BooleanExpression

A BooleanExpression evaluates to a Boolean value.

Code example

CatItem.Exists.Assign(ArticleView.Current.Nr.IsNull().IsTrueElse(BooleanExpression.Null, TRUE)),

In this example the field Exists (a Boolean) of CatItem is going to be assigned. If the Nr of the current record of ArticleView is NULL, an empty BooleanExpression is assigned. Otherwise TRUE will be assigned.