<simpleType name="PhoneNumberStringType">
<annotation>
<documentation>Pattern-constrained string for phone numbers. Enforces basic phone number format validation.</documentation>
</annotation>
<restriction base="string">
<pattern value="(\+[0-9]( )?)?([0-9]( |-|\.|)){6,14}[0-9]|(\([0-9]{3}\)[-. ]?|[0-9]{3}[-. ])[0-9]{3}[-. ]?[0-9]{4} "/>
</restriction>
</simpleType>
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