides a means for serialising one or more links into HTTP headers.","url":"https://www.rfc-editor.org/rfc/rfc8288.html"}]}