• [2] behold! placeholders for multimedia elements., Hixie, 2006-11-01 10:55:09 +09:00, 2024-09-01T10:39:00.000Z https://github.com/whatwg/html/commit/ca90a8be5f305c34a0b73d8af591ca358ef3951d#diff-41cf6794ba4200b839c53531555f0f3998df4cbb01a4d5cb0b94e3ca5e23947d
• [3] <iframe> section header, Hixie, 2006-11-02 00:44:59 +09:00, 2024-09-01T10:39:09.000Z https://github.com/whatwg/html/commit/78a7b2ab829d3010266c0e6a9bb846efef0dfa09#diff-41cf6794ba4200b839c53531555f0f3998df4cbb01a4d5cb0b94e3ca5e23947d
• [4] embed, object, param, map, area headers. Make comments and PIs explic…, Hixie, 2006-11-02 06:38:15 +09:00, 2024-09-01T10:39:16.000Z https://github.com/whatwg/html/commit/50796195358086318c5e0cca8dc64c679974ef5c#diff-41cf6794ba4200b839c53531555f0f3998df4cbb01a4d5cb0b94e3ca5e23947d

[1] Web Applications 1.0 r364 make 'embedded content' an actual type of content ( (2006-11-28 06:40:00 +09:00 版)) http://html5.org/tools/web-apps-tracker?from=363&to=364