-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.witsml.org/schemas/131" version="1.3.1">
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 <xsd:include schemaLocation="cs_geologyInterval.xsd"/>
 <xsd:include schemaLocation="cs_mudLogParameter.xsd"/>
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-<xsd:group name="grp_mudLog">
-<xsd:annotation>
 <xsd:documentation>The non-contextual content of a WITSML Mud Log object.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="objectGrowing" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Whether or not the mudLog is growing. True ("true" or "1") indicates the that the mudLog is still growing in size (that is, geologyInterval or parameter values are still being added). For example, it may be connected to a realtime stream. False ("false" or "0") indicates that the mudLog is closed (that is, no further geologyInterval or parameter values will be added). Not given indicates that the status of the mudLog is not known. This value is only relevant within the context of a server.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dTim" type="witsml:timestamp" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Date and time the information is related to. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="mudLogCompany" type="witsml:nameString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Name of the company recording the information. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="mudLogEngineers" type="witsml:descriptionString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Concatenated names of mud loggers constructing the log. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="startMd" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The minimum mdTop value in all geologyIntervals for this mud log message. This will be populated by the server to match the values that were returned as a result of a query. Used in a query template for specifying the begining range of logs to be retrieved.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="endMd" type="witsml:measuredDepthCoord" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The maximum mdBottom value in all geologyIntervals for this mud log message. This will be populated by the server to match the values that were returned as a result of a query. Used in a query template for specifying the ending range of logs to be retrieved. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="relatedLog" type="witsml:refNameString" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>A foreign key to a related Log. This is a pointer to a log that is related to the mud log. The log may or may not have been created as a result of the mudlogging process. The log must represent the same well and wellbore as the mud log.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="parameter" type="witsml:cs_mudLogParameter" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>A single mud log parameter.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="geologyInterval" type="witsml:cs_geologyInterval" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>Set of geology and drilling information records for the wellbore. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
 </xsd:group>
 </xsd:schema>