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      <FormatID>693</FormatID>
      <FormatName>Windows Media Video</FormatName>
      <FormatVersion>
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      <FormatAliases>WMV</FormatAliases>
      <FormatFamilies>
      </FormatFamilies>
      <FormatTypes>Video</FormatTypes>
      <FormatDisclosure>Full</FormatDisclosure>
      <FormatDescription>Windows Media Video Format is a subtype of the Advanced Systems Format, developed by Microsoft for storing video data streams. It comprises a Header Object, which describes the properties of the data streams, a Data Object, which contains the actual data streams stored in Data Packets and, optionally, one or more Index Objects. Video data is stored using the Windows Media Video codec, and the format supports streaming across networks.</FormatDescription>
      <BinaryFileFormat>Binary</BinaryFileFormat>
      <ByteOrders>Little-endian (Intel)</ByteOrders>
      <ReleaseDate>01 Dec 2004</ReleaseDate>
      <WithdrawnDate>
      </WithdrawnDate>
      <ProvenanceSourceID>1</ProvenanceSourceID>
      <ProvenanceName>Digital Preservation Department / The National Archives</ProvenanceName>
      <ProvenanceSourceDate>11 Mar 2005</ProvenanceSourceDate>
      <ProvenanceDescription>
      </ProvenanceDescription>
      <LastUpdatedDate>02 Aug 2005</LastUpdatedDate>
      <FormatNote>
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      <FormatRisk>
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      <TechnicalEnvironment>
      </TechnicalEnvironment>
      <FileFormatIdentifier>
        <Identifier>com.microsoft.windows-media-wmv</Identifier>
        <IdentifierType>Apple Uniform Type Identifier</IdentifierType>
      </FileFormatIdentifier>
      <FileFormatIdentifier>
        <Identifier>fmt/133</Identifier>
        <IdentifierType>PUID</IdentifierType>
      </FileFormatIdentifier>
      <FileFormatIdentifier>
        <Identifier>video/x-ms-wmv</Identifier>
        <IdentifierType>MIME</IdentifierType>
      </FileFormatIdentifier>
      <Document>
        <DocumentID>3</DocumentID>
        <DisplayText>Microsoft Corporation, 2004, Advanced Systems Format (ASF) Specification: Revision 01.20.03</DisplayText>
        <DocumentType>Authoritative</DocumentType>
        <AvailabilityDescription>Public</AvailabilityDescription>
        <AvailabilityNote>
        </AvailabilityNote>
        <PublicationDate>01 Dec 2004</PublicationDate>
        <TitleText>Advanced Systems Format (ASF) Specification: Revision 01.20.03</TitleText>
        <DocumentIPR>
        </DocumentIPR>
        <DocumentNote>
        </DocumentNote>
        <DocumentIdentifier>
          <Identifier>www.microsoft.com/windows/windowsmedia/format/asfspec.aspx</Identifier>
          <IdentifierType>URL</IdentifierType>
        </DocumentIdentifier>
        <Author>
          <AuthorID>93</AuthorID>
          <AuthorName>
          </AuthorName>
          <OrganisationName>Microsoft Corporation</OrganisationName>
          <AuthorCompoundName>Microsoft Corporation</AuthorCompoundName>
        </Author>
        <Publisher>
          <PublisherID>93</PublisherID>
          <PublisherName>
          </PublisherName>
          <OrganisationName>Microsoft Corporation</OrganisationName>
          <PublisherCompoundName>Microsoft Corporation</PublisherCompoundName>
        </Publisher>
      </Document>
      <ExternalSignature>
        <ExternalSignatureID>562</ExternalSignatureID>
        <Signature>asf</Signature>
        <SignatureType>File extension</SignatureType>
      </ExternalSignature>
      <ExternalSignature>
        <ExternalSignatureID>716</ExternalSignatureID>
        <Signature>wmv</Signature>
        <SignatureType>File extension</SignatureType>
      </ExternalSignature>
      <InternalSignature>
        <SignatureID>82</SignatureID>
        <SignatureName>Windows Media Video</SignatureName>
        <SignatureNote>Header Object + Stream Properties Object (stream type = Video Stream) with WMV Compression ID</SignatureNote>
        <ByteSequence>
          <ByteSequenceID>150</ByteSequenceID>
          <PositionType>Absolute from BOF</PositionType>
          <Offset>0</Offset>
          <MaxOffset>
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          <IndirectOffsetLocation>
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          <PositionType>Variable</PositionType>
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        </ByteSequence>
      </InternalSignature>
      <RelatedFormat>
        <RelationshipType>Has priority over</RelationshipType>
        <RelatedFormatID>691</RelatedFormatID>
        <RelatedFormatName>Advanced Systems Format</RelatedFormatName>
        <RelatedFormatVersion>
        </RelatedFormatVersion>
      </RelatedFormat>
      <RelatedFormat>
        <RelationshipType>Has priority over</RelationshipType>
        <RelatedFormatID>692</RelatedFormatID>
        <RelatedFormatName>Windows Media Audio</RelatedFormatName>
        <RelatedFormatVersion>
        </RelatedFormatVersion>
      </RelatedFormat>
      <RelatedFormat>
        <RelationshipType>Is subtype of</RelationshipType>
        <RelatedFormatID>691</RelatedFormatID>
        <RelatedFormatName>Advanced Systems Format</RelatedFormatName>
        <RelatedFormatVersion>
        </RelatedFormatVersion>
      </RelatedFormat>
    </FileFormat>
    <SearchCriteria>Criteria</SearchCriteria>
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