Beware:Logical existance functoids

When looping one structure with many children into another single structure it would appear the use of the logical existance function does not a) restrict the output of some elements (ie. blank elements can appear) and b) results in one instance of the parent node for each instance of teh child.

A work around/better solution to this problem is to use the record count functoid and the logical greater than in combination. In other words checking the existance through the record count.

This method also works for two child records being joined into one parent. This type of mapping is not possible with the use of a logical OR and a logical existance. To achieve this one should use a record count a math ADD functiod and a greater than (0) functoid.