enum ColumnKey { kNoColumn = 0, kItem = 1, kX, kY, kPolarRadius, kPolarAngle, kZ, kDiameter = 7, kRadius, kDepth, kXZAngle, kYZAngle, kDesc = 12, kStd, kIndex, kHcOrigin, kParentOrigin = 16, kLabel, kHoleItem, kHoleIndex, kQuantity, kUserItem };