ISO/IEC 9541 defines a method of naming glyphs and glyph collections, independent of any document encoding technique, it assumes that one or more methods of associating document encoding techniques with glyph identifiers used in font resources will be provided by text processing systems.

ISO/IEC 9541-1:2012 specifies the architecture of a font resource, i.e. the font description, font metrics, glyph description and glyph metrics properties required for font references and the interchange of font resources.