A system that allows a user to describe a tree or a set of trees in a table, and the system automatically generates a data structure corresponding to the tree or the set of trees in memory in accordance with the description. The system interprets a table with one or more columns wherein each of the node...http://www.google.co.uk/patents/US6003033?utm_source=gb-gplus-sharePatent US6003033 - System and method for describing and creating a user defined arbitrary data structure corresponding to a tree in a computer memory