OpenType specification (OpenType 1.6)
The OpenType™ specification has been formatted in HTML, but may link to .PDF files.
OpenType specification version 1.6
Appendices
- Advanced typographic extensions (OpenType Layout)
- OpenType Layout Common Table Formats
- OpenType Layout 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.”
- Specification changes log file
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.
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OpenType specification