<xs:group name="AllCommunicationChannelsGroup">
<xs:choice>
<xs:element ref="CommunicationChannel.PhysicalAddress" />
<xs:element ref="CommunicationChannel.EMail" />
<xs:element ref="CommunicationChannel.Phone" />
<xs:element ref="CommunicationChannel.WWW" />
<xs:element ref="CommunicationChannel.Other" />
</xs:choice>
</xs:group>
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