<xs:element name="header">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element ref="note"/>
<xs:element ref="prop"/>
<xs:element ref="ude"/>
</xs:choice>
<xs:attribute name="creationtool" use="required"/>
<xs:attribute name="creationtoolversion" use="required"/>
<xs:attribute name="segtype" use="required">
<xs:simpleType>
<xs:restriction base="xs:NMTOKEN">
<xs:enumeration value="block"/>
<xs:enumeration value="phrase"/>
<xs:enumeration value="sentence"/>
<xs:enumeration value="paragraph"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name="o-tmf" use="required"/>
<xs:attribute name="adminlang" use="required"/>
<xs:attribute name="srclang" use="required"/>
<xs:attribute name= |