<?xml version="1.0" encoding="utf-8"?>
<PRONOM-Report xmlns="http://pronom.nationalarchives.gov.uk">
  <report_format_detail>
    <FileFormat>
      <FormatID>1771</FormatID>
      <FormatName>AppleDouble Resource Fork</FormatName>
      <FormatVersion>1</FormatVersion>
      <FormatAliases>
      </FormatAliases>
      <FormatFamilies>
      </FormatFamilies>
      <FormatTypes>
      </FormatTypes>
      <FormatDisclosure>
      </FormatDisclosure>
      <FormatDescription>The resource fork is a construct of the Mac OS operating system used to store structured data in a file, alongside unstructured data stored within the data fork. The format specification is available here: http://support.apple.com/kb/TA32537?viewlocale=en_US

The format lacks an extension, and is instead represented by a file name consisting of ._&lt;filename resource fork belongs to&gt;</FormatDescription>
      <BinaryFileFormat>
      </BinaryFileFormat>
      <ByteOrders>
      </ByteOrders>
      <ReleaseDate>
      </ReleaseDate>
      <WithdrawnDate>
      </WithdrawnDate>
      <ProvenanceSourceID>1</ProvenanceSourceID>
      <ProvenanceName>Digital Preservation Department / The National Archives</ProvenanceName>
      <ProvenanceSourceDate>21 Sep 2016</ProvenanceSourceDate>
      <ProvenanceDescription>
      </ProvenanceDescription>
      <LastUpdatedDate>21 Sep 2016</LastUpdatedDate>
      <FormatNote>
      </FormatNote>
      <FormatRisk>
      </FormatRisk>
      <TechnicalEnvironment>
      </TechnicalEnvironment>
      <FileFormatIdentifier>
        <Identifier>fmt/966</Identifier>
        <IdentifierType>PUID</IdentifierType>
      </FileFormatIdentifier>
      <FileFormatIdentifier>
        <Identifier>multipart/appledouble</Identifier>
        <IdentifierType>MIME</IdentifierType>
      </FileFormatIdentifier>
      <Developers>
        <DeveloperID>15</DeveloperID>
        <DeveloperName>
        </DeveloperName>
        <OrganisationName>Apple Computer, Inc.</OrganisationName>
        <DeveloperCompoundName>Apple Computer, Inc.</DeveloperCompoundName>
      </Developers>
      <Support>
        <SupportID>15</SupportID>
        <SupportName>
        </SupportName>
        <OrganisationName>Apple Computer, Inc.</OrganisationName>
        <SupportCompoundName>Apple Computer, Inc.</SupportCompoundName>
      </Support>
      <InternalSignature>
        <SignatureID>1330</SignatureID>
        <SignatureName>Apple Double Resource Fork (v1)</SignatureName>
        <SignatureNote>BOF: 4 byte AppleDouble Magic Number 0x00051607, then 4 byte version number 0x00010000</SignatureNote>
        <ByteSequence>
          <ByteSequenceID>1603</ByteSequenceID>
          <PositionType>Absolute from BOF</PositionType>
          <Offset>0</Offset>
          <MaxOffset>196</MaxOffset>
          <IndirectOffsetLocation>
          </IndirectOffsetLocation>
          <IndirectOffsetLength>
          </IndirectOffsetLength>
          <Endianness>
          </Endianness>
          <ByteSequenceValue>0005160700010000</ByteSequenceValue>
        </ByteSequence>
      </InternalSignature>
    </FileFormat>
    <SearchCriteria>Criteria</SearchCriteria>
  </report_format_detail>
</PRONOM-Report>
