-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.witsml.org/schemas/1series" version="1.4.1">
<!--
 -->
<!--
 Energistics License Agreement
	This file is distributed under the Energistics License Agreement at
	http://www.energistics.org
	Use of this file constitutes agreement with the Energistics License Agreement.
	Copyright (c) 2011 Energistics. All rights reserved.
	Energistics, WITSML, PRODML and RESQML are trademarks or registered trademarks of Energistics.
 -->
<!--
 -->
 <xsd:include schemaLocation="typ_measureType.xsd"/>
 <xsd:include schemaLocation="typ_catalog.xsd"/>
 <xsd:include schemaLocation="attgrp_uid.xsd"/>
<!--
 -->
-<xsd:annotation>
 <xsd:appinfo>Modified-in-version=1.4.1, By-issue=27, Change=Deleted-type:indexCurve</xsd:appinfo>
 <xsd:appinfo>Modified-in-version=1.4.1, By-issue=27, Change=Deleted-type:timestampedDescriptionString</xsd:appinfo>
 </xsd:annotation>
<!--
 -->
<!--
 ================ DATE AND TIME TYPES  =================
 -->
<!--
 -->
-<xsd:simpleType name="date" final="#all">
-<xsd:annotation>
 <xsd:documentation>A julian date.</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractDate"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="timestamp" final="#all">
-<xsd:annotation>
 <xsd:documentation>A date with a time of day and a mandatory time zone offset. This must captute the correct date-time relative to UTC. It is not necessary to use a local time zone because software may convert the date-time to a different local time zone (while retaining correct date-time relative to UTC). See acquisitionTmeZone in commonData for the original time zone of times in an object.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-39, Change=Modified-description</xsd:appinfo>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-39, Change=Modified-constraint</xsd:appinfo>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractDateTime">
 <xsd:pattern value=".+T.+[Z+\-].*"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="timeZone" final="#all">
-<xsd:annotation>
 <xsd:documentation>A time zone conforming to the XSD:dateTime specification.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-39, Change=Changed-type-from:abstractString</xsd:appinfo>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractTimeZone"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:complexType name="timestampedTimeZone" final="#all">
-<xsd:annotation>
 <xsd:documentation>A local time zone conforming to the XSD:dateTime specification. The dTim attribute can capture when the local time zone changed. The use of this type is generally related to a specific (set of) date and time for which the original time zone needs to be captured.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-39, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractTimeZone">
-<xsd:attribute name="dTim" type="witsml:timestamp" use="optional">
-<xsd:annotation>
 <xsd:documentation>The date and time when this local time zone became active. This value must be defined on the second and subsequent occurrences.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:simpleType name="calendarYear" final="#all">
-<xsd:annotation>
 <xsd:documentation>A calendar year (CCYY) in the gregorian calendar. This type is meant to captute original invariant values. It is not intended to be used in "time math" where knowledge of the time zone is needed.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-53, Change=Changed-type-from:abstractYear</xsd:appinfo>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-53, Change=Modified-constraint</xsd:appinfo>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractInt">
 <xsd:minInclusive value="1000"/>
 <xsd:maxInclusive value="9999"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
<!--
 =============== MISCELLANEOUS TYPES  ==================
 -->
<!--
 -->
-<xsd:simpleType name="logicalBoolean" final="#all">
-<xsd:annotation>
 <xsd:documentation>Values of "true" (or "1") and "false" (or "0").</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractBoolean"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:complexType name="yAxisAzimuth" final="#all">
-<xsd:annotation>
 <xsd:documentation>The angle of a Y axis from North. This is a variation of planeAngleMeasure with an attribute defining the direction of north.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
-<xsd:attribute name="uom" type="witsml:PlaneAngleUom" use="required">
-<xsd:annotation>
 <xsd:documentation>The unit of measure of the azimuth value.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-86, Change=Changed-type-from:planeAngleUom</xsd:appinfo>
 </xsd:annotation>
 </xsd:attribute>
-<xsd:attribute name="northDirection" type="witsml:AziRef" use="optional">
-<xsd:annotation>
 <xsd:documentation>Specifies the direction to be considered North for the y axis.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="volumePerVolumeMeasurePercent" final="#all">
-<xsd:annotation>
 <xsd:documentation>A volume per volume measure that is constrained to a unit of percent.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
 <xsd:attribute name="uom" type="witsml:PercentUom" use="required"/>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:simpleType name="unitlessQuantity" final="#all">
-<xsd:annotation>
 <xsd:documentation>A unitless quantity. This should not be confused with a dimensionless measure.</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractDouble"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:complexType name="measureOrQuantity" final="#all">
