-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.prodml.org/schemas/1series" version="PRODML_v1.3">
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 <xsd:include schemaLocation="typ_dataTypes.xsd"/>
 <xsd:include schemaLocation="typ_catalogProdml.xsd"/>
 <xsd:include schemaLocation="typ_dataTypesProdml.xsd"/>
 <xsd:include schemaLocation="typ_catalog.xsd"/>
 <xsd:include schemaLocation="cs_dtsCalibration.xsd"/>
 <xsd:include schemaLocation="cs_instrument.xsd"/>
-<xsd:group name="grp_dtsInstalledSystem">
-<xsd:annotation>
 <xsd:documentation>The group of elements corresponding to a DTS installed system.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="dateMin" type="prodml:timestamp" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The minimum date index contained within the object. The minimum and maximum indexes are server query parameters and will be populated with valid values in a "get" result. That is, all measurements for a well in the specified period defined by the min/max. See the WITSML API Specification appendix on "Special Handling" of growing objects for a description of the behavior related to this parameter.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dateMax" type="prodml:timestamp" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The maximum date index contained within the object. The minimum and maximum indexes are server query parameters and will be populated with valid values in a "get" result. See the WITSML API Specification appendix on "Special Handling" of growing objects for a description of the behavior related to this parameter.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="opticalPathLength" type="prodml:lengthMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The length of the fiber installed in the wellbore.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="opticalBudget" type="xsd:double" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Total light budget available for the installation. This is generally measured in decibels, and indicates the total power loss for two-way travel of the light in the installed fiber.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="opticalPathRef" type="prodml:refNameString" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Reference to optical path.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="instrumentBoxRef" type="prodml:refNameString" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Reference to instrument box.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="comment" type="prodml:commentString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Comment about this installed system.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dtsCalibration" type="prodml:cs_dtsCalibration" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>Calibration parameters vary from vendor to vendor, depending on the calibration method being used. This is a general type that allows a calibration date, business associate, and many name/value pairs. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
 </xsd:group>
 </xsd:schema>