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Intro to PBCore Zen, PBCore workshop, AMIA 2011 - jack brighton

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Jack Brighton's presentation on the basics of moving image metadata, structured data, the PBCore metadata standard, and why it all matters to archivists. This was one part of an all-day workshop presented at the 2011 AMIA Conference in Austin, Texas on Wednesday, November 16, 2011.

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Intro to PBCore Zen, PBCore workshop, AMIA 2011 - jack brighton

  1. 1. Intro to PBCore Zen Jack Brighton director of new media & innovation Illinois Public Media jackb@illinois.edu
  2. 2. PART ONE:Why does metadata matter?
  3. 3. A story about broadcasting
  4. 4. WILL Radio interview with John Brady Kiesling, former U.S. diplomat, on“The War In Iraq: U.S. Foreign Policy And The Crisis Of InternationalLegitimacy,” Focus 580, September 23, 2005Interviewer: Jack BrightonProducer: Harriet Williamson
  5. 5. Descriptive Metadata• title:Focus 580 on WILL-AM• subject: The War In Iraq: U.S. Foreign Policy And The Crisis Of International Legitimacy• description: U.S. diplomat Interview with John Brady Kiesling, former• genre: politics, United States, Iraq, foreign policy, war• date of broadcast: September 23, 2005• etcetera...
  6. 6. Administrative Metadata• creator: WILL Radio• publisher: WILL Public Media• copyright holder: University of Illinois• rights summary: may be repurposed for non-commercial and educational purposes with attribution to WILL• etcetera...
  7. 7. Technical Metadata• format:broadcast wav file• sampling rate: 44.1 kHz• bit depth:16 bit• tracks:mono• file size: 248,673,242 bites• location:Enco DAD cut #36465• etcetera...
  8. 8. a media object
  9. 9. as a web page
  10. 10. media object as rss feed <?xml version="1.0" encoding="UTF-8" ?>- <rss xmlns:itunes="http://www.itunes.com/DTDs/Podcast-1.0.dtd" version="2.0">- <channel> <title>Focus 580 on WILL-AM</title> <description>An intelligent interview program on current affairs</description> <link>http://www.will.uiuc.edu/am/focus</link> <language>en-us</language> <copyright>Copyright 2005 University of Illinois</copyright> <itunes:image href="http://www.will.uiuc.edu/am/focus/images/focuspodcast.jpg" /> <lastBuildDate>Fri, 23 Sep 2005 12:10:00 CST</lastBuildDate> <pubDate>Fri, 23 Sep 2005 12:10:00 CST</pubDate> <docs>http://blogs.law.harvard.edu/tech/rss</docs> <webMaster>jackb@uiuc.edu</webMaster>- <item> <title>The War In Iraq: U.S. Foreign Policy And The Crisis Of International Legitimacy</title> <link>http://will.uiuc.edu/am/focus</link> <description>Interview with John Brady Kiesling, former U.S. diplomat</description> <enclosure url="http://www.will.uiuc.edu/willmp3/focus050923a.mp3" length="24767532"type="audio/mpeg" /> <category>Current Events</category> <pubDate>Fri, 23 Sep 2005 12:10:00 CST</pubDate> </item> </channel> </rss>
  11. 11. rss feed viewed in Firefox
  12. 12. rss feed in iTunes
  13. 13. as a Dublin Core record<?xml version="1.0"?><!DOCTYPE rdf:RDF SYSTEM "http://dublincore.org/documents/2002/07/31/dcmes-xml/dcmes-xml-dtd.dtd"><rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/"> <rdf:Description rdf:about="http://will.atlas.uiuc.edu/focus580/interview/focus050923a/"> <dc:title> The War In Iraq: U.S. Foreign Policy And The Crisis Of International Legitimacy </dc:title> <dc:creator> WILL Public Media - http://will.illinois.edu </dc:creator> <dc:subject> WILL; public affairs; public radio; interviews; talk show; NPR; Illinois; Indiana; University of Illinois; Iraq; United States; Foreign Policy </dc:subject> <dc:description> Interview with John Brady Kiesling, former U.S. Diplomat </dc:description> <dc:publisher> WILL-AM, University of Illinois </dc:publisher> <dc:contributor> Jack Brighton, interviewer </dc:contributor> <dc:type> Sound </dc:type> <dc:language> en </dc:language> <dc:relation> http://will.illinois.edu/media/focus050923a.mp3 </dc:relation> <dc:rights> c 2008 University of Illinois </dc:rights> </rdf:Description></rdf:RDF>
