HTTP/3: from root to tip

The fact of the matter, however, is that HTTP/3 is just a new HTTP syntax that works on IETF QUIC, a UDP-based multiplexed and secure transport. The early Web used HTTP and SSL protocol definitions that were published outside the IETF, these are marked as red lines on the Secure Web Timeline. If an I-D is adopted by the IETF, or if the I-D was initiated directly within the IETF, the name is draft-ietf-{working group}-{topic}-{version}.

Source: blog.cloudflare.com