This rule belongs to the
openapi-v3-syntax-linting ruleset and states that:
Key of a header content map must be set as a specific media type which is in compliance with RFC6838.
|Message||The key of the header content map definition is invalid.|
|Products Impacted||API Transformer, Code Generation, Developer Experience Portal|
- A media type consists of a top-level type and a subtype, which is further structured into a tree. A media type can optionally define a suffix and parameters as well.
- A media type follows a pattern like the following where segments between  are optional segments: <type>/[<tree>.]<subtype>[+<suffix>]*[;<parameter>]
- Some examples of valid media types are: application/json, application/vnd.api+json, text/plain.
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