A system for storing discussion threaded relationships includes a character map tree model tree for representing relationships of a topic and its descendent responses; an adjacency model for storing for each node in the tree a next key, a parent key, and root identifier; and an application server responsive to the character map tree model and adjacency model for selectively retrieving a topic and all descendants, including their relationships, creating a response and adding it as a child to a topic or response, deleting a topic or response and all its descendants, and retrieving topics in a folder.