| | 71 | Fragments can contain regions, so topology descriptions can be recursive. These topology descriptions are used to allocate testbed resources, so the model insures that all recursions terminate. Each region is assigned a non-negative integer valued level. The outermost specification of topology can has region levels assigned by the user. When a region is inserted into a topology as a member of a fragment that replaces a region, we assign all regions in that replacement a level one less than the region that was expanded. |
