EDT:How to Create/Edit Wiki pages
See Category:EDT if you're adding pages to the EDT wiki, especially the part about how to indicate that your page is part of the EDT category.
To make a new page, enter the URL for your new page in your browser. If you want it to be in the EDT category, include the "EDT:" prefix. For example, http://wiki.eclipse.org/EDT:My_EDT_wiki_page. You'll be told that there's no text in the page yet, as if the page already existed but was blank. Click on the Edit link and create your masterpiece.
Handy links to learn about editing these Wiki pages