-<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="typ_dataTypes.xsd"/>
 <xsd:include schemaLocation="cs_statusRecord.xsd"/>
 <xsd:include schemaLocation="cs_event.xsd"/>
 <xsd:include schemaLocation="cs_fracStage.xsd"/>
 <xsd:include schemaLocation="cs_perforation.xsd"/>
 <xsd:include schemaLocation="typ_catalog_interval.xsd"/>
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-<xsd:group name="grp_wellboreInterval">
-<xsd:annotation>
 <xsd:documentation>The group of elements that are part of a wellbore interval.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="type" type="witsml:WellboreInterval" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The type of interval.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:choice minOccurs="0" maxOccurs="1">
-<xsd:element name="date" type="witsml:date" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The date when the interval was created.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dTim" type="witsml:timestamp" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The date and time when the interval was created.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:choice>
-<xsd:element name="topDepth" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The measured depth at the top of the interval.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="baseDepth" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The measured depth at the base of the interval.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="topTVD" type="witsml:wellVerticalDepthCoord" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The true vertical depth at the top of the interval.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="baseTVD" type="witsml:wellVerticalDepthCoord" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The true vertical depth at the base of the interval.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="perforation" type="witsml:cs_perforation" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>A description of the perforations in this interval.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="breakdownPressure" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Commonly specified for fraced intervals.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="fracStage" type="witsml:cs_fracStage" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>A description of a single fracturing stage.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="statusRecord" type="witsml:cs_statusRecord" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>A recording of a status with regard to the interval</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="event" type="witsml:cs_event" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>An event associated with the interval.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="comment" type="witsml:commentString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>A textual remark about the interval.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
 </xsd:group>
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 </xsd:schema>