<xs:restriction base="xs:string"> <xs:enumeration value="A0_LANDSCAPE"/>
<xs:enumeration value="A0_PORTRAIT"/>
<xs:enumeration value="A1_LANDSCAPE"/>
<xs:enumeration value="A1_PORTRAIT"/>
<xs:enumeration value="A2_LANDSCAPE"/>
<xs:enumeration value="A2_PORTRAIT"/>
<xs:enumeration value="A3_LANDSCAPE"/>
<xs:enumeration value="A3_PORTRAIT"/>
<xs:enumeration value="A4_LANDSCAPE"/>
<xs:enumeration value="A4_PORTRAIT"/>
<xs:enumeration value="A5_LANDSCAPE"/>
<xs:enumeration value="A5_PORTRAIT"/>
<xs:enumeration value="A6_LANDSCAPE"/>
<xs:enumeration value="A6_PORTRAIT"/>
<xs:enumeration value="LETTER_LANDSCAPE"/>
<xs:enumeration value="LETTER_PORTRAIT"/>
</xs:restriction>