<xs:schema targetNamespace="http://ltsc.ieee.org/xsd/LOM"
           xmlns="http://ltsc.ieee.org/xsd/LOM"
           xmlns:ag="http://ltsc.ieee.org/xsd/LOM/unique"
           xmlns:ex="http://ltsc.ieee.org/xsd/LOM/extend"
           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 defintion defines global schema data type declarations
         for data types defined in the LOMv1.0 base schema.
      </xs:documentation>
      <xs:documentation>
        *****************************************************************************
        **                                                                         ** 
        ** NOTE THIS CHANGE HISTORY IS USED TO DOCUMENT CHANGES TO THE XML SCHEMA  **
        ** DEFINITION DURING THE BALLOTING PROCESS.  THIS CHANGE HISTORY WILL BE   **
        ** REMOVED ONCE THE FINAL VERSION OF THE STANDARD IS PUBLISHED.  A NEW     **
        ** CHANGE HISTORY WILL BE INCLUDED TO INDICATE THE INITIAL RELEASE THAT    **
        ** MAPS TO THE FINAL STANDARD.                                             **
        **                                                                         **
        *****************************************************************************
        **                            CHANGE HISTORY                               **
        *****************************************************************************
        ** 11/14/2003:  1)Updated xs:pattern for the DurationString.  The pattern  **
        **                did not permit zero values for each of the date and      **
        **                time components.                                         **
        **                                                                         **
        ** 03/15/2004:  1)Changed the restriction type for LanguageIdNone from     **
        **                xs:string to xs:token                                    **
        **                                                                         ** 
        ** 08/24/2004:  1) To correct a XML Binding to Marshalling issue, a change **
        **              is needed to resolve a naming convention for two complex   **
        **              types:                                                     **       
        **                1.1) Changed the name of the LangString complexType      **
        **                to LanguageString                                        **
        **                1.2) Change the  name of the langString completType to   **
        **                LangString                                               **
        **              2)Updated the Creative Commons Licensing agreement to      **
        **                reference the Attribution-ShareAlike 2.0                 **
        **                                                                         ** 
        ** 09/27/2004   1)Updated file documentation to correspond with working    **
        **                draft 3.                                                 **
        **              2)Removed the LanguageIdOrNone and LanguageIdNone type     **
        **                declarations.  The types were not needed.  The           **
        **                LanguageId type was updated to support attribute         **
        **                extensions.  The LanguageId will now vaidate any         **
        **                language defined by 1484.12.3 and the token "none".      **
        **              3)Updated VCard to support attribute extensions.           **
        **              4)Updated LanguageString to reference the xs:language      **
        **                data type.                                               **       
        **              5)Updated DateTimeValue to support attribute extensions.   **
        **              6)Updated DurationValue to support attribute extensions.   **
        *****************************************************************************

	24 May 2007 	NOTE: The Size and Duration types have been renamed SizeBase 
			and DurationBase to prevent errors with web services 
			development tools. This change does not affect the resulting 
			XML document. The change applies only to MedBiquitous 
			Healthcare LOM schema files.

      </xs:documentation>
   </xs:annotation>

   <xs:import namespace = "http://ltsc.ieee.org/xsd/LOM/unique" schemaLocation = "../unique/strict.xsd"/>
   <xs:import namespace = "http://ltsc.ieee.org/xsd/LOM/extend" schemaLocation = "../extend/custom.xsd"/>

   <!-- Data type declarations -->

   <!-- CharacterString -->
   <xs:simpleType name="CharacterString">
      <xs:restriction base="xs:string"/>
   </xs:simpleType>

   <!-- LanguageId -->
   <xs:complexType name="LanguageId">
       <xs:simpleContent>
         <xs:extension base="xs:language">
            <xs:attributeGroup ref="ex:customAttributes"/>
         </xs:extension>
      </xs:simpleContent>
   </xs:complexType>

