<xs:schema targetNamespace="http://ltsc.ieee.org/xsd/LOM/unique"
           xmlns="http://ltsc.ieee.org/xsd/LOM/unique"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           elementFormDefault="qualified"
           version="IEEE LTSC LOM XML 1.0">

  <xs:annotation>
    <xs:documentation>
       This work is licensed under the Creative Commons Attribution-ShareAlike
       License.  To view a copy of this license, see the file license.txt,
       visit http://creativecommons.org/licenses/by-sa/2.0 or send a letter to
       Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
    </xs:documentation>

    <xs:documentation>
       This component schema definition provides attribute group declarations for 
       LOM data elements to support schema-based validation of uniqueness constraints
       within a LOM XML instance where the exact set of attributes associated with each
       element has to be as specified by the LOM XML Schema binding (i.e., where extra
       attributes to enforce uniqueness have to be avoided).

       Duplicate declarations are included as comments for completeness.  These 
       declarations should remain commented out or they can be removed completely.

       NOTE: The absence of the enforcement of the uniqueness constraints does not 
       relieve a particular LOM XML instance from satisfying the uniqueness constraints 
       described in the LOMv1.0 base schema. Applications that require the use of 
       the unique/loose.xsd component XSD have to enforce those uniqueness constraints 
       by other means.
    </xs:documentation> 
  </xs:annotation>

