As you may remember from Chapter 2, where input formats and filters were introduced, all of our content is passed through the filters included in the designated input format before being displayed. The users enter whatever crazy text they want on input, and then Drupal filters and modifies that text on output.
One of the requirements for our site is to allow easy formatting and linking when writing content. The Markdown and Freelinking filters allow us to do just that. We are going to create a new input format for our wiki that uses a few core filters along with our contributed ones. The steps described in the following sections include:
1. Configuring the filters editor site administrator
2. Creating the wiki input format
3. Setting up format permissions
4. Adding content
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