In your address bar you will see this “http://www.thedmxwiki.com/dmx_companies/template” the “/dmx_companies” part is called a namespace name spaces break things down into sections,

Then the “/template” is the page name, although the “/” breaks them up when writing wiki pages the wiki code uses “:” so for example an internal link would first not need the “http://www.thedmxwiki.com/” part it would just be dmx_companies:template to link to this page (Click edit page to see how I linked that)