PBSObjectNode

The first PBSObjectNode is named (Equipment) so that it can be referenced in the formula for the second level PBSObjectNode. The display name of each element is set by its "FLNN" attribute. The set of elements at this level in the tree view is determined by a PML formula (COLLECT ALL EQUI).

The second level PBSObjectNode is defined within the first PBSObjectNode. This is named (Nozzles), each element is given a display name (FLNN), and is determined by a PML formula.

Note:
That this time the formula refers to the parents name (Equipment), so that only the nozzles beneath the parent equipment element are displayed as child nodes.