The OpenType™ specification has been formatted in HTML, but may link to .PDF or document in Microsoft Word format.
OpenType specification version 1.8.2
- OpenType overview
- The OpenType font file
- Font file tables
- Advanced typographic extensions (OpenType layout)
- OpenType layout common table formats
- OpenType font variations overview
- OpenType font variations common table formats
- OpenType layout tag registry
- OpenType design-variation axis tag registry
- The WGL4.0 character set
- TrueType fundamentals
- The TrueType instruction set
- OpenType Mirroring Pairs list
- Adobe technical note #5176: “The Compact Font Format Specification”
- Adobe technical note #5177: “Type 2 Charstring Format”
- The CFF 2 Charstring Format
- Adobe Technical Note #5902: “PostScript Name Generation for Variation Fonts”
- Specification changes log file
OpenType 1.8.2 incorporates revisions in Amendment 1 and Draft Amendment 2 of the ISO/IEC 14496-22:2015 “Open Font Format (3rd edition)” standard. Additionally, it incorporates extensions not included in ISO/IEC 14496-22:2015 plus Amendments 1 and 2, including the 'MERG', 'meta' and 'sbix' tables, and all of the addtions related to OpenType Font Variations. Current editions and amendments of ISO/IEC 14496-22 are freely available for download from the ISO website.
Updates to this specification are noted in the change log.