Expression Filter (EXPFILTER) Element

The Expression Filter element is used to define matching criteria, rows are present in the resulting Database View table for each element that has a particular element type (ELEL) and meets any defined criteria (ATTFILTER and EXPFILTER). Additionally if element match criteria cannot be expressed using attribute filters then it is possible to define an expression for evaluation. All EXPFILTER criteria must be met for a row to be present in the table.