(a2ps.info)Encoding Description Files

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6.2.2 Encoding Description Files
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The encoding description file describing the encoding KEY is named
'KEY.edf'.  It is subject to the same rules as any other a2ps file:
   - please make the name portable: alpha-numerical, at most 8
     characters,

   - empty lines and lines starting by '#' are ignored.

   The entries are
'Name:'
     Specifies the full name of the encoding.  Please, try to use the
     official name if there is one.
          Name: ISO-8859-1

'Documentation/EndDocumentation'
     Introduces the documentation on the encoding (Note: Documentation
     Format).  Typical informations expected are the other important
     names this encoding has, and the languages it covers.
          Documentation
          Also known as ISO Latin 1, or Latin 1.  It is a superset
          of ASCII, and covers most West-European languages.
          EndDocumentation

'Substitute:'
     Introduces a font substitution.  The most common fonts (e.g.,
     'Courier', 'Times-Roman'...)  do not support many encodings (for
     instance it does not support Latin 2).  To avoid that Latin 2 users
     have to replace everywhere calls to 'Courier', a2ps allows to
     specify that whenever a font is called in an encoding, then another
     font should be used.

     For instance in 'iso2.edf' one can read:
          # Fonts from Ogonkify offer full support of ISO Latin 2
          Substitute: Courier              Courier-Ogonki
          Substitute: Courier-Bold         Courier-Bold-Ogonki
          Substitute: Courier-BoldOblique  Courier-BoldOblique-Ogonki
          Substitute: Courier-Oblique      Courier-Oblique-Ogonki

'Default:'
     Introduces the name of the font that should be used when a font
     (not substituted as per the previous item) is called but provides
     to poor a support of the encoding.  The 'Courier' equivalent is the
     best choice.
          Default: Courier-Ogonki

'Vector:'
     Introduces the PostScript encoding vector, that is a list of the
     256 PostScript names of the characters.  Note that only the
     printable characters are named in PostScript (e.g., 'bell' in ASCII
     ('^G') should not be named).  The special name '.notdef' is to be
     used when the character is not printable.

     *Warning.*  Make sure to use real, official, PostScript names.
     Using names such as 'c123' may be the sign you use unusual names.
     On the other hand PostScript names such as 'afii8879' are common.