An ABL (Advanced Business Language) library is a collection of r-code
combined in a single file. Libraries allow you to manage and execute r-code more
efficiently.
A library can be a procedure library (with a .pl file
extension) or an archive library (with a .apl file extension). Both
library types allow you to package your code efficiently, but an archive library also
provides security through code signing and validation. Within the procedure library
category there are two types: standard and memory-mapped. The following diagram shows
the hierarchy of ABL library types.
