2.2.5.5 guid (from namespace http://schemas.microsoft.com/2003/10/Serialization/)
Reserved.
MUST be ignored.
-
<xs:simpleType name="guid">
<xs:restriction base="xs:string">
<xs:pattern value="[\da-fA-F]{8}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{12}"/>
</xs:restriction>
</xs:simpleType>