-<xsd:annotation>
 <xsd:documentation>A measure with a uom or a quantity (without a uom). This should not be used except in situations where the underlying class of data is captured elsewhere. For example, via a measure class.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
-<xsd:attribute name="uom" type="witsml:uomString" use="optional">
-<xsd:annotation>
 <xsd:documentation>The unit of measure for the quantity. This value must conform to the values allowed by a measure class. If the value is a measure then the uom must be specified.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="genericMeasure" final="#all">
-<xsd:annotation>
 <xsd:documentation>A generic measure type. This should not be used except in situations where the underlying class of data is captured elsewhere. For example, for a log curve.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
-<xsd:attribute name="uom" type="witsml:uomString" use="required">
-<xsd:annotation>
 <xsd:documentation>The unit of measure for the quantity.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-85, Change=Made-mandatory</xsd:appinfo>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="ratioGenericMeasure" final="#all">
-<xsd:annotation>
 <xsd:documentation>Representation of a number as a double, possibly qualified as a ratio of doubles. Ratio component attributes 'numerator' and 'denominator' may be both present or both absent. When ratio component attributes are present, the ratio represented is to be used with the double representation included for human readability. A 'canonical' representation, according to the following rules, is suggested: Only use numerator/denominator when the representation of the number as double is not sufficiently precise (i. e. causes errors of accumulation). Express both numerator and denominator as integers (doubles with integer values) reduced to 'least common denominator' if possible.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
-<xsd:attribute name="uom" type="witsml:uomString" use="required">
-<xsd:annotation>
 <xsd:documentation>The unit of measure for the quantity. If for some reason a uom is not appropriate for the quantity, a unit of "Euc" should be used.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 <xsd:attribute name="numerator" type="witsml:unitlessQuantity" use="optional"/>
 <xsd:attribute name="denominator" type="witsml:unitlessQuantity" use="optional"/>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
<!--
 ===================== array types =====================
 -->
<!--
 -->
-<xsd:simpleType name="listOfString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A representation of a list of xsd:string values, restricted to strings without embedded whitespace.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Changed-type-from:str32</xsd:appinfo>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
 <xsd:list itemType="witsml:abstractString32"/>
 </xsd:simpleType>
<!--
 -->
<!--
 =========== uid and foreign key data types ============
 -->
<!--
 -->
-<xsd:simpleType name="uidString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A locally unique identifier. The value is not intended to convey any semantic content (e.g., it may be computer generated). </xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-5, Change=Modified-description</xsd:appinfo>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractUidString"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="uidParentString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A unique identifier of an object parent. This should only be used for the uid of a parent object (i.e., a foreign key to another object). It should not be used for child nodes of an object. The value is not intended to convey any semantic content (e.g., it may be computer generated). The purpose of this type is to facilitate modifying the optionality of parentage uids in derived schemas.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-5, Change=Added</xsd:appinfo>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractUidString"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="refString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A reference to the unique identifier of another element. This value represents a foreign key from one element to another. The value should match the value of an attribute of type uidString.</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractUidString"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:complexType name="refNameString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A reference to a name in another node of the xml hierachy. This value represents a foreign key from one element to another.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractNameString">
-<xsd:attribute name="uidRef" type="witsml:refString" use="optional">
-<xsd:annotation>
 <xsd:documentation>A reference to the unique identifier (uid attribute) in the node referenced by the name value. This attribute is required within the context of a WITSML server.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="refObjectString" final="#all">
-<xsd:annotation>
 <xsd:documentation>The value of a name element in another data-object. The information in this type represents a foreign key to a data-object instance. Knowledge of the type of object being referenced is defined by an attribute.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractNameString">
-<xsd:attribute name="object" type="witsml:nameString" use="required">
