<xs:complexType name="IdentifiersType" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:annotation>
    <xs:documentation>List of unique identifiers</xs:documentation>
  </xs:annotation>
  <xs:sequence>
    <xs:element name="Identifier" type="IdentifierType" nillable="false" maxOccurs="unbounded" />
  </xs:sequence>
</xs:complexType>