de</em>, which is a unique value that defines the
      character for a given <em>encoding</em>.  For example, the character
      code&nbsp;65 represents the &lsquo;A&rsquo; in ASCII encoding.</p>

      <p>A face object contains one or more tables, called
      <em>charmaps</em>, that are used to convert character codes to glyph
      indices.  For example, most TrueType fonts contain two charmaps.  One
      is used to convert Unicode character codes to glyph indices, the other
      is used to convert A