-<xsd:annotation>
 <xsd:documentation>The type of data-object being referenced (e.g., "well", "wellbore").</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
-<xsd:attribute name="uidRef" type="witsml:refString" use="optional">
-<xsd:annotation>
 <xsd:documentation>A reference to the unique identifier (uid attribute) in the object referenced by the name value. This attribute is required within the context of a WITSML server.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="refPositiveCount" final="#all">
-<xsd:annotation>
 <xsd:documentation>A reference to a index value in another node of the xml hierachy. This value represents a foreign key from one element to another.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractPositiveCount">
-<xsd:attribute name="uidRef" type="witsml:refString" use="optional">
-<xsd:annotation>
 <xsd:documentation>A reference to the unique identifier (uid attribute) in the node referenced by the index value. This attribute is required within the context of a WITSML server.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:simpleType name="refWellDatum" final="#all">
-<xsd:annotation>
 <xsd:documentation>A reference to a wellDatum in the current well. This value must match the uid value in a WellDatum. This value represents a foreign key from one element to another. This is an exception to the convention that a foreign key must utilize both a human contextual name and a uid value. For messages outside the context of a server then this value will commonly match the value of the name of the wellDatum (e.g., 'KB') if uids are not not used in that context. This was a compromise in order to allow the coordinate structures to be simple and still be usable both within the context of a server and outside the context of a server.</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractUidString"/>
 </xsd:simpleType>
<!--
 -->
<!--
 =========== CONTENT SPECIFIC STRING TYPES  ============
 -->
<!--
 -->
-<xsd:simpleType name="nameString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A user assigned human recognizable contextual name of something. There should be no assumption that (interoperable) semantic information will be extracted from the name by a third party. This type of value is generally not guaranteed to be unique and is not a candidate to be replaced by an enumeration.</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractNameString"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="commentString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A comment or remark intended for human consumption. There should be no assumption that semantics can be extracted from this field by a computer. Neither should there be an assumption that any two humans will interpret the information in the same way (i.e., it may not be interoperable).</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractCommentString"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="descriptionString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A textual description of something.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-33, Change=Changed-type-from:abstractString</xsd:appinfo>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractDescriptionString"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="shortDescriptionString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A short textual description of something.</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractString">
 <xsd:maxLength value="64"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:complexType name="timestampedCommentString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A timestamped textual description.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.1, By-issue=25, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractCommentString">
 <xsd:attribute name="dTim" type="witsml:timestamp" use="required"/>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:simpleType name="encodedValueString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A single value. The encoding may utilize any of several xsd encodings. Something external to the value must define the encoding.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Changed-type-from:abstractString</xsd:appinfo>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractString32"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:complexType name="extensionvalue" final="#all">
-<xsd:annotation>
 <xsd:documentation>A extension value. Each standard name should document the expected maximum size. Knowledge of the semantics must be provided with the context of the usage of this type.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-71 Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMaximumLengthString">
-<xsd:attribute name="uom" type="witsml:uomString" use="optional">
-<xsd:annotation>
 <xsd:documentation>The unit of measure for the value. This value must conform to the values allowed by a measure class.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:simpleType name="kindString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A community assigned human recognizable name. This type of value is intended to be unique and is generally a candidate to be constrained to an enumerated list.</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractTypeEnum"> </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="uomString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A unit of measure acronym from the POSC unit of measure file.</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractUomEnum"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="schemaVersionString" final="#all">
