When looking at any complex relational system (especially in software, where our diagrams are limited by object scope), how do we see all the connections? How do we see and understand all objects, cases, states and methods (actions) regardless of the entire mutually inclusive and exclusive scope?

The standard method for showing hierarchical relationships, both inclusive and exclusive, is to use multiple diagrams for modeling those relationships between domain objects and related phenomena. The problem with this is that using multiple diagrams to portray a top-level view can lead to confusion and redundancy. Often, it would be extremely helpful to be able to have a single macro view of the data/objects and all relationships, rather than relying on piecing together multiple micro diagrams to achieve the same effect. It requires a higher level of abstraction to view complex data/objects on a macro level, and unfortunately, as we abstract we also lose detail.

What if there was a way to reduce all relational hierarchy to a single diagram without a significant loss in detail?