<base> element specifies a default base address for all the links on a page.
In HTML links and references to external resourses such as images and scripts are made using a URI (address).
The default or base address used is that of the current page with URI's being resolved relative to the current page address. Using the
element in the 'head' section of a document you can set a different default address for all the links in that page.
- href - REQUIRED - the location of the new base address.