Presentationsdefinierade

Presentationsdefinierade is a term used in software design to describe data and UI structures that are defined primarily by the presentation layer rather than by the domain model. In this approach, the form, labels, formats, and even selected fields of data are guided by how they will be displayed to users, and are mapped from the underlying domain objects through adapters or view models.

Characteristics include the separation of concerns between domain logic and presentation logic; the use of presentation models or view models that carry only what is needed for the UI; explicit formatting rules for dates, numbers, and localization; and a mapping layer that translates domain entities into presentation representations.

Benefits include greater flexibility in UI design, easier localization and formatting, and the ability to evolve the user interface without changing core business logic. It can also simplify template-driven rendering and enable multiple presentation variants for the same data.

Drawbacks include potential data duplication between domain and presentation layers, the risk of UI logic creeping into domain models if not carefully designed, and added maintenance costs due to keeping two representations synchronized.

Common use cases are web or mobile applications with diverse presentation requirements, reporting dashboards, and cross-platform interfaces where the same data is displayed in different formats.

Related concepts include MVVM, MVC, DTOs, view models, and anti-corruption layers, all of which address the boundaries between data, logic, and presentation.