Project graph
The project graph contains all primary graphs of the project. Note that despite being called graph, they are more sub-graph of the project graph. It is possible to visualize each graph with the 2D graph display. Each project has one and only one project graph. The graphs presented bellow all belongs to the project graph and have different root. Thus, they are not connected together. As they still belongs to the same project graph, it is possible to create edges between them (but highly discouraged).
Main graph
The main graph is the graph user will mostly interact with. It contains the RGGRoot and Axiom. By default all objects insertion, and queries are applied to element of that graph.
Type Graph
The Type graph is part of the multiscale extention. All nodes of the Type graph are on extent index 8 by default. It contains the TypeRoot, SRoot, and TypeAxiom. The Type graph is used by the MSGraph (a model graph adapted for multiscale rules).
Additional root
You can create any root you want :O