In software development, presentation logic is concerned with how business objects are displayed to users of the software, e.g. the choice between a
pop-up screen and a
drop-down menu
A drop-down list (abbreviated drop-down, or DDL; also known as a drop-down menu, drop menu, pull-down list, picklist) is a graphical control element, similar to a list box, that allows the user to choose one value from a list. When a drop-down ...
.
The separation of
business logic In computer software, business logic or domain logic is the part of the program that encodes the real-world business rules that determine how data can be created, stored, and changed. It is contrasted with the remainder of the software that might ...
from presentation logic is an important concern for software development and an instance of the
separation of content and presentation
Separation of content and presentation (or separation of content and style) is the separation of concerns design principle as applied to the authoring and presentation of content. Under this principle, visual and design aspects (presentation and s ...
.
One major rationale behind "effective separation" is the need for maximum flexibility in the code and resources dedicated to the presentation logic.
Client demands, changing customer preferences and desire to present a "fresh face" for pre-existing content often result in the need to dramatically modify the public appearance of content while disrupting the underlying infrastructure as little as possible.
The distinction between "presentation" (front end) and "business logic" is usually an important one, because:
* the presentation source code language may differ from other code assets;
* the production process for the application may require the work to be done at separate times and locations;
* different workers have different skill sets, and presentation skills do not always coincide with skills for coding business logic;
* code assets are easier to maintain and more readable when disparate components are kept separate and
loosely coupled;
References
Software design
Software architecture
Software engineering terminology
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