My primary use of OO is in creating feature lists, object/entity lists, punch lists, etc. Often times these lists can be ordered in more than one way and the hierarchies can be built differently. A particular feature, for example, may belong to more than a single category or may have dependencies on other features.

My general need is the ability to create dependency or relationship links between items. Cloning/aliasing may help in this regard to the extent that an item might be included directly in the hierarchy of more than one parent. This could translate directly to my OG graphs which better represent the inter-dependencies but do not contain the descriptiveness of my OO lists.