Perhaps you mean multipart/braid? There is no mixed/* mime-type prefix that I know of. How would your suggestion work? Can you give an example HTTP response

Perhaps you mean multipart/braid? There is no mixed/* mime-type prefix that I know of. How would your suggestion work? Can you give an example HTTP response to explain what it would look like? The purpose of standards is interoperability. What software would this mixed/braid or multipart/braid mime-type help us be interoperable with?