%CALCULATE{"formula"}% macro is handled by the SpreadSheetPlugin. There are around 90 formulae, such as $ABS(), $EXACT(), $EXISTS(), $GET()/$SET(), $IF(), $LOG(), $LOWER(), $PERCENTILE(), $TIME(), $VALUE(). This macro is uses the normal (left to right, inside out) Macro expansion order. If you need to evaluate after expanding table data, see CALC
%CALCULATE{"$EXISTS(Web.SomeTopic)"}% returns 1 if the topic exists
%CALCULATE{"$UPPER(Collaboration)"}% returns COLLABORATION