pub const OPENAPI3: &str = "https://spec.openapis.org/oas/3.0/schema/2024-10-18#/definitions/Schema";Expand description
The mata-schema for OpenAPI 3.0 schemas
(https://spec.openapis.org/oas/3.0/schema/2024-10-18#/definitions/Schema).
This should rarely be encountered in practice, as OpenAPI schemas are typically only
embedded within OpenAPI documents, so do not have a $schema property set.