-<xsd:annotation>
 <xsd:documentation>The version of the schema. The first three levels are fixed. The fourth level can vary to represent on the constraints defined in enumerations and XML loader files. </xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.1, By-issue=none, Change=Modified-constraint</xsd:appinfo>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractString">
 <xsd:maxLength value="16"/>
 <xsd:pattern value="1\.4\.1\.([0-9]|([1-9][0-9]))"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:complexType name="nameStruct" final="#all">
-<xsd:annotation>
 <xsd:documentation>The name of something within a naming system.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractNameString">
-<xsd:attribute name="namingSystem" type="witsml:nameString" use="optional">
-<xsd:annotation>
 <xsd:documentation>The naming system within the name is (hopefully) unique.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="shortNameStruct" final="#all">
-<xsd:annotation>
 <xsd:documentation>The name of something within a naming system.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractString32">
-<xsd:attribute name="namingSystem" type="witsml:nameString" use="optional">
-<xsd:annotation>
 <xsd:documentation>The naming system within the name is (hopefully) unique.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="wellKnownNameStruct" final="#all">
-<xsd:annotation>
 <xsd:documentation>The name of something within a mandatory naming system with an optional code.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractNameString">
-<xsd:attribute name="namingSystem" type="witsml:nameString" use="required">
-<xsd:annotation>
 <xsd:documentation>The naming system within the name is unique.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
-<xsd:attribute name="code" type="witsml:kindString" use="optional">
-<xsd:annotation>
 <xsd:documentation>A unique (short) code associated with the name.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:simpleType name="uncollapsedString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A textual string that retains all whitespace.</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractUncollapsedString">
 <xsd:maxLength value="256"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="iadcBearingWearCode" final="#all">
-<xsd:annotation>
 <xsd:documentation>IADC bearing wear code: integer 0 - 8 or one of the letters E, F, N or X. .</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractString">
 <xsd:maxLength value="1"/>
 <xsd:pattern value="[0-8EFNX]"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="geodeticZoneString" final="#all">
-<xsd:annotation>
 <xsd:documentation>A geodetic zone with values from 1 to 60 and a required direction of "N" (North) or "S" (South). For example, "21N".</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractString">
 <xsd:maxLength value="3"/>
 <xsd:pattern value="([1-9]|[1-5][0-9]|60)[NS]"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:complexType name="objectSequence" final="#all">
-<xsd:annotation>
 <xsd:documentation>Defines a sequence number and with an optional description attribute.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.1, By-issue=W-CR-025, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractPositiveCount">
-<xsd:attribute name="description" type="witsml:descriptionString" use="optional">
-<xsd:annotation>
 <xsd:documentation>A description related to the sequence number.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="lithostratigraphyStruct" final="#all">
-<xsd:annotation>
 <xsd:documentation> The name of a lithostratigraphy, with the "kind" attribute specifying the lithostratigraphic unit-hierarchy (Group, Formation, Member or Bed). The entry at each level is free text for the local lithostratigraphy at that level in the hierarchy. If a single hierarchy is defined, it is assumed this is at the Formation level in the hierarchy and kind=formation should be used for the entry. </xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.1, By-issue=W-CR-043, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractNameString">
-<xsd:attribute name="kind" type="witsml:LithostratigraphyUnit" use="optional">
-<xsd:annotation>
 <xsd:documentation>The unit of lithostratigraphy.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="chronostratigraphyStruct" final="#all">
-<xsd:annotation>
 <xsd:documentation>The name of a chronostratigraphy, with the "kind" attribute specifying the chronostratigraphic unit-hierarchy (Era, Period, Epoch, Stage).</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.1, By-issue=W-CR-043, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractNameString">
-<xsd:attribute name="kind" type="witsml:ChronostratigraphyUnit" use="optional">
-<xsd:annotation>
 <xsd:documentation>The unit of chronostratigraphy.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
<!--
 =========== Well Based Coordinate Types  ==============
 -->
<!--
 -->
-<xsd:complexType name="measuredDepthCoord" final="#all">
-<xsd:annotation>
 <xsd:documentation>A measured depth coordinate in a wellbore. Positive moving from the reference datum toward the bottomhole. All coordinates with the same datum (and same uom) can be considered to be in the same Coordinate Reference System and are thus directly comparable.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
