<?xml version="1.0" encoding="utf-16"?> <xs:element name="ReferenceUriSchemesSupported"> <xs:complexType> <xs:sequence> <xs:element name="ReferenceUriScheme" minOccurs="0" maxOccurs="unbounded"> <xs:simpleType> <xs:union memberTypes="pwg:ReferenceUriSchemesWKV pwg:StringNsExtensionPattern" /> </xs:simpleType> </xs:element> </xs:sequence> </xs:complexType> </xs:element>