Regular text layout mainly deals with a line of text, often formatted with a single font. Layout of math formulas is quite different from regular text layout that is done using tables such as GSUB and GPOS. Different math-layout engine implementations can use this data to produce different layout results in accordance with different purposes or goals. The MATH table provides font data required for math layout, but detailed algorithms for use of the data are not specified. Note that this is not a complete specification of math layout. The MATH table provides this font-specific information necessary for math formula layout. In order for a math-layout engine to support layout of mathematical formulas, several types of font-specific information particular to the layout of formulas are required. Mathematical formulas are complex text objects in which multiple elements with various metric, style or positioning attributes are combined.
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