Rule editor

The rule editor is used in several structural elements.

A rule is a logical expression composed of individual components in a tree structure. The starting point of the rule is the rule root element.

Rule root element

If a rule has only the rule root element, the resulting expression of the rule is True.

Now additional components can be added to the rule:

Rule component	Description
List	A list that is provided with a control variable (influencing factors) and has a control operator. Individual values or expressions are added to the list that are assembled into a subexpression of the rule using the common control operator.
Expression	A subexpression that can be freely defined, for example, to store the equality of two characteristics.
Exclusive Or	A subexpression that must have additional components that are evaluated exclusively OR (Xor). For Xor, the left element can be True or the right element, but not both.
Negation	A subexpression that negates subsequent elements.
Touch	An expression that is already filled with the appropriate touch expression. Touch checks that a characteristic or object has a set touch attribute, i.e. has been modified by the user in a form.
Not Touch	An expression that is already filled with the appropriate NotTouch expression. Touch checks that a feature or object has a set touch attribute, i.e. has been modified by the user in a form.

Arrangement of the rule components

Starting from the rule root element are two branches that lead to the last element. The rule is true if all rule components in a branch are logically True.

The resulting expression is

(Products.[Production site] = 'Stuttgart') Or (Products.[Country version] = 'US')

AND

Starting from the rule root element there is one branch that lead to the last element. The rule is true if all rule components in a branch are logically True.

The resulting expression is

((Products.[Production site] = 'Stuttgart') And (Products.[Country version] = 'US'))