-<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="cs_datedComment.xsd"/>
 <xsd:include schemaLocation="typ_dataTypes_New.xsd"/>
 <xsd:include schemaLocation="typ_catalog_New.xsd"/>
 <xsd:include schemaLocation="typ_catalog_prodVol.xsd"/>
 <xsd:include schemaLocation="typ_dataTypes_prodVol.xsd"/>
 <xsd:include schemaLocation="attgrp_uid.xsd"/>
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-<xsd:complexType name="cs_productVolumePeriod">
-<xsd:annotation>
 <xsd:documentation>WITSML - Product Volume Period Component Schema.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="kind" type="witsml:ReportingPeriod" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The type of period that is being reported. If not specified and a time is not given then the period is defined by the reporting period.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:choice minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>A reporting period that is different from the overall report period. For example, a particular day within a monthly report. This period must conform to the kind of interval. If one value from a pair are given then both values must be given.</xsd:documentation>
 </xsd:annotation>
-<xsd:element name="dTim" type="witsml:timestamp" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The beginning date and time that the period represents.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:sequence>
-<xsd:element name="dTimStart" type="witsml:timestamp" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The beginning date and time that the period represents.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dTimEnd" type="witsml:timestamp" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The ending date and time that the period 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 period represents.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dateEnd" type="witsml:date" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The ending date that the period represents.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
 </xsd:choice>
-<xsd:element name="volume" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The uncorrected volume of the product. A positive value for an inlet port indicates flow into the port. A negative value for an inlet port indicates flow out of the port. A positive value for an outlet port indicates flow out of the port. A negative value for an outlet port indicates flow into of the port. This convention is designed such that a positive sign indicates an expected condition based on the intended port direction while a negative sign indicates an anomolous condition.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="volumeStd" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The volume of the fluid, corrected to standard conditions of temperature and pressure. The sign of the value should conform to the above description of volume.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="flowRate" type="witsml:volumeFlowRateMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The flow rate of the product. The sign of the value should conform to the above description of volume.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="temp" type="witsml:thermodynamicTemperatureMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Temperature of the product.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="pres" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Pressure of the product.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="mass" type="witsml:massMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The mass of the product.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="work" type="witsml:workMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The electrical energy represented by the product.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="comment" type="witsml:cs_datedComment" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>A timestamped remark about the amounts.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
-<xsd:attributeGroup ref="witsml:attgrp_uid">
-<xsd:annotation>
 <xsd:documentation>Unique identifier for the Product Volume Period. </xsd:documentation>
 </xsd:annotation>
 </xsd:attributeGroup>
 </xsd:complexType>
 </xsd:schema>