[1]
[CITE[Dynamic HTML in Communicator]] ([TIME[1997-08-13 09:33:24 +09:00]] 版) <http://web.archive.org/web/19971016003150/developer.netscape.com/library/documentation/communicator/dynhtml/webfont1.htm#1032362>

[2] [CITE@en-US-x-hixie[HTML 5]] ([TIME[2009-07-25 05:16:37 +09:00]] 版) <http://www.whatwg.org/specs/web-apps/current-work/#fonts-and-colors>

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When a font element has a pointsize attribute, the user agent is expected to parse that attribute's value using the rules for parsing non-negative integers, and if this doesn't generate an error, then the user agent is expected to use the parsed value as a point length for a presentational hint for the 'font-size' property on the element.