type: bool, default:
Whether to use a single global ranking, ignoring clusters.
The original ranking algorithm in
dot is recursive on clusters. This can
produce fewer ranks and a more compact layout, but sometimes at the cost of a
head node being place on a higher rank than the tail node. It also assumes
that a node is not constrained in separate, incompatible subgraphs. For
example, a node cannot be in a cluster and also be constrained by
with a node not in the cluster.
This allows nodes to be subject to multiple constraints. Rank constraints will usually take precedence over edge constraints.Valid on: