Facilitate viewing different aspects
Facilitate assocation types - currently links are just lines having a style. I would like to be able to classify the association links (could be as simple as just allowing a label on the link, but that is probably a different concept from class of association).
I would then like to be able to hide / show links based on their classification.
I would also like to be able to arrange the graph as if a particular association classification was the parent/child (containment) link and the original containment link was treated as an association is treated now (no effect on layout).
This would allow me to focus on one aspect that is different than containment.
This relates to other suggestions of adding "multiple parents". My idea is a generalization of relationships that allows one containment relation per association class (parent/child, aspect/child), or free form associations (that works like associations do now).