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2.2.1.1 client-request-id

The client-request-id HTTP header is optional and can appear in either the request or the response. This header is used to provide the key provisioning server with a unique request identifier, which is then used by the server to log error messages that were encountered while processing the lookup request. If present, the value of the client-request-id header MUST be a globally unique identifier (GUID) in standard string representation (see [RFC4122] section 3 for the format).

The format of the client-request-id header, in Augmented Backus-Naur Form (ABNF), is as follows.

 String = *(%x20-7E)
 client-request-id = String