What is the CompletePlanet “browse tree”?
The CompletePlanet “browse tree” gets its name because it appears as an upside-down tree the lower level nodes are its branches. At the “root” there are 34 top-level domains (e.g., Agriculture & Food, References). Each level thereafter may be split into up to 34 or so sub-nodes, or more specific children subjects under a parent. These splits continue deeper and deeper into the tree, with topics getting progressively more specific. When you navigate from one level to the next deeper level, you are exploring one “branch” of the tree. To explore other branches, you can back up levels and then descend in different directions. On a combinatorial basis, the number of specific subjects using a tree structure can grow large rapidly. For example, CompletePlanet s five-level structure could lead to millions of specific subjects: 20 + 400 [20 * 20] + 8,000 [20*400] + 160,000 [20*8,000] + 3,200,000 [20*160,000] = 3,368,420 Of course, because some subjects are more or less comprehensive, the tree i
