-typedef bool casefile_func (const struct casefile *, void *);
-typedef bool case_func (const struct ccase *, void *, const struct dataset *);
-typedef void begin_func (const struct ccase *, void *, const struct dataset*);
-
-typedef bool end_func (void *, const struct dataset *);
-
-typedef bool split_func (const struct ccase *, const struct casefile *,
- void *, const struct dataset *);