GetCodebookResponse

The key of the Codebook.

The Codes in the Codebook, in the order they appear in the Codebook.
Codebooks are tree structured and may be of any depth, although a depth of more than 6 is rare.
Only the leaf nodes may be applied to a response. These leaf nodes are Codes.
Nets have child codes or nets. Nets may not be used to code a response. They serve to provide structure to the Codebook.
Nets typically represent groups of related codes.

If null the request was processed without error. If not null errors occurred while processing the request. The array contains the error messages.