how to specify in xml schema that either one of two fields must be present?
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        Published on 2010-03-26T13:57:07Z
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            2010/03/26
            16:43 UTC
        
        
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xml-schema
i want to specify that either fieldname or freetext is always present in xml files that apply to xsd. is there a way to define it?
<xs:complexType name="tSome">
<xs:sequence>
  <!-- either of 2 below have 2 be present. -->
  <xs:element name="fieldname" type="xs:string" minOccurs="0" />
  <xs:element name="freetext" type="xs:string" minOccurs="0" />
  <xs:element name="dbtablename" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
thanks & best regards: Matti
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