... The idea is that every page that falls into a particular subject area should have a link to a shared page containing links to other pages on that subject. These pages are created in the Category group, and thus these subject areas are called "categories". ... A page author can also link to a category list without adding the linking page to the category by using [[ {Category.Subject$PageUrl} | ... For instance the following will list pages in the Category group, put it on page Category.Category ? ...