What is the limitation on sketch elements used to create relationships between sketch elements known as?

The term that describes the limitation on sketch elements used to create relationships between those elements is known as a constraint. In the context of CAD software, constraints are rules applied to sketch entities that control their behavior, such as their size, position, or relationship to other entities. For example, a horizontal constraint keeps a line parallel to the horizontal axis, while a vertical constraint ensures a line remains perpendicular.

Using constraints is essential for maintaining design intent in a sketch, as this allows for modifications and adjustments without losing the defined relationships. Constraints provide a structured framework for how sketch elements interact with one another, ensuring that any design changes respect the established relationships inherent to the sketch. This understanding of constraints is crucial for efficient parametric modeling and design processes in software like Autodesk applications.