fox formular - referencing data objects

Hi all,

as i understood the data that is restricted in my planning level/package is devided into so called data objects and for each of these data objects my fox formular is calculated. In my case i have 2 data objects and i need the data from one object to make a calculation inside the other. One way to achieve this is merging the two data objects into one, but this leads to a quite many "fields to be changed" in my planning function. Is there another way to make a reference between data objects?

Thanks,

Holger