  14. 14. with more detail as a PBCore record:<?xml version="1.0" encoding="UTF-8"?> <PBCoreDescriptionDocument xmlns="http://www.pbcore.org/PBCore/PBCoreNamespace.html"> <pbcoreIdentifier> <identifier>focus050923a</identifier> <identifierSource>Illinois Public Media</identifierSource> </pbcoreIdentifier> <pbcoreTitle> <title>The War In Iraq: U.S. Foreign Policy And The Crisis Of International Legitimacy</title> <titleType>Interview</titleType> </pbcoreTitle> <pbcoreSubject> <subject>Iraq</subject> <subjectAuthorityUsed>Illinois Public Media Subjects</subjectAuthorityUsed> </pbcoreSubject> <pbcoreSubject> <subject>Insurgency--Iraq</subject> <subjectAuthorityUsed>Library of Congress Subject Headings</subjectAuthorityUsed> </pbcoreSubject> <pbcoreDescription> <description>WILL Radio interview with John Brady Kiesling, former U.S. diplomat, on “The War In Iraq: U.S. Foreign Policy And The Crisis Of International Legitimacy,”</ description> <descriptionType>Abstract</descriptionType> </pbcoreDescription> <pbcoreCoverage> <coverage>Iraq</coverage> <coverageType>Spatial</coverageType> </pbcoreCoverage> <pbcoreCreator> <creator>WILL-AM</creator> <creatorRole>Creator</creatorRole> </pbcoreCreator> <pbcorePublisher> <publisher>University of Illinois</publisher> <publisherRole>Copyright Holder</publisherRole> </pbcorePublisher> <pbcoreRightsSummary> <rightsSummary>Permission granted by the copyright holder to stream and download for non-profit and educational use.</rightsSummary> </pbcoreRightsSummary> <pbcoreInstantiation> <pbcoreFormatID> <formatIdentifier>focus050923a.mp3</formatIdentifier> <formatIdentifierSource>Illinois Public Media</formatIdentifierSource> </pbcoreFormatID> <dateCreated>Fri, 23 Sep 2005 12:00:00 CST</dateCreated> <dateIssued>Fri, 23 Sep 2005 12:10:00 CST</dateIssued> <formatDigital>mp3</formatDigital> <formatLocation>http://will.illinois.edu/media/focus050923a.mp3</formatLocation> <formatMediaType>Sound</formatMediaType> <formatGenerations>Copy: access</formatGenerations> <formatDuration>00:52:08</formatDuration> </pbcoreInstantiation> </PBCoreDescriptionDocument>
  15. 15. XML documents
  16. 16. Structured Data
  17. 17. Data Portability
  18. 18. Interoperability
  19. 19. Ubiquitous Connections
  20. 20. We are not just cataloging,We are enabling connection
  21. 21. Digital Media Ecology
  22. 22. “The opportunity before all of us is living up to thedream of the Library of Alexandria and then taking it a step further: Universal access to all knowledge. Interestingly, it is now technically doable. “ Brewster Kahle, founder of the Internet Archive
  23. 23. PART TWO:PBCore Origins
  24. 24. Dublin Core (ISO 15836)The Dublin Core set of metadata elements provides a small andfundamental group of text elements through which most resourcescan be described and catalogued. Using only 15 base text fields, aDublin Core metadata record can describe physical resources suchas books, digital materials such as video, sound, image, or text files,and composite media like web pages. http://en.wikipedia.org/wiki/Dublin_Core
  25. 25. Simple Dublin Core The Simple Dublin Core Metadata Element Set (DCMES) consists of 15 metadata elements: • Title • Creator • Subject • Description • Publisher • Contributor • Date • Type • Format • Identifier • Source • Language • Relation • Coverage • RightsReference: http://dublincore.org/documents/usageguide/elements.shtml
