-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.witsml.org/schemas/131/addendum/combo" version="1.3.1">
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 <xsd:include schemaLocation="typ_dataTypes_New.xsd"/>
 <xsd:include schemaLocation="attgrp_uid.xsd"/>
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-<xsd:complexType name="cs_productFlowExternalReference">
-<xsd:annotation>
 <xsd:documentation>A reference to an external port within a different Product Flow Model. This value represents a foreign key from one element to another.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="port" type="witsml:refNameString" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>A pointer to the external port in the network that represents the current Model. This is the port to which a different model is being connected.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="connectedPort" type="witsml:refNameString" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>A pointer to the external port within the connected Model. This is the port on a different model to which the port on this model is connected.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="connectedModel" type="witsml:refNameString" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>A pointer to the Product Flow Model that contains the connected port.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="connectedInstallation" type="witsml:facilityIdentifierStruct" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The name of the facility that is represented by the connected model. The name can be qualified by a naming system. This also defines the kind of facility.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
-<xsd:attributeGroup ref="witsml:attgrp_uid">
-<xsd:annotation>
 <xsd:documentation>The unique identifier of the recurring element.</xsd:documentation>
 </xsd:annotation>
 </xsd:attributeGroup>
 </xsd:complexType>
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 </xsd:schema>