Changes in HTML 5 - <base/> Tag
What's new in HTML 5
The target
attribute has been added for consistency with the <a> tag.
Differences between HTML 5 and earlier versions of HTML
In previous versions of HTML, the value of the <base href> attribute was required to be an absolute URL. In HTML 5, it can be resolved relative to the address of the document.
In ployglot HTML documents the <base/>
tag is coded as a self-closing tag the same as in the 2000-2010 Recommendations from the W3C HTML Working Group. Those specifications changed the ending delimiter to />
from >
in older recommendations. They also defined the HTML namespace for the base element type name and the names of other HTML element types.