  26. 26. DC Structure:Resource: the media item in the abstract
  27. 27. DC Structure:Manifestation: a physical or digital instance of the resource
  28. 28. DC Structure:A Resource can have one and only one Manifestation
  29. 29. DC Structure:• Resource: the media item in the abstract• Manifestation: a physical or digital instance of the resource• A Resource can have one and only one Manifestation
  30. 30. The One-to-One PrincipleIn general Dublin Core metadata describes one manifestation orversion of a resource, rather than assuming that manifestationsstand in for one another. For instance, a jpeg image of the Mona Lisahas much in common with the original painting, but it is not thesame as the painting. http://dublincore.org/documents/usageguide/
  31. 31. The One-to-One principle is inefficient and/ormessy when dealing with multiple manifestations of amedia resource.Steven J. Miller, The One-To-One Principle: Challenges in CurrentPractice
  32. 32. Other Dublin Core gaps
  33. 33. Other Dublin Core gaps• DC has no place for genre
  34. 34. Other Dublin Core gaps• DC has no place for genre• DC says nothing about versioning or provenance
  35. 35. Other Dublin Core gaps• DC has no place for genre• DC says nothing about versioning or provenance• DC says little about media format
  36. 36. PBCore• built on Dublin Core• created by the American public broadcasting community for use by public media• funded by the Corporation for Public Broadcasting pbcore.org
  37. 37. PBCore Strengths• Simple like Dublin Core• Improved for moving images• Solves the one-to-one problem• Strong on technical metadata• Extensible• User community growth
  38. 38. People using PBCore• PBS & NPR & local stations• Film Archives• Northeast Historic Film• Democracy Now!• Fresh Air with Terry Gross• WNYC• The Dance Heritage Collection• Alliance for Community Media• Open Media Project• The Rock n’ Roll Hall of Fame• The American Archive• User community growing fast...
  39. 39. PBCore Community• pbcore.org• PBCore listserv• pbcoreresources.org
  40. 40. PBCore Versions• 1.0 - first public release in 2005• 1.1 - January 2007, minor fixes• 1.2 - December 2008, added pbcoreEssenceTrack• 1.3 - August 2010, added the top-level element pbcoreAssetType• 2.0 - February 2011, many improvements based on user-community input• 2.1 - Hopefully soon
  41. 41. PBCore Structure:Asset: the media item in the abstract
  42. 42. PBCore Structure:Instantiation: a physical or digital instance of the asset
  43. 43. PBCore Structure:A single Asset can have many Instantiations
  44. 44. PBCore Structure:• Asset: the media item in the abstract• Instantiation: a physical or digital instance of the asset• A single Asset can have many Instantiations
  45. 45. PBCore Instantiations
  46. 46. PBCore Instantiations• Instantiations capture technical metadata for either physical or digital media objects
  47. 47. PBCore Instantiations• Instantiations capture technical metadata for either physical or digital media objects• This is needed for provenance and preservation
  48. 48. PBCore Instantiations• Instantiations capture technical metadata for either physical or digital media objects• This is needed for provenance and preservation• Also needed by software applications that handle digital media
  49. 49. PBCore Instantiations• Instantiations capture technical metadata for either physical or digital media objects• This is needed for provenance and preservation• Also needed by software applications that handle digital media• Also important for answering the question “Where is the media object?”
