: How the system interacts with external systems or users (APIs, UI logic, etc.). Sample Structure for an LDD Content Description 1. Introduction
: Detailed descriptions of the system's logic, including business rules, validation logic, and process workflows. Software Logical Design Document Sample
Purpose of the document, scope of the system, and intended audience. : How the system interacts with external systems
: Offers various Software Design Document Templates that include logical design sections. including business rules
: A high-level diagram showing the major functional modules and how they interact.