Simple conditions can be used to create simple constraints. For example, you can use them to set up the condition for which the user, while configuring the lamp, cannot select a red shade if he or she has selected plastic for the material. If the user selects a red shade, value 'plastic' will no longer be available for material. Simple conditions consist of a field compared with a value. Simple conditions can consist of one or more lines. In that case, the lines are combined by a logical OR.

Array variables can be referred to either by number or without number. If used without number, the expression is applied to any index value.

1. Repeat the first six steps described in the Create validation ruletopic.

2. Click the Conditiontab.

3. Press CTRL+N to create a new condition.

4. Select Simplein the Typefield.

5. In the Simple conditionfield group, press CTRL+N.

6. In the Variablefield, select the variable that will be used for the condition.

7. If the selected variable belongs to the array group, type its number in the Indexfield.

8. In the Operatorfield, select an operator for the current line.

9. In the Type, select whether the variable specified in the Variablefield will receive a specific value or will be calculated according to a formula.

   • If you selected Value, specify it in the Valuefield.

   • If you selected Calculated, click Calculatedto create a formula.

10. Click the Messagetab to create a message that will appear if the condition is TRUE. Select the language in which you will write the message and then type the message text.