All categories categorized

Guideline	Every category in the wiki should be categorized into at least one logical parent category.
Add'l info	The wiki will maintain one root category, which will serve as the top level of the category hierarchy. A category can be a sub-category of multiple parent categories.
Examples	Example: Example 1 that illustrates the meaning, or gives suggestions of how to implement the guideline Example 2

Discussion

Categories are a useful navigation tool enabling educators and learners to find available resources. (See the related guideline All pages categorized.) Requiring that all categories be a sub-category of at least one other category will create a web of hierarchical connections, and notably not a strictly hierarchical tree, but rather a collection of overlapping trees. This web of connections is a valuable tool for exploring related resources. --Alison Snieckus 13:49, 9 October 2009 (UTC)