+'mother [UTF-2000 only] Base coded-charset.
+'code-min [UTF-2000 only] Minimum code-point of a base coded-charset.
+'code-max [UTF-2000 only] Maximum code-point of a base coded-charset.
+'code-offset [UTF-2000 only] Offset for a code-point of a base
+ coded-charset.
+'conversion [UTF-2000 only] Conversion for a code-point of a base
+ coded-charset (94x60 or 94x94x60).