The illustration below displays an
Extensions node with subnodes aggregated under it.

Notes:
- Selecting an element in a node under the Extensions node, selects it as well in the original Logical node.
- All the line ID commands are supported by the piping objects available in the subnodes of the Extensions
node.
- Equipment
- The Equipment node aggregates equipment present in the system and the
ports of the equipment.

- Line ID
- The Line ID node aggregates the line IDs present in the system and the
members of the line ID.

Note:
When a piping object is transferred as the member of a piping line, it is
removed from its respective node. It is then added under the Line
ID node of which it becomes the member.
- Fluid Part
- The Fluid Part node aggregates the piping components present in the
system and the nodes of the piping components.

- Fluid Route
- The Fluid Route node aggregates pipes present in the system and the nodes of the pipe.
