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PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...
CFF fonts can be embedded in PDF files, starting with PDF version 1.2. It is the usual approach to representing a Type 1 font within PDF. CID-keyed fonts can be represented within CFF with Type 2 charstrings for CID-keyed OpenType fonts. A Type 1 font can be losslessly converted into CFF/Type2 format and back.
The latter case is called an embedded font while the former is called an unembedded font. The font files that may be embedded are based on widely used standard digital font formats: Type 1 (and its compressed variant CFF), TrueType, and (beginning with PDF 1.6) OpenType. Additionally PDF supports the Type 3 variant in which the components of ...
Both OpenOffice.org and LibreOffice support font embedding in the PDF export feature. [3] Font embedding in word processors is not widely supported nor interoperable. [4] [5] For example, if a .rtf file made in Microsoft Word is opened in LibreOffice Writer, it will usually remove the embedded fonts. [citation needed]
PDF/X is a subset of the ISO standard for PDF. The purpose of PDF/X is to facilitate graphics exchange, and it therefore has a series of printing-related requirements which do not apply to standard PDF files. For example, in PDF/X-1a all fonts need to be embedded and all images need to be CMYK or spot colors.
TrueType is an outline font standard developed by Apple in the late 1980s as a competitor to Adobe's Type 1 fonts used in PostScript.It has become the most common format for fonts on the classic Mac OS, macOS, and Microsoft Windows operating systems.
Nimbus Sans L is a version of Nimbus Sans using Adobe font sources. It was designed in 1987. The family includes 17 fonts in 5 weights and 2 widths, with Nimbus Sans L Extra Black only available in condensed roman format.
The current PDF specification, ISO 32000-1:2008, is available from ISO's website, and under special arrangement, without charge from Adobe. [ 28 ] Because the format is designed to reproduce fixed-layout pages, re-flowing text to fit mobile device and e-book reader screens has traditionally been problematic.