Legacy standard for specifying fonts and their properties in the X Windows System
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X logical font description (XLFD) is a font standard used by the X Window System and first published in 1988.[1] 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.
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
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