-<xsd:attribute name="uom" type="witsml:MeasuredDepthUom" use="required">
-<xsd:annotation>
 <xsd:documentation>The unit of measure of the quantity value.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
-<xsd:attribute name="datum" type="witsml:refWellDatum" use="optional">
-<xsd:annotation>
 <xsd:documentation>A pointer to the reference datum for this coordinate value as defined in WellDatum. This value is assumed to match the uid value in a WellDatum. If not given then the default WellDatum must be assumed.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="wellVerticalDepthCoord" final="#all">
-<xsd:annotation>
 <xsd:documentation>A vertical (gravity based) depth coordinate within the context of a well. Positive moving downward from the reference datum. All coordinates with the same datum (and same uom) can be considered to be in the same Coordinate Reference System and are thus directly comparable.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
-<xsd:attribute name="uom" type="witsml:WellVerticalCoordinateUom" use="required">
-<xsd:annotation>
 <xsd:documentation>The unit of measure of the quantity value.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
-<xsd:attribute name="datum" type="witsml:refWellDatum" use="optional">
-<xsd:annotation>
 <xsd:documentation>A pointer to the reference datum for this coordinate value as defined in WellDatum. If not given then the default WellDatum must be assumed.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="wellElevationCoord" final="#all">
-<xsd:annotation>
 <xsd:documentation>A vertical (gravity based) elevation coordinate within the context of a well. Positive moving upward from the reference datum. All coordinates with the same datum (and same uom) can be considered to be in the same Coordinate Reference System and are thus directly comparable.</xsd:documentation>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
-<xsd:attribute name="uom" type="witsml:WellVerticalCoordinateUom" use="required">
-<xsd:annotation>
 <xsd:documentation>The unit of measure of the quantity value. If not given then the default unit of measure of the explicitly or implicitly given datum must be assumed.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
-<xsd:attribute name="datum" type="witsml:refWellDatum" use="optional">
-<xsd:annotation>
 <xsd:documentation>A pointer to the reference datum for this coordinate value as defined in WellDatum. If not given then the default WellDatum must be assumed.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
<!--
 =========== USA based Coordinate Types  ===============
 -->
<!--
 -->
-<xsd:simpleType name="sectionNumber" final="#all">
-<xsd:annotation>
 <xsd:documentation>Sections are numbered "1" through "36." Irregular sections may be designated with a single value after a decimal point. USA Public Land Survey System.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-15, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractString">
 <xsd:pattern value="[+]?([1-9]|[1-2][0-9]|3[0-6])\.?[0-9]?"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="publicLandSurveySystemQuarterTownship" final="#all">
-<xsd:annotation>
 <xsd:documentation>Designates a particular quarter of a township. USA Public Land Survey System.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-15, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractString">
 <xsd:maxLength value="12"/>
 <xsd:pattern value="NE|NW|SW|SE"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="publicLandSurveySystemQuarterSection" final="#all">
-<xsd:annotation>
 <xsd:documentation>Some combination of NE,NW,SW,SE,N2,S2,E2,W2,C,TRxx,LTnn. USA Public Land Survey System.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-15, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractString">
 <xsd:maxLength value="12"/>
 <xsd:pattern value="(NE|NW|SW|SE|N2|S2|E2|W2|C|LT[0-9]{2,2}|TR[a-zA-Z0-9]{1,2}){1,3}"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:complexType name="footageNorthSouth" final="#all">
-<xsd:annotation>
 <xsd:documentation>The distance to a one minute boundary on the north or south of a point. USA Public Land Survey System.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-15, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
-<xsd:attribute name="uom" type="witsml:LengthUom" use="required">
-<xsd:annotation>
 <xsd:documentation>The unit of measure of the distance value.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-86, Change=Changed-type-from:lengthUom</xsd:appinfo>
 </xsd:annotation>
 </xsd:attribute>
-<xsd:attribute name="ref" type="witsml:NorthOrSouth" use="required">
-<xsd:annotation>
 <xsd:documentation>Specifies the reference line that is the origin of the distance.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="footageEastWest" final="#all">
-<xsd:annotation>
 <xsd:documentation>The distance to a one minute boundary on the east or west of a point. USA Public Land Survey System.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-15, Change=Added</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractMeasure">
-<xsd:attribute name="uom" type="witsml:LengthUom" use="required">
-<xsd:annotation>
 <xsd:documentation>The unit of measure of the distance value.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-86, Change=Changed-type-from:lengthUom</xsd:appinfo>
 </xsd:annotation>
 </xsd:attribute>
-<xsd:attribute name="ref" type="witsml:EastOrWest" use="required">
-<xsd:annotation>
