What Is the Landmark Data Structure?

LPL files are the logical representation of database structure and constraints, plus business logic. LPL files describe a collection of business classes, business tasks, modules, fields, and other miscellaneous files. A runtime dictionary is generated from these files that includes the structural metadata for the persistent data portion of the business classes. Business Class, Module, Key Field, and Field files built using Landmark Pattern Language (LPL) encapsulate all application business logic.