[56] RFC 2706 - ECML v1: Field Names for E-Commerce, 2021-04-11T14:47:01.000Z, 2021-04-12T02:28:12.679Z https://tools.ietf.org/html/rfc2706

[8] RFC 3106 - ECML v1.1: Field Specifications for E-Commerce (2014-11-30 23:24:40 +09:00 版) http://tools.ietf.org/html/rfc3106

[57] Using P3P for E-Commerce, 2017-10-02T10:21:59.000Z, 2021-04-22T09:53:52.341Z https://www.w3.org/TR/1999/NOTE-P3P-for-ecommerce-19991129

[1] RFC 3505 - Electronic Commerce Modeling Language (ECML): Version 2 Requirements, 2019-03-04T05:31:15.000Z, 2021-04-24T09:48:54.291Z https://tools.ietf.org/html/rfc3505

[2] Cover Pages: Electronic Commerce Modeling Language (ECML), 2008-01-22T03:19:09.000Z, 2021-04-24T09:49:39.165Z http://xml.coverpages.org/ecml.html

[3] rfc4112, 2021-07-16T04:28:15.000Z https://datatracker.ietf.org/doc/html/rfc4112