ZEF
determine mime type by file extension
CPAN
Record types!
ZEF
Record types!
CPAN
Typechecking based on kinds
ZEF
Typechecking based on kinds
CPAN
Sugar for enum's meta-object protocol
ZEF
produce the common type / role of a list of objects
ZEF
Grammar and role for metadata entities: data types, column names, schema names, etc.
CPAN
Failure sum type
ZEF
Thread-safe static buffer