[xsl] Validating a XML with 2 schemas, both required

Subject: [xsl] Validating a XML with 2 schemas, both required
From: Josir <josir@xxxxxxxxx>
Date: Wed, 03 Aug 2005 18:32:43 -0300
Hi folks,

I am learning how to do schemas and I'm doing fine since I tried to merge two xsd.

I want to force that my XML files uses a md5 signature described on http://www.w3.org/2000/09/xmldsig#

The XML below works fine:

<?xml version="1.0" encoding="UTF-8"?>
<Lista_AP_MS xmlns="www.media-systems-sc.com.br/namespace" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://www.media-systems-sc.com.br/namespace AP_MS.xsd http://www.w3.org/2000/09/xmldsig#";>

But this construction accepts but it does not require the <signature> tag.

How can I define the xsd to require both elements ?
Is this strategy the best one ?

Thanks in advance,

Josir Gomes
Rio de Janeiro - Brasil

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