User blog:Mark Otaris/Topic categories and set categories

There are two kinds of categories on a wiki: set categories and topic categories. To be able to use categories correctly, it is very important to understand the difference between the two. While topic categories are categories that contain pages relating to a certain subject, set categories are categories that contain page that describe an item that relates to a certain subject.

For example, take a page about a hat, let's say a visor ROBLOX published. The page about that hat would be categorized in the Hats category, which is a set category. That is because the hat which is the subject of that page is an hat.

On the other hand, a page relating to the subject of hats, like a page about gift hats, a page about visors, a page about selling limited hats or even literally the page about hats, would be categorized in the Hat category, which is a topic category, and which covers the subject of hats. That is because the page is a page concerning the topic of hats.

Set categories will usually be plural, like "Hats", "Packages", "Limited hats", etc. Topic categories, however, will usually be singular if they are nouns, or just directly indicate a topic, like "Building", "Package", "Hat", "Scripting", etc.

Is it very important to understand the distinction between the two. This means that, even though it is a page about hats, the Hats article should not be in the Hats category because it is not about a particular hat and the War group article should not be in the Groups category because it is not about a particular group. The former should be in the Hat category and the latter should be in the Group category. Usually, topic categories will contain fewer pages than set categories, though this is not a general rule.