 <xsd:documentation>Specifies the reference line that is the origin of the distance.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
<!--
 ========== CONTENT SPECIFIC INTEGER TYPES  ============
 -->
<!--
 -->
-<xsd:simpleType name="gtZeroAndLeOne" final="#all">
-<xsd:annotation>
 <xsd:documentation>A floating point value which is greater than zero and less than or equal to one.</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractDouble">
 <xsd:minExclusive value="0"/>
 <xsd:maxInclusive value="1"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="nonNegativeCount" final="#all">
-<xsd:annotation>
 <xsd:documentation>A non-negative integer (zero based count or index) with a maximum value of 32767 (2-bytes). For items that represent "number of" something or a "sequential" count or index.</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractShort">
-<xsd:minInclusive value="0">
-<xsd:annotation>
 <xsd:documentation>This value can be zero but cannot be negative.</xsd:documentation>
 </xsd:annotation>
 </xsd:minInclusive>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="positiveCount" final="#all">
-<xsd:annotation>
 <xsd:documentation>A positive integer (one based count or index).</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractPositiveCount">
-<xsd:minInclusive value="1">
-<xsd:annotation>
 <xsd:documentation>This value cannot be negative or zero.</xsd:documentation>
 </xsd:annotation>
 </xsd:minInclusive>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="positiveBigCount" final="#all">
-<xsd:annotation>
 <xsd:documentation>A large positive integer (one based count or index) with a maximum value of 2,147,483,647 (4-bytes).</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractInt">
-<xsd:minInclusive value="1">
-<xsd:annotation>
 <xsd:documentation>This value cannot be negative or zero.</xsd:documentation>
 </xsd:annotation>
 </xsd:minInclusive>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="integerCount" final="#all">
-<xsd:annotation>
 <xsd:documentation>A positive or negative count with a maximum positive value of 2147483647 (4-bytes).</xsd:documentation>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractInt"/>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="beaufortScaleIntegerCode" final="#all">
-<xsd:annotation>
 <xsd:documentation>An estimate wind strength based on the Beaufort Wind Scale. Values range from 0 (calm) to 12 (hurricane). </xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractShort">
 <xsd:minInclusive value="0"/>
 <xsd:maxInclusive value="12"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="pumpActionIntegerCode" final="#all">
-<xsd:annotation>
 <xsd:documentation>Pump Action: 1 = Single acting, 2 = double acting.</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractShort">
 <xsd:minInclusive value="1"/>
 <xsd:maxInclusive value="2"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="iadcIntegerCode" final="#all">
-<xsd:annotation>
 <xsd:documentation>IADC codes: 0 to 8.</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractShort">
 <xsd:minInclusive value="0"/>
 <xsd:maxInclusive value="8"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="levelIntegerCode" final="#all">
-<xsd:annotation>
 <xsd:documentation>Integer level code from 1 through 5.</xsd:documentation>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractShort">
 <xsd:minInclusive value="0"/>
 <xsd:maxInclusive value="8"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
<!--
 ========== REMAINING V1.2 TYPES  ============
 -->
<!--
 -->
-<xsd:complexType name="cost" final="#all">
-<xsd:annotation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractDouble">
 <xsd:attribute name="currency" type="witsml:kindString" use="optional"/>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:complexType name="indexedObject" final="#all">
-<xsd:annotation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
-<xsd:simpleContent>
-<xsd:extension base="witsml:abstractTypeEnum">
-<xsd:attribute name="index" type="witsml:positiveCount" use="required">
-<xsd:annotation>
 <xsd:documentation>Indexes things with the same name. That is the first one, the second one, etc.</xsd:documentation>
 </xsd:annotation>
 </xsd:attribute>
 <xsd:attribute name="name" type="witsml:kindString" use="optional"/>
 <xsd:attribute name="uom" type="witsml:uomString" use="optional"/>
 <xsd:attribute name="description" type="witsml:descriptionString" use="optional"/>
-<xsd:attributeGroup ref="witsml:attgrp_uid">
-<xsd:annotation>
 <xsd:documentation>Unique identifier for the node.</xsd:documentation>
 <xsd:appinfo>Modified-in-version=1.4.1, By-issue=21, Change=Added</xsd:appinfo>
 </xsd:annotation>
 </xsd:attributeGroup>
 </xsd:extension>
 </xsd:simpleContent>
 </xsd:complexType>
<!--
 -->
-<xsd:simpleType name="str2" final="#all">
-<xsd:annotation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractString">
 <xsd:maxLength value="2"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="str16" final="#all">
-<xsd:annotation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
-<xsd:restriction base="witsml:abstractString">
 <xsd:maxLength value="16"/>
 </xsd:restriction>
 </xsd:simpleType>
<!--
 -->
-<xsd:simpleType name="str32" final="#all">
-<xsd:annotation>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3-44, Change=Changed-type-from:abstractString</xsd:appinfo>
 <xsd:appinfo>Modified-in-version=1.4.0, By-issue=1.3.1-110, Change=Non-semantic</xsd:appinfo>
 </xsd:annotation>
 <xsd:restriction base="witsml:abstractString32"/>
 </xsd:simpleType>
<!--
 -->
 </xsd:schema>