-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.witsml.org/schemas/131/addendum/combo" version="1.3.1">
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<!--
                                                         
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 <xsd:include schemaLocation="cs_businessAssociate.xsd"/>
 <xsd:include schemaLocation="cs_installationReport.xsd"/>
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-<xsd:group name="grp_productionOperation">
-<xsd:annotation>
 <xsd:documentation>The non-contextual content of a WITSML Production Operation object.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The name of the facility which is represented by this report. The name can be qualified by a naming system. This also defines the kind of facility.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="contextFacility" type="witsml:facilityIdentifierStruct" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>The name and type of a facility whose context is relevant to the represented installation.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="kind" type="witsml:kindString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The type of report.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="periodKind" type="witsml:ReportingPeriod" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The type of period that is being reported. This value must be consistent with the reporting start and end values.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:choice minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The reporting period. If one value from a pair are given the both values must be given.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="dTimStart" type="witsml:timestamp" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The beginning date and time that the report represents.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dTimEnd" type="witsml:timestamp" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The ending date and time that the report represents.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
-<xsd:sequence>
-<xsd:element name="dateStart" type="witsml:date" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The beginning date that the report represents.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dateEnd" type="witsml:date" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The ending date that the report represents.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
 </xsd:choice>
-<xsd:element name="operator" type="witsml:cs_businessAssociate" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The operator of the facilities in the report.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="title" type="witsml:nameStruct" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The tile of the report if different from the name of the report.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="geographicContext" type="witsml:cs_geographicContext" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The geographic context of the report.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="issueDate" type="witsml:date" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The date that the report was issued.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="issuedBy" type="witsml:cs_businessAssociate" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The person or company that issued the report. This may contain the role of the person or company within the context of the report.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="approvalDate" type="witsml:date" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The date that the report was approved.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="approver" type="witsml:cs_businessAssociate" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The person or company that approved the report. This may contain the role of the person or company within the context of the report.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="installationReport" type="witsml:cs_installationReport" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>A report for each installation</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
 </xsd:group>
 </xsd:schema>