<xs:complexType name="conferenceType">
<xs:choice>
<xs:element name="text" type="exch:textType"/>
<xs:sequence>
<xs:element name="conftitle" type="exch:conftitleType"/>
<xs:element name="confdate" type="exch:confdateType" minOccurs="0"/>
<xs:element name="confno" type="exch:confnoType" minOccurs="0"/>
<xs:element name="confplace" type="exch:confplaceType" minOccurs="0"/>
<xs:element name="confsponsor" type="exch:confsponsorType" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:choice>
</xs:complexType> |