Subgraphs Graphviz Example

A Graphviz example of clustered subgraphs (subgraph cluster_0) that draw labelled boxes around related nodes.

Any subgraph whose name starts with cluster is drawn as a bordered, labelled box — perfect for grouping a layered architecture. Here each subgraph cluster_N gets its own label and a shared node [style=filled, color=...], and edges that cross clusters (A -> C) still route correctly between the boxes.