Mismatched document about AWS Encryption SDK message format

Hi, I'm testing encryption and decryption on AWS KMS using SDK libraries(Node.js and Python).

Encryption responses of all libraries are not mismatched with response structure described in document(https://docs.aws.amazon.com/encryption-sdk/latest/developer-guide/message-format.html#body-framed-final-tag).

For example, `Reserved` property should be 4 zero sequence bytes, but it seems not be appeared in response structure. and also, the `Type` property should be 128(0x80) which is positioned immediately after `Version` property, but it is not matched too.

My purpose is to extracting some information like an initialization vector, however I'm stuck due to the mismatched documentation.

Let me know if document was deprecated or something what I'm missing.

Thank you.

Start with the linked Message Format documentation, then compare its Reserved and Type fields against the Node.js and Python AWS KMS encryption responses described in the report. Done means the documentation or specification and the observed response structure are reconciled, with the expected format clarified.

Written by the indexing model from the issue text.