In case someone is going to need it, here is Pete's suggestion:

The Master Schema

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" version="0.3"
   xmlns:hrm="http://www.hrmconsensus.org/layers">
	<xs:element name="xhrm">
		<xs:complexType>
			<xs:sequence>
				<xs:element name="device" type="xs:string"/>
				<xs:element minOccurs="0" maxOccurs="1" name="patient" 
				   type="xs:string" hrm:patientInfo="1"/>
			</xs:sequence>
		</xs:complexType>
	</xs:element>
</xs:schema>


Use xsl to convert it to a another xsd where patient info is required. I
tried to use result-document with it, but could not get the syntax correct. 

<?xml version="1.0"?>
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:hrm="http://www.hrmconsensus.org/layers">
  <xsl:output method="xml" indent="no"/>
  <xsl:template match="node()|@*">
    <xsl:copy>
      <xsl:apply-templates select="@*"/>
      <xsl:apply-templates/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="@hrm:patientInfo">
    <xsl:attribute name="minOccurs">
      <xsl:value-of select="1"/>
    </xsl:attribute>
  </xsl:template>
</xsl:stylesheet>


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From mike@s... Tue Apr 07 14:21:59 2009
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