<pmr8317 thinking out loud>
Directories and Mind Paps and all that use visual connectors between blob shaped objects and positional text clues to indicate relationships.
relationships may be "crisp":
- parent/child (i.e. one includes the other - or - one to many)
- prerequisite ("do one before the other)
- statistical (sums or averages, etc)
or "fuzzy"
or Bayesian
<now what?>