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An illustration of how these meta-layers relate to each other is shown in Figure 7.8. It should be noted that we are by no
means restricted to only these four meta-layers, and it would be possible to define additional ones. As is shown, the metalayers
are usually numbered from M0 and upwards, depending on how many meta-layers are used. In this particular case, the numbering
goes up to M3, which corresponds to MOF.
.