What does the Executable Library hold, and how is it organized?

A structured set of directly callable executable objects (t-codes, Fiori apps) — no duplicates, each recorded once, with technical specs added (design shared).

Organized first by logical component group, then by the software's internal structure (SAP uses the application-component hierarchy SD/FI/HCM). The library-generation tool can build it automatically from actual ABAP production usage.