Font variations (“variable fonts”) enable glyph outlines, and other font data, to be variable based on one or more design-axis parameters.This is especially useful, for example, for sets of CJK (Chinese, Japanese, Korean) fonts of the same design that share most glyphs in common but that vary with locale-specific glyphs for certain characters. OpenType collection files enable multiple fonts that share common data to be housed within a single file, allowing for de-duplication of data.The mathematical typesetting table allows a font to include data required for layout of complex, math formulas.OpenType Layout tables provide the advanced typographic capabilities needed for high-quality typography as well as for international text using the wide variety of scripts supported in The Unicode Standard. ![]() ![]() All Unicode® characters can be supported, including supplementary-plane characters, as well as Unicode variation sequences.Multicolor glyph presentation is supported using embedded color bitmaps or SVG documents, or using layered compositions of colored, outline-format glyphs defined within the font.Glyph outline data can use the CFF or CFF version 2 formats, as well as the TrueType glyph format.But several additional capabilities are supported, including the following: It was developed as an extension of the original TrueType format, using the same 'sfnt' container structure, and maintains compatibility for fonts that were created following the original TrueType specification. The OpenType font format is a widely-supported format for font data with a rich set of capabilities for digital typography.
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