http://www.rfc-editor.org/rfc/rfc6756.txt
RFC 6756: Internet Engineering Task Force and International Telecommunication Union - Telecommunication Standardization Sector Collaboration Guidelines, S. Trowbridge, E. Lear, G. Fishman, S. Bradner2012-09-01T23:00:00-00:00This document is not an Internet Standards Track specification; it is published for informational purposes.