How to use rel canonical?

[informatica810]

Hi, I am having some questions about this and I think you can help me on this.

Here I have the example of my problem:

pagination:

Suppose that I have a new with 2 pages

http://www.espectador.com/noticias/208907/fernando-pereira-encuesta-de-cifra-prendio-una-lucecita-amarilla-en-el-pit-cnt

you can access the first page by different ways:

www.espectador.com/1v4_contenido.php?m=&id=250419&ipag=1

http://www.espectador.com/1v4_contenido.php?m=&id=250419

http://www.espectador.com/noticias/250419/alvaro-vega-fa-creo-que-cosmo-fue-usada-por-bqb-para-evitar-una-subasta-a-la-baja-y-asi-quedar-con-las-manos-libres

Same meta descr, same body with different URLs.

Can I use rel canonical in the file 1v4_contenido.php that point to the friendly url?

<link rel="<a class="attribute-value">canonical</a>" href="[http://www.espectador.com/noticias/250419/alvaro-vega-fa-creo-que-cosmo-fue-usada-por-bqb-para-evitar-una-subasta-a-la-baja-y-asi-quedar-con-las-manos-libres](view-source:http://www.espectador.com/noticias/250419/alvaro-vega-fa-quotcreo-que-cosmo-fue-usada-por-bqb-para-evitar-una-subasta-a-la-bajaquot-y-asi-quotquedar-con-las-manos-libresquot)"/>

do I have a loop here?

The rel canonical can goes in the page 1?

Thanks

[Bryan_Loconto]

Hi Nico,

This article should help: http://www.seomoz.org/blog/canonical-url-tag-the-most-important-advancement-in-seo-practices-since-sitemaps