[1] Press release 30 June 2011 - ISO/IEC and Ecma International ratify “ES5.1”, the latest ECMAScript specification of Ecma International ( (2011-06-30 22:24:33 +09:00 版)) <http://www.ecma-international.org/news/PressReleases/PR_ISOIEC_and_Ecma_International_ratify_ES5.1.htm>