The error message is the following:

<!-- Page Template Diagnostics
 Compilation failed
 xml.parsers.expat.ExpatError: unbound prefix: line 7, column 20
-->

Line 7 is exctly where the i18n tag is

----- Mensaje original ----
De: Andreas Jung <lists@zopyx.com>
Para: Daniel de la Cuesta <cues7a@yahoo.es>; zope@zope.org
Enviado: lunes, 13 de noviembre, 2006 1:51:49
Asunto: Re: [Zope] i18n tags in XML file using Page Templates

--On 13. November 2006 00:48:22 +0100 Daniel de la Cuesta <cues7a@yahoo.es>
wrote:

> Hi everybody,
>
> I am want to return an XML file with i18n tags using a page template.
>
> For example:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <language xmlns:tal="http://xml.zope.org/namespaces/tal";>
> <value i18n:translate="">My value</value>
> </language>
>
> When I use the i18n tag inside the page template I get a compilation
> error.

It would really help if you could include the complete *error message*.

-aj