OpenLayers provides an easy way to configure the library file that gets included in your page. Throughout the book, we've been including a file called
OpenLayers.js, which is a file that contains all the functionality (classes, functions, and so on) that OpenLayers provides. So far, this has been great—we've been developing up to this point, so we want to be sure that we have access to all the classes that we may use. What's my point here?