X logical font description (XLFD) is a font standard used by the X Window System. Modern X software typically relies on the newer Fontconfig system instead, but XLFDs are still supported in current X window implementations for compatibility with legacy software.
The xfontsel program allows the user to view the glyphs of a font
XLFD is intended to support:
unique, descriptive font names that support simple pattern matching
multiple font vendors, arbitrary character sets, and encodings
naming and instancing of scalable and polymorphic fonts
transformations and subsetting of fonts
independence of X server and operating or file system implementations
arbitrarily complex font matching or substitution
extensibility
One prominent XLFD convention is to refer to individual fonts including any variations using their unique FontName. It comprises a sequence of fourteen hyphen-prefixed, X-registered fields:
FOUNDRY: Type foundry - vendor or supplier of this font
Mansfield, Niall (1994) [1992]. "System Administration". The Joy of X - An overview of the X Window System. Cambridge: Addison-Wesley. pp. 266–267. ISBN0-201-56512-9.
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