Custom message attribute value. The same restrictions apply to string values as to the message body.

    The message name, type, value, and body cannot be empty. The total size of all parts of a message put together cannot exceed 256 KB.

    Parameter Type Required parameter Description
    BinaryListValue.N array No Not implemented.
    BinaryValue base64 No Any binary data.
    DataType string Yes Data type: String, Number, or Binary. For the Number type, use StringValue.
    StringListValue.N string No Not implemented.
    StringValue string No UTF-8 encoded string.