[1] RFC 5988 - Web Linking ( (2012-03-22 09:19:11 +09:00 版)) <http://tools.ietf.org/html/rfc5988#page-16>
[2] RFC 5829 - Link Relation Types for Simple Version Navigation between Web Resources (2014-11-02 14:41:04 +09:00 版) <http://tools.ietf.org/html/rfc5829#section-4.4>