[1] Routing Backus-Naur Form (RBNF): A Syntax Used to Form Encoding Rules in Various Routing Protocol Specifications http://www.rfc-editor.org/rfc/rfc5511.txt
[2] RFC 5511 - Routing Backus-Naur Form (RBNF): A Syntax Used to Form Encoding Rules in Various Routing Protocol Specifications ( 版) http://tools.ietf.org/html/rfc5511