The following predicates are supported:
| Predicate | Arguments |
|---|---|
| atom_number/2 | ?Atom, ?Number |
| atom_length/2 | +Atom, ?Length |
| atom_prefix/2 | +Atom, +Prefix |
| atom_concat/3 | ?Atom1, ?Atom2, ?Atom3 |
| atomic_list_concat/2 | +List, ?Atom |
| atomic_list_concat/3 | +List, +Separator, ?Atom |
| upcase_atom/2 | +AnyCase, ?UpperCase |
| downcase_atom/2 | +AnyCase, ?LowerCase |