Open - any reader can create it, edit it as they see fit. Incremental or Organic – develops over time, written by one or more authors. Universal - The mechanisms of editing and organizing are the same as those of writing so that any writer is automatically an editor and organizer. Materials are uploaded under the creative commons (CC) licence.
Wiki supporters generally feel that it is generally easier to correct mistakes than create content from scratch. Collaboration on projects moves it along quicker and hence wiki wiki