   <!-- VCard -->
   <xs:complexType name="VCard">
       <xs:simpleContent>
         <xs:extension base="CharacterString">
            <xs:attributeGroup ref="ex:customAttributes"/>
         </xs:extension>
      </xs:simpleContent>
   </xs:complexType>

   <!-- MimeType -->
   <xs:simpleType name="MimeType">
      <xs:restriction base="CharacterString"/>
   </xs:simpleType>

   <!-- Size -->
   <xs:simpleType name="SizeBase">
      <xs:restriction base="xs:nonNegativeInteger"/>
   </xs:simpleType>

   <!-- LanguageString -->
   <xs:complexType name="LanguageString">
      <xs:choice minOccurs="0" maxOccurs="unbounded">
         <xs:element name="string" type="LangString"/>
         <xs:group ref="ex:customElements"/>
      </xs:choice>
      <xs:attributeGroup ref="ex:customAttributes"/>
   </xs:complexType>

   <xs:complexType name="LangString">
      <xs:simpleContent>
         <xs:extension base="CharacterString">
            <xs:attribute name="language" type="xs:language"/>
            <xs:attributeGroup ref="ex:customAttributes"/>
         </xs:extension>
      </xs:simpleContent>
   </xs:complexType>

   <!-- DateTime -->
   <xs:complexType name="DateTime">
      <xs:choice minOccurs="0" maxOccurs="unbounded">
         <xs:element name="dateTime" type="DateTimeValue"/>
         <xs:element name="description" type="description"/>
         <xs:group ref="ex:customElements"/>
      </xs:choice>
   </xs:complexType>

   <xs:complexType name="DateTimeValue">
      <xs:simpleContent>
         <xs:extension base="DateTimeString">
           <xs:attributeGroup ref="ag:DateTimeValue"/>
           <xs:attributeGroup ref="ex:customAttributes"/>
         </xs:extension>
      </xs:simpleContent>
   </xs:complexType>

   <!-- Regular expresion from Christian Klaue -->
   <xs:simpleType name="DateTimeString">
      <xs:restriction base="CharacterString">
         <xs:pattern value="([0-9]{3}[1-9]|[0-9]{2}[1-9][0-9]|[0-9][1-9][0-9]{2}|[1-9][0-9]{3})(\-(0[1-9]|1[0-2])(\-(0[1-9]|[1-2][0-9]|3[0-1])(T([0-1][0-9]|2[0-3])(:[0-5][0-9](:[0-5][0-9](\.[0-9]{1,}(Z|((\+|\-)([0-1][0-9]|2[0-3]):[0-5][0-9]))?)?)?)?)?)?)?"/>
      </xs:restriction>
   </xs:simpleType>

   <!-- Duration -->
   <xs:complexType name="DurationBase">
      <xs:choice minOccurs="0" maxOccurs="unbounded">
         <xs:element name="duration" type="DurationValue"/>
         <xs:element name="description" type="description"/>
         <xs:group ref="ex:customElements"/>
      </xs:choice>
   </xs:complexType>

   <xs:complexType name="DurationValue">
      <xs:simpleContent>
         <xs:extension base="DurationString">
            <xs:attributeGroup ref="ag:DurationValue"/>
            <xs:attributeGroup ref="ex:customAttributes"/>
         </xs:extension>
      </xs:simpleContent>
   </xs:complexType>

   <!-- Regular expresion from Christian Klaue -->
   <xs:simpleType name="DurationString">
      <xs:restriction base="CharacterString">
         <xs:pattern value="P([0-9]{1,}Y){0,1}([0-9]{1,}M){0,1}([0-9]{1,}D){0,1}(T([0-9]{1,}H){0,1}([0-9]{1,}M){0,1}([0-9]{1,}(\.[0-9]{1,}){0,1}S){0,1}){0,1}"/>
      </xs:restriction>
   </xs:simpleType>

</xs:schema>