All The Tropes Wiki Project, Part XII

[Black Aeronaut]

Someone would need to convince me that tags and categories are actually different concepts.

A tagging system is more fluid and more granular.  Categories are meant to be broad.

Lessee, another way of looking at it...

In a library, Categories are more like how a dewey decimal system is set up; with specific number ranges representing specific topics.  However, tags are more like using a keyword search which only peripherally involves the the dewey decimal topic.

For example, you can look up the topic 'railroads' and pull up a vast quantity of information.  But you want something a little more specific such as rail line maps, so you use 'maps' as a keyword.  Or perhaps you're after locomotives of a specific era, so you use a year, say 1955, along with 'locomotives'.