<BASE> Tag & its Attribute
HTML Tag <BASE>
<BASE> Identifies the location where all relative URLs in your document originate.
Attribute of <BASE> Tag
HREF
Indicates the relative or absolute location of the base document.
<BASE HREF="http://www.cs-tutorial.com/pdf>
Possible Values
URL
TARGET
Identifies in which named frame you load a document (see the HREF= attribute).
<BASE HREF="http://www.cs-tutorial.com/pdf/"
TARGET="main">
Possible Values
_blank
_parent
_self
_top
framename