<xs:attribute name="procedure-step-phase" use="required">
<xs:simpleType>
<xs:restriction base="xs:NMTOKEN">
<xs:enumeration value="revocation"/>
<xs:enumeration value="limitation"/>
<xs:enumeration value="appeal"/>
<xs:enumeration value="entry-regional-phase"/>
<xs:enumeration value="international-examination"/>
<xs:enumeration value="opposition"/>
<xs:enumeration value="fees"/>
<xs:enumeration value="international-search"/>
<xs:enumeration value="search"/>
<xs:enumeration value="undefined"/>
<xs:enumeration value="examination"/>
<xs:enumeration value="appeal-in-examination"/>
<xs:enumeration value="petition-for-review-in-examination"/>
<xs:enumeration value="appeal-in-opposition"/>
<xs:enumeration value="petition-for-review-in-opposition"/>
<xs:enumeration value="appeal-in-limitation"/>
<xs:enumeration value="petition-for-review-in-limitation"/>
<xs:enumeration value="appeal-in-revocation"/>
<xs:enumeration value="petition-for-review-in-revocation"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute> |