The creation and update of pre-comp files always starts with the scene compositions, working its way down to the render layers and finally the render pass compositions.
The scene/layer/pass compositions are named accordingly: <scene anchor> <camera anchor> <layer anchor> <pass anchor>.
All nodes, including output nodes, in each type of composition can be renamed, since node anchors are used to keep track of the topology during import.
Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License