atFileClassExt, atIsDerived - ASO class handling
char*atFileClassExt (Af_key *aso);
int atIsDerived (Af_key *aso);
atFileClassExt returns a short string (one or two characters long),
visualizing the attributed software objects (aso) class. This is a
superset of the file class symbols added to filenames by the ls -F
@ Symbolic Link.
Some combinations are possible. In espacially the circumflex (^) may be
combined with any other symbol, resulting in a two letter string.
atIsDerived checks whether the denoted aso is in a derived object cache
(return value TRUE) or not (return value FALSE).