-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.witsml.org/schemas/131" version="1.0">
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 <xsd:include schemaLocation="typ_dataTypes.xsd"/>
 <xsd:include schemaLocation="attgrp_uid.xsd"/>
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-<xsd:complexType name="cs_identifierStruct">
-<xsd:annotation>
 <xsd:documentation>A common way for handling names of objects. An identifier type must include a Name. It may also include a NamingSystem, which gives meaning to the name. Since Names and NamingSystems may change with time, it may also include a Version, to further refine the meaning of the name. Note that this three-part structure is based on the ISO Identifier type.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="name" type="witsml:nameString" minOccurs="1" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The name of the object being identified. It may or may not be a unique name, depending on the use of this type. When used as an "identifier," it should be a unique name, within the naming system. When used as an "alias," the name is not required to be unique.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="namingSystem" type="witsml:nameString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The naming system under which the name is defined. For example, if the name is a person's social security number, the naming system would be SSN, or some equivalent code which represents that the name is a social security number. Since naming system may be a code, there are two attributes (nameRef and systemList), which may be used to lead an application to a registry, where meaning can be obtained for the code.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="comment" type="witsml:commentString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>A comment about the identifier.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
-<xsd:attributeGroup ref="witsml:attgrp_uid">
-<xsd:annotation>
 <xsd:documentation>The unique identifier of the recurring node.</xsd:documentation>
 </xsd:annotation>
 </xsd:attributeGroup>
 </xsd:complexType>
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 </xsd:schema>