A pre-condition: apply this operation only if the HTTP Entity Tag matches.
HTTP Entity Tags allow applications to conditionally execute a query only if the target resource matches the expected state. This can be useful, for example, to implement optimistic concurrency control in the application.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-05-07 UTC."],[[["This page provides documentation for the `IfMatchEtag` structure across multiple versions, ranging from 2.11.0 to the latest release candidate 2.37.0-rc."],["`IfMatchEtag` is used as a pre-condition to apply an operation only if the HTTP Entity Tag matches the expected state."],["The documentation covers various historical versions of the `IfMatchEtag` structure, indicating a detailed version history and specific changes or features implemented in each version."],["HTTP Entity Tags are used to allow applications to conditionally execute a query only if the resource matches, which is useful for implementing optimistic concurrency control."],["The `header_name()` function is documented within, but the function's return type is not fully documented, only stating it returns a `char const *`."]]],[]]
