The Isolation HTTP header — conditional requests & concurrency, not observed in the catalog.
Isolation
Conditional Requests & Concurrency IANA provisional
A reference entry. The registry facts and catalog measurements below are complete; the written guidance for this header has not been authored yet.
Isolation is conditional requests & concurrency — Headers that make a request conditional on the state of a resource — the difference between a safe update and a lost one.
The registry
Listed in the IANA HTTP Field Name Registry as a provisional entry — registered, but not through a standards-track document. Defined in OData Version 4.01 Part 1: Protocol][OASIS][Chet_Ensign.
In the catalog
Registered with IANA and declared by not one of the 26,641 providers in the API Evangelist catalog. A registered field with no observed use is still part of the vocabulary — it just is not part of the practice.
Governed by these rules
Machine-enforceable governance rules from rules.apievangelist.com that apply to this header when it appears in an OpenAPI.
OpenAPI Components Headers Error error
Utilizing the headers object in the centralized OpenAPI components library helps make headers reusable across API requests and responses
Guidance: Rate Limits →OpenAPI Components Headers Info info
Utilizing the headers object in the centralized OpenAPI components library helps make headers reusable across API requests and responses
Guidance: Rate Limits →OpenAPI Headers Hyphenated Pascal Case error
HTTP headers should follow Hyphenated-Pascal-Case naming convention for consistency and readability, such as Content-Type, X-Request-Id, or Accept-Language.
Guidance: Naming →