Chapter 4 Building Application Layer Diagrams

Systems, Applications, and Databases (EAM)

A System is a packaged application that can contain sub systems, applications, services and other application elements.

An application is a computer program, a collection of data groups (databases and/or parts of databases) and program modules (components, database management systems, utilities, interactive modules, and system modules), which implements a business function.

A database is a representation of an installed database.

These objects can be created in the following diagrams:

• City planning diagram (see the Building Business Layer Diagrams chapter)
• Application architecture diagram (see Application Architecture Diagram Basics)
• Service-oriented diagram (see Service Oriented Diagram Basics)

Example

In this example, the Inventory system contains the Stock Management application and the Stock database:

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