Mnemosyne Organization System

[kro...@gmail.com]

Hi,

This isn't related to Mnemosyne so much as the way Mnemosyne organizes things. Sorry if I have placed this in the wrong forum. Any thoughts appreciated, here is my issue:

The card organization system Mnemosyne uses is well designed. You can structure card in hierarchy as well as create tags so that cards belong to different groups at the same time. It also allows you to search by both or particular words.

What would you call this kind of organization system? I ask because I am trying to organize a good amount of information of text (possibly media - images, links, video, 3D rendering) so that the information is dynamic like Mnemosyne allows. Nesting things in multiple lists so that depending on what category a person is searching for they get different sets of information (which fill the category). Do any one know of programs that do this?

Thank you.
Kyle