<xsd:attributeGroup name="IRMRootNodeAttributeGroup">
<xsd:attribute ref="irm:DESVersion" use="required"/>
<xsd:attribute ref="icid:DESVersion" use="required"/>
<xsd:attribute ref="usagency:CESVersion" use="required"/>
<xsd:attribute ref="pm:CESVersion" use="optional"/>
<xsd:attribute ref="intdis:CESVersion" use="optional"/>
<xsd:attribute ref="mime:CESVersion" use="optional"/>
<xsd:attribute ref="icgenc:CESVersion" use="optional"/>
</xsd:attributeGroup>
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