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Chapter 5. Text > Embedded Font Programs

5.8. Embedded Font Programs

A font program can be embedded in a PDF file as data contained in a PDF stream object. Such a stream object is also called a font file by analogy with font programs that are available from sources external to the consumer application. (See also implementation note 68 in Appendix H.)

Font programs are subject to copyright, and the copyright owner may impose conditions under which a font program can be used. These permissions are recorded either in the font program or as part of a separate license. One of the conditions may be that the font program cannot be embedded, in which case it should not be incorporated into a PDF file. A font program may allow embedding for the sole purpose of viewing and printing the document but not for creating new or modified text that uses the font (in either the same document or other documents). The latter operation would require the user performing the operation to have a licensed copy of the font program, not a copy extracted from the PDF file. In the absence of explicit information to the contrary, a PDF consumer should assume that any embedded font programs are to be used only to view and print the document and not for any other purposes.


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