<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
    <xs:include schemaLocation="DECOR.xsd"/>
    <xs:element name="questionnaire" type="QuestionnaireType">
        <xs:unique name="questionnaire-desc-language-unique">
            <xs:selector xpath="desc"/>
            <xs:field xpath="@language"/>
        </xs:unique>
        <xs:unique name="questionnaire-purpose-language-unique">
            <xs:selector xpath="purpose"/>
            <xs:field xpath="@language"/>
        </xs:unique>
        <xs:unique name="questionnaire-copyright-language-unique">
            <xs:selector xpath="copyright"/>
            <xs:field xpath="@language"/>
        </xs:unique>
    </xs:element>
</xs:schema>
