-<xs:schema targetNamespace="http://www.energistics.org/energyml/data/commonv2" elementFormDefault="qualified" version="2.1">
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-<xs:annotation>
 <xs:documentation>This package contains the types and elements to allow an EnergyML Data Object to refer to another EnergyML Data Object (i.e. External References).</xs:documentation>
 </xs:annotation>
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 <xs:import namespace="http://www.opengis.net/gml/3.2" schemaLocation="../../../common/v2.1/xsd_schemas/gml/3.2.1/gml.xsd"/>
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 <xs:include schemaLocation="BaseTypes.xsd"/>
 <xs:include schemaLocation="Abstract.xsd"/>
-<xs:complexType name="DataObjectReference">
-<xs:annotation>
 <xs:documentation>It only applies for Energistics data object.</xs:documentation>
 </xs:annotation>
-<xs:sequence>
-<xs:element name="ContentType" type="eml:String2000" minOccurs="1" maxOccurs="1">
-<xs:annotation>
 <xs:documentation>The content type of the referenced element.</xs:documentation>
 </xs:annotation>
 </xs:element>
-<xs:element name="Title" type="eml:String2000" minOccurs="1" maxOccurs="1">
-<xs:annotation>
 <xs:documentation>The Title of the referenced object. The Title of a top level element would be inherited from AbstractObject and must be present on any referenced object. </xs:documentation>
 </xs:annotation>
 </xs:element>
-<xs:element name="Uuid" type="eml:UuidString" minOccurs="1" maxOccurs="1">
-<xs:annotation>
 <xs:documentation>Reference to an object using its global UID.</xs:documentation>
 </xs:annotation>
 </xs:element>
-<xs:element name="UuidAuthority" type="eml:String64" minOccurs="0" maxOccurs="1">
-<xs:annotation>
 <xs:documentation>The authority that issued and maintains the uuid of the referenced object. Used mainly in alias context.</xs:documentation>
 </xs:annotation>
 </xs:element>
-<xs:element name="Uri" type="xs:anyURI" minOccurs="0" maxOccurs="1">
-<xs:annotation>
 <xs:documentation>This is the URI of a referenced object. Do not use this to store the path and file names of an external object - that is done through the External Dataset machinery. This element is intended for use with the Energistics Transfer Protocol.</xs:documentation>
 </xs:annotation>
 </xs:element>
-<xs:element name="VersionString" type="eml:String64" minOccurs="0" maxOccurs="1">
-<xs:annotation>
 <xs:documentation>Indicates the version of the object which is referenced.</xs:documentation>
 </xs:annotation>
 </xs:element>
 </xs:sequence>
 </xs:complexType>
 <xs:element name="EpcExternalPartReference" type="eml:EpcExternalPartReference" substitutionGroup="eml:AbstractDataObject"/>
-<xs:complexType name="EpcExternalPartReference">
-<xs:annotation>
 <xs:documentation>It defines a proxy for external part of the EPC package. It must be used at least for external HDF parts. Each EpcExternalPartReference represents a single operating system file</xs:documentation>
 </xs:annotation>
-<xs:complexContent>
-<xs:extension base="eml:AbstractObject">
-<xs:sequence>
 <xs:element name="Filename" type="eml:String2000" minOccurs="0" maxOccurs="1"/>
-<xs:element name="MimeType" type="eml:String2000" minOccurs="0" maxOccurs="1">
-<xs:annotation>
 <xs:documentation>IAMF registered, if one exists, or a free text field. Needs documentation on seismic especially. MIME type for HDF proxy is : application/x-hdf5 (by convention). </xs:documentation>
 </xs:annotation>
 </xs:element>
 </xs:sequence>
 </xs:extension>
 </xs:complexContent>
 </xs:complexType>
-<xs:complexType name="ExternalDataset">
-<xs:sequence>
 <xs:element name="ExternalFileProxy" type="eml:ExternalDatasetPart" minOccurs="1" maxOccurs="unbounded"/>
 </xs:sequence>
 </xs:complexType>
-<xs:complexType name="ExternalDatasetPart">
-<xs:sequence>
 <xs:element name="Count" type="eml:PositiveLong" minOccurs="1" maxOccurs="1"/>
-<xs:element name="PathInExternalFile" type="eml:String2000" minOccurs="1" maxOccurs="1">
-<xs:annotation>
 <xs:documentation>A string which is meaningful to the API which will store and retrieve data from the external file. For an HDF file this is the path of the referenced dataset in the external file. The separator between groups and final dataset is a slash '/' in an hdf file. For a LAS file this could be the list of mnemonics in the ~A block. For a SEG-Y file this could be a list of trace headers.</xs:documentation>
 </xs:annotation>
 </xs:element>
 <xs:element name="StartIndex" type="eml:NonNegativeLong" minOccurs="1" maxOccurs="1"/>
 <xs:element name="EpcExternalPartReference" type="eml:DataObjectReference" minOccurs="1" maxOccurs="1"/>
 </xs:sequence>
 </xs:complexType>
 </xs:schema>