MPEG21 Digital Item Declaration ISOIEC 210002: an overview

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MPEG-21 Digital Item Declaration (ISO/IEC
21000-2)an overview
Jeroen Bekaert and Herbert Van de Sompel Research
Library, Prototyping Team Los Alamos National
Laboratory
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From MPEG 1 to MPEG-21

• Potential impact of MPEG-21
• MPEG ISO/IEC Committee
• MPEG-1/MPEG-2/MPEG-4/MPEG-7/MPEG-21/MPEG-A
• Expected industry support
• MPEG-21 defines a normative open framework for
  multimedia delivery and consumption for use by
  all the players in the delivery and consumption
  chain
• Applicability to Digital Libraries
• Ability to accomodate any media type and genre
• MPEG-21 is modular
• Part 2 DID representation of digital objects
• Part 3 DII identification of digital objects
• Part 4 IPMP enforcement of rights expressions
• Part 5 REL declaration of rights expressions
• Part 7 DIA transcoding based on contextual
  information
• Part 10 DIP association of behaviors
• Part 16 BF binary representation of digital
  objects

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MPEG-21 DID

• ISO/IEC 21000-2 Digital Item Declaration
• First edition ISO Standard March 2004
• Second edition FDIS January 2005 (based on
  LANL/UGent proposals related to DL use)
• Representation of Digital Objects
• Within the MPEG-21 framework referred to as
  Digital Items
• 3 distinct sections
• Abstract Model DID
• Representation of the Model in XML (DIDL) DIDL
  document
• W3C XML Schema
• Other representation of DID may emerge
• ISO/IEC 21000-16 Binary Format
• RDF?
• Reference software ISO/IEC 21000-8

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MPEG-21 DID METS
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Abstract Model basic entities
container grouping of items and
descriptor/statement constructs pertaining to the
container
container
item represents a Digital Item aka Digital
Object aka asset. Descriptor/statement constructs
convey information about the Digital Item
descriptor/statement
item
component binding of descriptor/statements to
datastreams
descriptor/statement
item
resource datastream
component
component
descriptor/statement
resource
resource
resource
descriptor/statement
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Abstract Model anchor
anchor
fragment
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Abstract Model choice condition annotation
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OAIS, DID DIDL package vs. content
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DIDL XML Representationelement set
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DIDL XML Representationdata provision techniques

• Example of PDF resource provided By Value
• Example of XML resource provided By Value
• Example of PDF resource provided By Reference

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DIDL XML Representationsecondary information

• Secondary information pertaining to DIDL
  documents (package)
• via DIDLInfo element
• via attributes attached to DIDL element
• Secondary information pertaining to Digital Items
  (content)
• via Descriptor/Statement constructs
• via attributes attached to Container/Item/Componen
  t
• MPEG-21 defined uses
• Identification information MPEG-21 Part 3 DII
• Rights information MPEG-21 Part 5 REL
• Processing information MPEG-21 Part 10 DIP
• User environment information MPEG-21 Part 7
  DIA
• community/application specific uses
• LANL specific Descriptor/Statement constructs
• OAI-PMH specific Descriptor/Statement constructs

