A model variation reference allows you to include the operations of other model variations within the current variation. This enables reuse of common variation operations across multiple model variations without duplicating them.

When executed, each referenced model variation is applied in order, executing all of its operations.

Circular references are not allowed. If variation A references variation B, and variation B references variation A, this is detected during validation and reported as an error.

A warning is shown if no variations are referenced.