  <!-- Attribute group declarations -->

  <!-- Duplicate declarations are included as comments. -->

  <!-- Learning Object Metadata -->
  <xs:attributeGroup name="lom"/>

  <!-- DateTime -->
  <xs:attributeGroup name="DateTimeValue"/>

  <!-- Duration -->
  <xs:attributeGroup name="DurationValue"/>

  <!-- Source -->
  <xs:attributeGroup name="source"/>

  <!-- Value -->
  <xs:attributeGroup name="value"/>

  <!-- 1 General -->
  <xs:attributeGroup name="general"/>

  <!-- 1.1 Identifier -->
  <xs:attributeGroup name="identifier"/>

  <!-- 1.1.1 Catalog -->
  <xs:attributeGroup name="catalog"/>

  <!-- 1.1.2 Entry -->
  <xs:attributeGroup name="entry"/>

  <!-- 1.2 Title -->
  <xs:attributeGroup name="title"/>

  <!-- 1.3 Language -->
  <xs:attributeGroup name="language"/>

  <!-- 1.4 Description -->
  <xs:attributeGroup name="description"/>

  <!-- 1.5 Keyword -->
  <xs:attributeGroup name="keyword"/>

  <!-- 1.6 Coverage -->
  <xs:attributeGroup name="coverage"/>

  <!-- 1.7 Structure -->
  <xs:attributeGroup name="structure"/>

  <!-- 1.8 Aggregation Level -->
  <xs:attributeGroup name="aggregationLevel"/>

  <!-- 2 Life Cycle -->
  <xs:attributeGroup name="lifeCycle"/>

  <!-- 2.1 Version -->
  <xs:attributeGroup name="version"/>

  <!-- 2.2 Status -->
  <xs:attributeGroup name="status"/>

  <!-- 2.3 Contribute -->
  <xs:attributeGroup name="contribute"/>

  <!-- 2.3.1 Role -->
  <xs:attributeGroup name="role"/>

  <!-- 2.3.2 Entity -->
  <xs:attributeGroup name="entity"/>

  <!-- 2.3.3 Date -->
  <xs:attributeGroup name="date"/>

  <!-- 3 Meta-Metadata -->
  <xs:attributeGroup name="metaMetadata"/>

  <!-- 3.1 Identifier
  <xs:attributeGroup name="identifier"/> -->

  <!-- 3.1.1 Catalog
  <xs:attributeGroup name="catalog"/> -->

  <!-- 3.1.2 Entry
  <xs:attributeGroup name="entry"/> -->

  <!-- 3.2 Contribute
  <xs:attributeGroup name="contribute"/> -->

  <!-- 3.2.1 Role
  <xs:attributeGroup name="role"/> -->

  <!-- 3.2.2 Entity
  <xs:attributeGroup name="entity"/> -->

  <!-- 3.2.3 Date
  <xs:attributeGroup name="date"/> -->

  <!-- 3.3 Metadata Schema -->
  <xs:attributeGroup name="metadataSchema"/>

  <!-- 3.4 Language
  <xs:attributeGroup name="language"/> -->

  <!-- 4 Technical -->
  <xs:attributeGroup name="technical"/>

  <!-- 4.1 Format -->
  <xs:attributeGroup name="format"/>

  <!-- 4.2 Size -->
  <xs:attributeGroup name="size"/>

  <!-- 4.3 Location -->
  <xs:attributeGroup name="location"/>

  <!-- 4.4 Requirement -->
  <xs:attributeGroup name="requirement"/>

  <!-- 4.4.1 OrComposite -->
  <xs:attributeGroup name="orComposite"/>

  <!-- 4.4.1.1 Type -->
  <xs:attributeGroup name="type"/>

  <!-- 4.4.1.2 Name -->
  <xs:attributeGroup name="name"/>

  <!-- 4.4.1.3 Minimum Version -->
  <xs:attributeGroup name="minimumVersion"/>

  <!-- 4.4.1.4 Maximum Version -->
  <xs:attributeGroup name="maximumVersion"/>

  <!-- 4.5 Installation Remarks -->
  <xs:attributeGroup name="installationRemarks"/>

  <!-- 4.6 Other Platform Requirements -->
  <xs:attributeGroup name="otherPlatformRequirements"/>

  <!-- 4.7 Duration -->
  <xs:attributeGroup name="duration"/>

  <!-- 5 Educational -->
  <xs:attributeGroup name="educational"/>

  <!-- 5.1 Interactivity Type -->
  <xs:attributeGroup name="interactivityType"/>

  <!-- 5.2 Learning Resource Type -->
  <xs:attributeGroup name="learningResourceType"/>

  <!-- 5.3 Interactivity Level -->
  <xs:attributeGroup name="interactivityLevel"/>

  <!-- 5.4 Semantic Density -->
  <xs:attributeGroup name="semanticDensity"/>

  <!-- 5.5 Intended End User Role -->
  <xs:attributeGroup name="intendedEndUserRole"/>

  <!-- 5.6 Context -->
  <xs:attributeGroup name="context"/>

  <!-- 5.7 Typical Age Range -->
  <xs:attributeGroup name="typicalAgeRange"/>

  <!-- 5.8 Difficulty -->
  <xs:attributeGroup name="difficulty"/>

  <!-- 5.9 Typical Learning Time -->
  <xs:attributeGroup name="typicalLearningTime"/>

  <!-- 5.10 Description
  <xs:attributeGroup name="description"/> -->

  <!-- 5.11 Language
  <xs:attributeGroup name="language"/> -->

  <!-- 6 Rights -->
  <xs:attributeGroup name="rights"/>

  <!-- 6.1 Cost -->
  <xs:attributeGroup name="cost"/>

  <!-- 6.2 Copyright and Other Restrictions -->
  <xs:attributeGroup name="copyrightAndOtherRestrictions"/>

  <!-- 6.3 Description
  <xs:attributeGroup name="description"/> -->

  <!-- 7 Relation -->
  <xs:attributeGroup name="relation"/>

  <!-- 7.1 Kind -->
  <xs:attributeGroup name="kind"/>

  <!-- 7.2 Resource -->
  <xs:attributeGroup name="resource"/>

  <!-- 7.2.1 Identifier
  <xs:attributeGroup name="identifier"/> -->

  <!-- 7.2.1.1 Catalog
  <xs:attributeGroup name="catalog"/> -->

  <!-- 7.2.1.2 Entry
  <xs:attributeGroup name="entry"/> -->

  <!-- 7.2.2 Description
  <xs:attributeGroup name="description"/> -->

  <!-- 8 Annotation -->
  <xs:attributeGroup name="annotation"/>

  <!-- 8.1 Entity
  <xs:attributeGroup name="entity"/> -->

  <!-- 8.2 Date
  <xs:attributeGroup name="date"/> -->

  <!-- 8.3 Description
  <xs:attributeGroup name="description"/> -->

  <!-- 9 Classification -->
  <xs:attributeGroup name="classification"/>

  <!-- 9.1 Purpose -->
  <xs:attributeGroup name="purpose"/>

  <!-- 9.2 Taxon Path -->
  <xs:attributeGroup name="taxonPath"/>

  <!-- 9.2.1 Source
  <xs:attributeGroup name="source"/> -->

  <!-- 9.2.2 Taxon -->
  <xs:attributeGroup name="taxon"/>

  <!-- 9.2.2.1 Id -->
  <xs:attributeGroup name="id"/>

  <!-- 9.2.2.2 Entry
  <xs:attributeGroup name="entry"/> -->

  <!-- 9.3 Description
  <xs:attributeGroup name="description"/> -->

  <!-- 9.4 Keyword
  <xs:attributeGroup name="keyword"/> -->

</xs:schema>