A Server Side Include (SSI) is a facility available via a Server for including tagging within a HTML document that provides instructions to the Server to retrieve the contents of another HTML document held on that same Server and paste this into the intial document. The MurdochNet Host utilises Server Side Includes to offer navigation bars. When an end-user views the HTML source via their Web browser, the content of the Server Side Include will have been pasted into the document, thus what the end-user sees is not only the HTML tagging of the document, but also the tagging of one or more other documents.