The glyph to Unicode string mapping table for all the characters
in the font that contain one.
Most glyphs map to a single Unicode character. However in some
circumstances it may be necessary to map one glyph to a sequence of
characters. For example the sequence "ffl" may be represented as
one glyph in a font. If there is no Unicode encoding for this type
of ligature then it will need to map back to a string rather than a
single Unicode character.
Typically you would use the StringAtom Decode
DecodeDoubleByte methods to allow text operator parameters to
be decoded into the base text encoding. These can then be passed
through the FontObject EncodingToChar and EncodingToString
properties to allow mapping from the text encoding through to
String encodings are unusual and this property is normally
empty. If it is populated it should be viewed as a supplement and
an override for the EncodingToChar
and CharToEncoding mappings.