[1] RFC 7089 - HTTP Framework for Time-Based Access to Resource States -- Memento ( ( 版)) <http://tools.ietf.org/html/rfc7089#section-5>
[4] RFC 8075 - Guidelines for Mapping Implementations: HTTP to the Constrained Application Protocol (CoAP) () <https://tools.ietf.org/html/rfc8075#section-6.5.2>