http://www.rfc-editor.org/rfc/rfc4012.txt
RFC 4012: Routing Policy Specification Language next generation (RPSLng), L. Blunk, J. Damas, F. Parent, A. Robachevsky2005-03-01T23:00:00-00:00This memo introduces a new set of simple extensions to the Routing Policy Specification Language (RPSL), enabling the language to document routing policies for the IPv6 and multicast address families currently used in the Internet. [STANDARDS-TRACK]