Which principle should be utilized to reduce duplication of already created elements?

The principle referred to here is the DRY principle, which stands for "Don't Repeat Yourself." This principle emphasizes the importance of reducing repetition of code and data in software development. By adhering to the DRY principle, developers aim to eliminate redundancy, which can lead to more maintainable and less error-prone code. When you create an element, such as a function or class, reusing it rather than duplicating the same code enhances the clarity and efficiency of the project.

In contexts such as Mendix, where elements can be reused across applications or modules, applying the DRY principle ensures that when changes are necessary, they can be made in a single location rather than multiple places. This not only saves time but also minimizes the risk of discrepancies and bugs that might arise from managing duplicated logic or data structures.

The other principles mentioned, while useful in their own contexts, do not specifically target the issue of reducing duplication in the same manner. KISS (Keep It Simple, Stupid) advocates for simplicity in design, SOLID focuses on object-oriented design principles to create more understandable software, and YAGNI (You Aren't Gonna Need It) advises against adding functionality until it is necessary. These may contribute to quality code and improved design,