Add an Operator Contribution subnode () under an Expression Operator node to override the operator’s defining expression on a subset of the parent’s selection, including entities of lower dimension.

In this section, define the selection for the contribution to the Expression Operator under which you have added this subnode. By default, the Geometric entity level is set to Domain, but it is also possible to override the default expression only on entities of lower dimension.

In the Expression field, enter an alternate expression for the Expression Operator defined by the parent node, to be used on the Operator Contribution’s selection. The dimensions of the expression are checked and expected to agree with the operator dimensions derived from the default expression.