The <LINK> element represents a hyperlink (see 7, "Hyperlinks"). Any number of LINK elements may occur in the <HEAD> element of an HTML document. It has the same attributes as the <A> element (see 5.7.3, "Anchor: A").
The <LINK> element is typically used to indicate authorship, related indexes and glossaries, older or more recent versions, document hierarchy, associated resources such as style sheets, etc.