This will

• unparent all given object and attribut them a specific tag with, for instance (this will unparent 3 object and tag thjem as myTag)

PUPunparent myTag "object1 object2 object3";

• Then, after some process, reParent the given tag to their original parents with PUPreparent (this will reparent all object unparented under myTag):

PUPreparent myTag;

It is usefull if for any reason, the rig process fail because of the presence of some children on rig object. Then, place PUPunParent before the process, and PUPreParent after.