RAML parameter usage: Which of the following is true about RAML path parameters?

• A. They describe the response payload.
• B. They define deployment targets.
• C. They define path parameters with types and required flags, and also cover query and header parameters.
• D. They control security policies.

Answer: (C)

In RAML, parameters are used to document and validate what inputs an API endpoint accepts. Path parameters come from the URI template and are defined under the resource as uriParameters, where you specify each parameter’s type and whether it is required. This mirrors how the path template like /pets/{petId} expects a value for petId. RAML also supports documenting other kinds of inputs for the same operation—queryString parameters (queryParameters) and HTTP header parameters (headers). Each of these parameter groups can define a type, a required flag, and other details like description or default values. So the statement is correct: RAML parameter usage covers path parameters with types and required flags, and it also encompasses query and header parameters.