1) NEW Introduced new simple type enumeration:

<xsd:simpleType name="WellTestType">

and changed inside <xsd:group name="grp_wellTest">

		<xsd:element name="testType" type="witsml:kindString" minOccurs="0">

to be

	<xsd:element name="testType" type="witsml:WellTestType" minOccurs="0">

2) NEW Introduced new simple type enumeration:

<xsd:simpleType name="FluidSampleComponents">

and changed inside <xsd:complexType name="cs_fluidResultComposition">

<xsd:element name="componentName" type="witsml:nameString"/>

to be

<xsd:element name="componentName" type="witsml:FluidSampleComponents"/>

3) NEW Introduced new attribute group for flow uid making it mandatory:

<xsd:attributeGroup name="flow_attgrp_uid">
		<xsd:attribute name="uid" type="witsml:uidString" use="required">
			<xsd:annotation>
				<xsd:documentation>The unique identifier of a container element. This attribute is generally required within the context of a WITSML server. There should be no
            assumption as to the semantic content of this attribute. This should only be used with recurring container types (i.e., maxOccurs greater than one). The value is only
            required to be unique within the context of the nearest recurring parent element.</xsd:documentation>
			</xsd:annotation>
		</xsd:attribute>
	</xsd:attributeGroup>
	
	
4) Made installation mandatory in production operation report

inside <xsd:complexType name="cs_productionOperationInstallationReport">

changed

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="0">

to be

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="1">


5) Made installation mandatory in production operation shutdown

inside <xsd:complexType name="cs_productionOperationShutdown">

changed

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="0">

to be

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="1">

6) Made installation mandatory in production operation third party processing

inside <xsd:complexType name="cs_productionOperationThirdPartyProcessing">

changed

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="0">

to be

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="1">

6) Made name mandatory in product volume facility

inside <xsd:complexType name="cs_productVolumeFacility">

changed

<xsd:element name="name" type="witsml:facilityIdentifierStruct">

to be

<xsd:element name="name" type="witsml:facilityIdentifierStruct" minOccurs="1">

7) Use mandatory flow uid attribute group in product volume flow

inside 	<xsd:complexType name="cs_productVolumeFlow">

changed

<xsd:attributeGroup ref="witsml:attgrp_uid">

to be

<xsd:attributeGroup ref="witsml:flow_attgrp_uid">

8) Made facility mandatory in fluid sample

inside <xsd:group name="grp_fluidSample">

changed

<xsd:element name="facility" type="witsml:facilityIdentifierStruct" minOccurs="0">

to be

<xsd:element name="facility" type="witsml:facilityIdentifierStruct" minOccurs="1">

9) Made installation mandatory in production operation 

inside <xsd:group name="grp_productionOperation">

changed

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="0">

to be

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="1">


10) Made installation mandatory in product volume

inside <xsd:group name="grp_productVolume">

changed

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="0">

to be

<xsd:element name="installation" type="witsml:facilityIdentifierStruct" minOccurs="1">


11) Removed minOccurs=0 in several places in product volume for dates (default minOccurs is 1)

inside <xsd:group name="grp_productVolume">

changed 

<xsd:choice minOccurs="0">
	<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="0">
		</xsd:element>
		<xsd:element name="dTimEnd" type="witsml:timestamp" minOccurs="0">
		</xsd:element>
	</xsd:sequence>
	<xsd:sequence>
		<xsd:element name="dateStart" type="witsml:date" minOccurs="0">
		</xsd:element>
		<xsd:element name="dateEnd" type="witsml:date" minOccurs="0">
		</xsd:element>
	</xsd:sequence>
	<xsd:element name="month" type="witsml:month" minOccurs="0">
	</xsd:element>
</xsd:choice>

to be

<xsd:choice minOccurs="0">
	<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">			
		</xsd:element>
		<xsd:element name="dTimEnd" type="witsml:timestamp">				
		</xsd:element>
	</xsd:sequence>
	<xsd:sequence>
		<xsd:element name="dateStart" type="witsml:date">			
		</xsd:element>
		<xsd:element name="dateEnd" type="witsml:date">				
		</xsd:element>
	</xsd:sequence>
	<xsd:element name="month" type="witsml:month">					
	</xsd:element>
</xsd:choice>

12) Made nameFluidSample and name mandatory in fluid analysus result

inside <xsd:complexType name="obj_fluidAnalysisResult">

changed

<xsd:element name="nameFluidSample" type="witsml:nameString" minOccurs="0">

to be

<xsd:element name="nameFluidSample" type="witsml:nameString" minOccurs="1">

and

changed 

<xsd:element name="name" type="witsml:nameString">

to be

<xsd:element name="name" type="witsml:nameString" minOccurs="1">

13)  Made name mandatory in fluid sample

inside <xsd:complexType name="obj_fluidSample">

changed

<xsd:element name="name" type="witsml:nameString">

to be

<xsd:element name="name" type="witsml:nameString" minOccurs="1">

14) Made nameWell mandatory in well test

inside <xsd:complexType name="obj_wellTest">

changed

<xsd:element name="nameWell" type="witsml:nameString">

to be

<xsd:element name="nameWell" type="witsml:nameString" minOccurs="1">

15) Renamed wellhead temperature to be DSCT and added line density to facility parameter enum

inside <xsd:simpleType name="FacilityParameter">

changed

			<xsd:enumeration value="wellhead temperature">
				<xsd:annotation>
					<xsd:documentation>The wellhead temperature</xsd:documentation>
				</xsd:annotation>
				
to be

			<xsd:enumeration value="wellhead temperature DSCT">
				<xsd:annotation>
					<xsd:documentation>The wellhead temperature downstream choke</xsd:documentation>
				</xsd:annotation>
			</xsd:enumeration>
			<xsd:enumeration value="line density">
				<xsd:annotation>
					<xsd:documentation>The density as measured along a given line</xsd:documentation>
				</xsd:annotation>
			</xsd:enumeration>
			
16) Made kind attribute required for facility identifier struct

inside <xsd:complexType name="facilityIdentifierStruct">

changed

<xsd:attribute name="kind" type="witsml:ReportingFacility" use="optional">

to be

<xsd:attribute name="kind" type="witsml:ReportingFacility" use="required">