Link

Element: <link>
Start tag: required
End tag: forbidden
Attributes: charset, href, hreflang,
  type, rel, rev, media. id, class,
  lang, title, style, onclick,
  ondblclick, onmousedown, onmouseup,
  onmouseover, onmousemove, onmouseout,
  onkeypress, onkeydown, onkeyup,
  more attribute info here

<link> is placed in the <head> tags and allows you to supply information about the document and it's relation to other documents. Attributes are charset, href, hreflang, type, rel, rev, and media. charset specifies the characterset of the document. href is used to supply a URL. hreflang specifies the language of the document. type specifies the content type. rel specifies the document's forward relation to others. rev specifies the document's backward relation to others. media specifies the document's media type.

<link href="page7.html" rel="Next">
<link href="page6.html" rel="Prev">
<link href="french.html" hreflang="fr" rel="otherversion" type="text/html">