Tree

A tree is a connected, undirected information structure of directories, subdirectories and files through which a user can move to locate information. Mathematically speaking, a tree is an acyclic graph, which always branches upwards. In the WWW, unlike the real world, a tree can branch in any direction.

URLs:

The Structure of the NGB Internet Pages

The Nordic Gene Bank has the most appealing description of its tree, likening users to squirrels who are free to travel well-marked branches forwards, and backwards, and to leap to new branches in order to reach their information.

W3E References:

document tree

hierarchical structure

tree structure

Print References:

• IBM Dictionary of Computing by George McDaniel. McGraw Hill, New York, 1994 (ISBN: 0-07-113383-6)
• the World Wide Web Unleashed by John December and Neil Randall. Sams Publishing, Indianapolis, IN, 1995. (ISBN: 0-6723-0737-5)