Set built in attributes within rule file

Discussion created by d_l_smith on Mar 26, 2012
Latest reply on Mar 27, 2012 by MBuehler-esristaff
Hi, I am having a mind blank today - Is it possible to access and change a built in attribute via the set() function? Considering street networks; I am wanting to set the builtin streetWidth attribute based on the number of lanes and lane width given in the rule file, for an ideal outcome see:

set(streetWidth, (nLanes * laneWidth)