  50. 50. PBCore compared with Dublin Core Dublin Core PBCoretitle titlecreator creatorsubject subjectdescription descriptionpublisher publishercontributor contributordate datetype typeformat formatidentifier identifiersource sourcelanguage languagerelation relationcoverage coveragerights rights
  51. 51. Required Elements in PBCore • Identifier • Title • Description
  52. 52. additional descriptive elements • Genre • Audience Level • Audience Rating • Creator • Contributor • Publisher
  53. 53. new PBCore root element Collection
  54. 54. PBCore Instantiation additional elements • instantiationIdentifier • instantiationDate • instantiationDimensions • instantiationPhysical • instantiationDigital • instantiationStandard • instantiationLocation • instantiationMediaType • instantiationGenerations • instantiationFileSize • instantiationTimeStart • instantiationDuration • instantiationDataRate • instantiationColors • instantiationTracks • instantiationChannelConfiguration • instantiationLanguage • instantiationAlternativeModes • instantiationEssenceTrack • instantiationRelation • instantiationRelationType • instantiationRelationIdentifier • instantiationRights • rightsSummary • rightsLink • rightsEmbedded • instantiationAnnotation • instantiationPart • instantiationExtension
  55. 55. PBCore Instantiation additional elements • instantiationIdentifier • instantiationDate • instantiationDimensions • instantiationPhysical • instantiationDigital • instantiationStandard • instantiationLocation • instantiationMediaType • instantiationGenerations • instantiationFileSize • instantiationTimeStart • instantiationDuration • instantiationDataRate • instantiationColors • instantiationTracks • instantiationChannelConfiguration • instantiationLanguage • instantiationAlternativeModes • instantiationEssenceTrack • instantiationRelation • instantiationRelationType • instantiationRelationIdentifier • instantiationRights • rightsSummary • rightsLink • rightsEmbedded • instantiationAnnotation • instantiationPart • instantiationExtension
  56. 56. PBCore instantiationEssenceTrack subelements: instantiationEssenceTrack • essenceTrackType • essenceTrackIdentifier • essenceTrackStandard • essenceTrackEncoding • essenceTrackDataRate • essenceTrackFrameRate • essenceTrackPlaybackSpeed • essenceTrackSamplingRate • essenceTrackBitDepth • essenceTrackFrameSize • essenceTrackAspectRatio • essenceTrackTimeStart • essenceTrackDuration • essenceTrackLanguage • essenceTrackAnnotation • essenceTrackExtension
  57. 57. Instantiation Tools for Digital Media • GetID3 • FFMPEG • MediaInfo • MediaInfo Mac application • PBCore Instantiationizer
  58. 58. PART THREE: Tools
  59. 59. Stupid CMS Tricks
  60. 60. ExpressionEngine
  61. 61. The TIME Project
  62. 62. Drupal
  63. 63. It’s about Data Portability
  64. 64. We can export and import structured data
  65. 65. Ensemble Video
  66. 66. COVE
  67. 67. COVE
  68. 68. Merlin
  69. 69. Merlin
  70. 70. Catalog by any means necessary
  71. 71. But follow standards andprovide structured data
  72. 72. PART FOUR:PBCore 2.0
  73. 73. PBCore 1.x weaknesses• No way to record separate dates for the Asset and its Instantiations• No way to record information about multi-part Instantiations• No way to record distinct rights information for different Instantiations• No way to show relationships between Instantiations, e.g. that an MPEG4 file was made from a master video file• You can record that Harrison Ford is an Actor, but you can’t specify what role he plays in the film• You can’t identify clip information within an asset, e.g. where in the timeline a subject or person occurs• You can’t bundle together a collection of PBCore 1.x records for easy transfer to other technical systems and collections
  74. 74. new in PBCore 2.0 Attributes
  75. 75. pbcoreIdentifier element: PBCore 1.x<pbcoreIdentifier> <identifier>focus050923a</identifier> <identifierSource>Illinois Public Media</identifierSource></pbcoreIdentifier>
  76. 76. pbcoreIdentifier element: PBCore 1.x<pbcoreIdentifier> <identifier>focus050923a</identifier> <identifierSource>Illinois Public Media</identifierSource></pbcoreIdentifier> PBCore 2.0
  77. 77. pbcoreIdentifier element: PBCore 1.x <pbcoreIdentifier> <identifier>focus050923a</identifier> <identifierSource>Illinois Public Media</identifierSource> </pbcoreIdentifier> PBCore 2.0 <pbcoreIdentifier source="Illinois Public Media"ref="http://will.illinois.edu">focus050923a</pbcoreIdentifier>
  78. 78. Key Concept: URI: Uniform Resource Identifiera string of characters used to identify a name or a resource on theInternet. Such identification enables interaction with representations ofthe resource over a network (typically the World Wide Web) usingspecific protocols.
