Addventures, by their nature of discrete segments of writing connected to each other by paths, generally follow a conceptual tree structure. Each individual written section is a node, usually with one parent node and zero or more child nodes. Extending the addventure with new writing then becomes a task of choosing the node that one wants and adding a new child to it, with the new material comprising the content of the child. An addventure generally begins with a single room or chapter (the root node of the tree), and is extended by writers from that point.