[1] PubSub () https://www.w3.org/TR/2016/WD-pubsub-20161020/
[2] WebSub () https://www.w3.org/TR/2016/WD-websub-20161124/
[3] WebSub () https://www.w3.org/TR/2017/CR-websub-20170411/
[4] WebSub () https://w3c.github.io/websub/#title
[5] websub/implementation-reports at master · w3c/websub () https://github.com/w3c/websub/tree/master/implementation-reports
[6] w3c/websub: WebSub Spec in Social Web Working Group () https://github.com/w3c/websub
[8] Call for Exclusions: WebSub (Xueyuan Jia著, ) https://lists.w3.org/Archives/Public/public-socialweb/2017Apr/0005.html
[9] TransReq: WebSub to CR, from Social Web WG (Sandro Hawke著, ) https://lists.w3.org/Archives/Public/public-socialweb/2017Apr/0002.html
[10] WebSub () https://www.w3.org/TR/2017/PR-websub-20171003/#title
[11] WebSub () https://www.w3.org/TR/2018/REC-websub-20180123/#title
[12] WebSub () https://w3c.github.io/websub/
[14] JSON Feed - JSON Feed Version 1 (, ) https://jsonfeed.org/version/1#subscribing-to-real-time-notifications