In the hypertext architecture, when making a reference, such as a hypertext link, we don't just refer to an information resource. Well, we can, but we can also refer to a particular part of or view of a resource. The string which, within the document, defines the other end of the link has two parts. It has the identifier of the document as a whole, and then optionally it has a hash sign "#" and a string representing the view of the object required.