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Links and search engines

Authors may use the LINK element to provide a variety of information to search engines, including:

  • Links to alternate versions of a document, written in another human language.
  • Links to alternate versions of a document, designed for different media, for instance a version especially suited for printing.
  • Links to the starting page of a collection of documents.

The examples below illustrate how language information, media types, and link types may be combined to improve document handling by search engines.

In the following example, we use the hreflang attribute to tell search engines where to find Dutch, Portuguese, and Arabic versions of a document. Note the use of the charset attribute for the Arabic manual. Note also the use of the lang attribute to indicate that the value of the title attribute for the LINK element designating the French manual is in French.

<HEAD>
<TITLE>The manual in English</TITLE>
<LINK title="The manual in Dutch"
      type="text/html"
      rel="alternate"
      hreflang="nl" 
      href="http://someplace.com/manual/dutch.html">
<LINK title="The manual in Portuguese"
      type="text/html"
      rel="alternate"
      hreflang="pt" 
      href="http://someplace.com/manual/portuguese.html">
<LINK title="The manual in Arabic"
      type="text/html"
      rel="alternate"
      charset="ISO-8859-6"
      hreflang="ar" 
      href="http://someplace.com/manual/arabic.html">
<LINK lang="fr" title="La documentation en Fran&ccedil;ais"
      type="text/html"
      rel="alternate"
      hreflang="fr"
      href="http://someplace.com/manual/french.html">
</HEAD>

In the following example, we tell search engines where to find the printed version of a manual.

<HEAD>
<TITLE>Reference manual</TITLE>
<LINK media="print" title="The manual in postscript"
      type="application/postscript"
      rel="alternate"
      href="http://someplace.com/manual/postscript.ps">
</HEAD>

In the following example, we tell search engines where to find the front page of a collection of documents.

<HEAD>
<TITLE>Reference manual -- Page 5</TITLE>
<LINK rel="Start" title="The first page of the manual"
      type="text/html"
      href="http://someplace.com/manual/start.html">
</HEAD>

Further information is given in the notes in the appendix on helping search engines index your Web site.
 
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 Article # 651
 Posted on 19-11-2008
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