From what I understand, a category doesn't exist until the page for the
category is edited, so even if there are categories listed on a page, unless those categories have been created, they do not actually exist until their description pages have been edited.
I ask this because I'm in charge of wiki that has a lot of blank categories (it was created from an XML dump made from content from another wiki engine that did not support categories in the MediaWiki sense), and I would like to mass add some text to all of these "wanted categories" so they can be properly indexed.
Is there a way to do this, or will I have to edit all these categories manually?