[4] HTTP 要求 >>2 や SSDP >>3 で使います。
[1] draft-cohen-gena-client-00 - General Event Notification Architecture Base: Client to Arbiter ( (6/14/2014, 8:42:57 PM 版)) <http://tools.ietf.org/html/draft-cohen-gena-client-00#section-8.2>
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