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Secondary informationMPEG-21 defined
identification information - content
ltdidlItemgt ltdidlDescriptorgt
ltdidlStatement mimeType"text/xml
charsetUTF-8"gt ltdiiIdentifier
xmlnsdii"urnmpegmpeg21200201-DII-NS"gt
urnisbn0-395-36341-1lt/diiIdentifiergt
lt/didlStatementgt lt/didlDescriptorgt
lt/didlItemgt
MPEG-21 diiIdentifier
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Secondary informationMPEG-21 defined rights
information - content
ltdidlItemgt ltdidlDescriptorgt
ltdidlStatement mimeType"text/xml
charsetUTF-8"gt ltrlicense
xmlnsr"urnmpegmpeg21200301-REL-R-NS"gt
lt!-- optionally, specific rights can be
added here.--gt ltrotherInfogt
ltdcrights xmlnsdc"http//purl.org/dc/elements/1
.1/"gt Copyright2003 American
Physical Societylt/dcrightsgt
lt/rotherInfogt              lt/rlicensegt
lt/didlStatementgt lt/didlDescriptorgt
lt/didlItemgt
MPEG-21 rlicense
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Secondary informationMPEG-21 defined behavioral
information - content
ltdidlComponentgt ltdidlDescriptorgt
ltdidlStatement mimeType"text/xml
charsetUTF-8"gt ltdipObjectType
xmlnsdip"urnmpegmpeg21200501-DIP-NS"gt
urnfoobarArgumentlt/dipObjectTypegt
lt/didlStatementgt lt/didlDescriptorgt
ltdidlResource mimeType"audio/mpeg"
ref"http//foo/myAudioFile.mp3"/gt lt/didlComponen
tgt
MPEG-21 dipObjectType
ltdidlItemgt ltdidlDescriptorgt
ltdidlStatement mimeType"text/xml
charsetUTF-8"gt ltdipArgument
xmlnsdip"urnmpegmpeg21200501-DIP-NS"gt
urnfoobarArgumentlt/dipArgumentgt
lt/didlStatementgt lt/didlDescriptorgt
ltdidlResourcegt function PlayTrack()
lt/didlResourcegt lt/didlItemgt
MPEG-21 dipArgument
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Secondary informationLANL defined creation
datetime information - package content
ltdidlDIDL diext"DIDcreated2004-12-04T010101Z"
xmlnsdidl"urnmpegmpeg21200202-DIDL-NS"
xmlnsdiext "http//library.lanl.gov/2004-04
/STB-RL/DIEXT"gt ltdidlItemgt
lt/didlItemgt lt/didlDIDLgt
LANL diextDIDcreated
ltdidlComponent id"uuid-a0577072-992a-11d8-b3f1-
fc62348d6ec0"gt ltdidlDescriptorgt
ltdidlStatement mimeType"text/xml
charsetUTF-8"gt ltdiadmAdmin
xmlnsdiadm"http//library.lanl.gov/2004-01/STB-R
L/DIADM"gt ltdctermscreated
xmlnsdcterms"http//purl.org/dc/terms/"gt
2004-05-18T154333Zlt/dctermscreatedgt
lt/diadmAdmingt lt/didlStatementgt
lt/didlDescriptorgt lt/didlComponentgt
LANL diadmAdmin
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Secondary informationLANL defined signature
constructs - content
ltdidlComponent id"uuid-a0577072-992a-11d8-b3f1-
fc62348d6ec0"gt ltdidlDescriptorgt
ltdidlStatement mimeType"text/xml
charsetUTF-8"gt ltdsigSignature
xmlnsdsig"http//www.w3.org/2000/09/xmldsig"gt
ltdsigSignedInfogt
ltdsigCanonicalizationMethod
Algorithm"http//www.w3.org/TR/2001/REC-xml-c14n-
20010315"/gt ltdsigSignatureMethod
Algorithm"http//www.w3.org/2000/09/xmldsigrsa-s
ha1"/gt ltdsigReference
URI"uuid-a0577072-992a-11d8-b3f1-fc62348d6ec0"gt
... lt/dsigReferencegt
lt/dsigSignedInfogt
ltdsigSignatureValuegtdRaxVQYPMd0vfzkbstaG8taNTtJA9
sF9ze3/xW6AeW9KCguIjHpmG2kAuDJhe
EA7X0uNf59UIanLlMiGh3ROzctwyO0z8vbKqjGxYUlt/dsig
SignatureValuegt lt/dsigSignaturegt
lt/didlStatementgt lt/didlDescriptorgt
lt/didlComponentgt
W3C dsigSignature
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Secondary informationLANL defined signature
constructs - package
ltdidlDIDL xmlnsdidl"urnmpegmpeg21200202-DID
L-NS"gt ltdidlDIDLInfogt ltdsigSignature
xmlnsdsig"http//www.w3.org/2000/09/xmldsig"gt
ltdsigSignedInfogt
ltdsigCanonicalizationMethod
Algorithm"http//www.w3.org/TR/2001/REC-xml-c14n-
20010315"/gt ltdsigSignatureMethod
Algorithm"http//www.w3.org/2000/09/xmldsigrsa-s
ha1"/gt ltdsigReferencegt
... lt/dsigReferencegt
lt/dsigSignedInfogt ltdsigSignatureValuegtdR
axVQYPMd0vfzkbstaG8taNTtJA9sF9ze3/xW6AeW9KCguIjHpm
G2kAuDJhe EA7X0uNf59UIanLlMiGh3ROzctwyO0
z8vbKqjGxYUlt/dsigSignatureValuegt
lt/dsigSignaturegt lt/didlDIDLInfogt
ltdidlItemgt ... lt/didlItemgt lt/didlDIDLgt
W3C dsigSignature
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Secondary informationLANL defined identification
information - package content

• Package identifier identifier associated with
  DIDL XML document
• e.g. infolanl-repo/i/UUID1
• content-identifier identifier(s) associated
  with content
• e.g. urnisbn123456789

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