Creating a Site Linking Match Pattern The Site Linking Match Patterns are entered on the SETTINGS Advanced Site Properties screen (Figure 10) and are made up of a special language called Regular Expressions. Figure 10 If you’re not familiar with Regular Expressions, there are many references available on the web. We’ve found this beginner’s guide helpful: http://www.zytrax.com/tech/web/regex.htm#positioning You do not need to be an expert in Regular Expressions. But, there are some common characters that are helpful when getting the expression to function properly. First, the Institution to which you are providing Secure Referrer URL access should give you the URL for the page from which their employees will be accessing your content. For example, a university might have their own company intranet site on which their employees will click on a link to access your content. Tizra needs to confirm that they are coming from a particular URL. Your customer will give you the URL such as: http://university.intranet.net/mod/page/view.php?id=180 The following is what was ultimately entered in the SETTINGS Advanced Site Properties in the Site linking matching pattern field in Tizra. Note the highlighted changes (described below): ^https?://university.intranet.net/mod/page/view.php\?id=180.* Caret: ^https?://university.intranet.net/mod/page/view.php\?id=180.* The ^ (circumflex or caret) means look only at the beginning of the target string. Putting a ^ at the beginning is almost always a good idea.