The Requirement with the specified ID.
The data in returned by a GET request contains only fields that belong to the requirement's type.
Passing data in a PUT request that contains fields that do not belong to the requirement's type is an error.
GET: Retrieves the requirement.
PUT: Updates the requirement.
DELETE: Deletes the requirement.
One of the HTTP Return Codes.
An XML string compliant with the Entity Schema or a string containing the entity data in another supported format.