HTTP/1.1
HTTP/1.1 metamodel can be viewed here. The UML model can be downloaded here.
Disclosure: This metamodel was derived from the Internet Society documents but is in no way associated the HTTP/1.1 specification nor it has been reviewed by the Internet Society members. It is provided as-is with no warranty of suitability or correspondence to the Internet Society specifications. It is only provided to facilitate the understanding of these specifications.
It was created from the Internet Society documents:
Copyright notice
Copyright (C) The Internet Society (1999). All Rights Reserved.
The metamodel was designed using MagicDraw community edition which can be downloaded for free here.
Related specifications
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.