Simplified multi-level ETS representation with different time scales for each level.
Two consecutive levels are shown. The time scale for the higher level is measured in coarser units:†††††††††††††††††† tí0†
corresponds to† t0† ,††††††† tí1†
to† t2 ,†††††††
tí2† corresponds to† t5†.
The contexts of the transformations are not identified.