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Defines the pattern for valid GUIDs.
<xs:simpleType name="guidType">
    <xs:restriction
        base="string"
    >
        <xs:pattern
            value="\{([0-9a-fA-F]){8}(\-[0-9a-fA-F]{4}){3}\-[0-9a-fA-F]{12}\}"
         />
    </xs:restriction>
</xs:simpleType>
Patterns
The guidType simple type is a string that is restricted by the following pattern:
- \{([0-9a-fA-F]){8}(\-[0-9a-fA-F]{4}){3}\-[0-9a-fA-F]{12}\}- A unique 128-bit number. 
Requirements
| Requirement | Value | 
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] | 
| Minimum supported server | Windows Server 2008 [desktop apps only] |