Over the past two years, Drupal's wiki capabilities have expanded exponentially. Yet, still we get support requests on the forums, "How can I make a wiki with Drupal?" Well, here is a detailed plan that gives wiki functionality to Drupal. This tutorial assumes you're starting with an installed version of Drupal 5.x, and that you're familiar with installing modules.
There is often this request: I want to be able to categorize my wiki pages into a hierarchy. Well, with Drupal core's book module, you can do just that! First, enable the book module. Then, go to the admin/content/types page to view your content types. Delete any content types you don't want. Then, rename the "Book page" content type to "Wiki page" or something similar. Also, in the "workflow" fieldset, make sure to check the "create new revision" checkbox. This will make it so that, by default, every edit of a page is done in a revision.
The wikitools module is an essential for all Drupal wikis. From deletion protection, to move protection, to ensuring that there is only one page for each title, wikitools is the future of Drupal wikis. Install it, and then configure the settings on the admin page to fit into your idea of how your wiki should work.
There are several ways of doing this. I recommend the pearwiki filter module, as it allows for much flexibility. However, also consider the freelinking module, which is easier to install. If you use the freelinking module, you will have to check the "Hijack freelinking module" checkbox on the wikitools install page. Then, configure your input format with the appropriate filters.
At the admin/user/access page, configure user permissions. Here are some recommended settings:
Of course, feel free to alter these settings as appropriate to your site.
Now that you've read this article, do you have any more ideas? Perhaps you have another cool wiki Drupal tip to share? Or maybe you want to implement some wiki-style Drupal features, but aren't sure how. Or else you're trying out some of the things I suggested, but having trouble? Feel free to post a comment below; I'd love to hear what you have to say.