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Chapter 5. Text > Font Descriptors

5.7. Font Descriptors

A font descriptor specifies metrics and other attributes of a simple font or a CIDFont as a whole, as distinct from the metrics of individual glyphs. These font metrics provide information that enables a consumer application to synthesize a substitute font or select a similar font when the font program is unavailable. The font descriptor may also be used to embed the font program in the PDF file.

Font descriptors are not used with Type 0 fonts. Beginning with PDF 1.5, font descriptors may be used with Type 3 fonts in Tagged PDF documents (see Section 10.7, “Tagged PDF”).


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