A wiki is a web application that allows users to add and collectively edit (co-author) documents and web pages in a simple markup using a web browser.. The term wiki also refers to the collaborative software used to create such a website. In essence, the wiki is a vast simplification of the process of creating HTML pages, and thus is a very effective way to exchange information through collaborative effort.
A single page in a wiki is referred to as a "wiki page", while the entire body of pages, which are usually highly interconnected via hyperlinks, is called "the wiki". A defining characteristic of wiki technology is the ease with which pages can be created and updated. Generally, there is no review before modifications are accepted.
Tikiwiki is a product (brand) name for a popular Open Source wiki application.
Edit an existing page and join the page title for the new page together like so: UpperCamelCase. Alternatively, you can put the page title inside double parenthesis: ((My New Page)). When you save, you'll have a new wiki page link that looks like one of these: UpperCamelCase? or My New Page?
The question mark indicates that the new page doesn't exist yet. Click on the question mark to start editing your new page. Once the page is save, the questionmark disappears and the title becomes an active link.
There is a sandbox where you can experiment with wiki syntax: http://tikiwiki.org/tiki-index.php?page=SandBox
Try to use the description field (when you are editing) to give a terse but meaningful description of your wiki page. This is usually displayed just under the page title and when you hover the mouse over a link to the page.
When editing a page, the Quicklinks link will display a selection of edit buttons that you can use to mark up your page.
When editing a page, the "wiki help" button towards the bottom of the page will display a reminder of the wiki formatting syntax you can use. Also see WikiSyntaxHelp.
Tikiwiki is a full content management system including Blogs, Forums, Galleries, Workflow engine and much more. Most features are turned off initially, but the admin can activate any feature at any time by going to the Admin section.