The OpenType™ specification has been formatted in HTML, but may link to .PDF or document in Microsoft Word format.
Download full specification [about 1.8Mb]
Updates to this specification are noted in the change log. OpenType version 1.6 is fully technically equivalent to the ISO/IEC 14496-22:2009 (Second Edition) "Open Font Format" standard. The standard was published in July 2009, and is now freely available for download from the ISO website.
This page was last updated 21 September 2009.
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