  79. 79. pbcoreSubject element: PBCore 1.x<pbcoreSubject> <subject>Insurgency--Iraq</subject> <subjectAuthorityUsed>Library of Congress Subject Headings</subjectAuthorityUsed></pbcoreSubject>
  80. 80. pbcoreSubject element: PBCore 1.x<pbcoreSubject> <subject>Insurgency--Iraq</subject> <subjectAuthorityUsed>Library of Congress Subject Headings</subjectAuthorityUsed></pbcoreSubject> PBCore 2.0
  81. 81. pbcoreSubject element: PBCore 1.x<pbcoreSubject> <subject>Insurgency--Iraq</subject> <subjectAuthorityUsed>Library of Congress Subject Headings</subjectAuthorityUsed></pbcoreSubject> PBCore 2.0<pbcoreSubject source="Library of Congress Subject Headings" ref="http://id.loc.gov/authorities/sh2008123892#concept">Insurgency--Iraq</pbcoreSubject>
  82. 82. PBCore 2.0 subject with time attributes<pbcoreSubject source="Library of Congress Subject Headings"ref="http://id.loc.gov/authorities/sh2008123892#concept"startTime=”00:23:14” endTime=”00:27:28”>Insurgency--Iraq</pbcoreSubject>
  83. 83. pbcoreCoverage element: PBCore 1.x<pbcoreCoverage> <coverage>Iraq</coverage> <coverageType>Spatial</coverageType></pbcoreCoverage>
  84. 84. pbcoreCoverage element: PBCore 1.x<pbcoreCoverage> <coverage>Iraq</coverage> <coverageType>Spatial</coverageType></pbcoreCoverage> PBCore 2.0
  85. 85. pbcoreCoverage element: PBCore 1.x<pbcoreCoverage> <coverage>Iraq</coverage> <coverageType>Spatial</coverageType></pbcoreCoverage> PBCore 2.0<pbcoreCoverage> <coverage source="ISO-3166" ref="http://www.geonames.org/countries/IQ/iraq.html">IRQ</coverage> <coverageType>Spatial</coverageType></pbcoreCoverage>
  86. 86. pbcoreCreator element: PBCore 1.x<pbcoreCreator> <creator>WILL-AM</creator> <creatorRole>Production Unit</creatorRole></pbcoreCreator>
  87. 87. pbcoreCreator element: PBCore 1.x<pbcoreCreator> <creator>WILL-AM</creator> <creatorRole>Production Unit</creatorRole></pbcoreCreator> PBCore 2.0
  88. 88. pbcoreCreator element: PBCore 1.x<pbcoreCreator> <creator>WILL-AM</creator> <creatorRole>Production Unit</creatorRole></pbcoreCreator> PBCore 2.0<pbcoreCreator> <creator affiliation="University of Illinois" ref=”http://will.illinois.edu/am”>WILL-AM</creator> <creatorRole>Production Unit</creatorRole></pbcoreCreator>
  89. 89. pbcoreContributor element: PBCore 1.x<pbcoreContributor> <contributor>John Brady Kiesling</contributor> <contributorRole>Interviewee</contributorRole></pbcoreContributor>
  90. 90. pbcoreContributor element: PBCore 1.x<pbcoreContributor> <contributor>John Brady Kiesling</contributor> <contributorRole>Interviewee</contributorRole></pbcoreContributor> PBCore 2.0
  91. 91. pbcoreContributor element: PBCore 1.x <pbcoreContributor> <contributor>John Brady Kiesling</contributor> <contributorRole>Interviewee</contributorRole> </pbcoreContributor> PBCore 2.0 <pbcoreContributor> <contributor ref="http://en.wikipedia.org/wiki/Brady_Kiesling">John Brady Kiesling</contributor> <contributorRole source="PBCore" ref="http://pbcore.org/vocabularies/contributorRole#interviewee">Interviewee</contributorRole> </pbcoreContributor>
  92. 92. PBCore 2.0 Contributor with portrayal attribute <pbcoreContributor> <contributor ref="http://en.wikipedia.org/wiki/Sean_Connery">Sean Connery</contributor> <contributorRole portrayal=”James Bond” source="PBCore" ref="http://pbcore.org/vocabularies/contributorRole#actor">Actor</contributorRole> </pbcoreContributor>
  93. 93. pbcoreRightsSummary: PBCore 1.x <pbcoreRightsSummary> <rightsSummary>Permission granted by the copyright holder to stream and download fornon-profit and educational use.</rightsSummary>
  94. 94. pbcoreRightsSummary: PBCore 1.x <pbcoreRightsSummary> <rightsSummary>Permission granted by the copyright holder to stream and download fornon-profit and educational use.</rightsSummary> PBCore 2.0
  95. 95. pbcoreRightsSummary: PBCore 1.x <pbcoreRightsSummary> <rightsSummary>Permission granted by the copyright holder to stream and download fornon-profit and educational use.</rightsSummary> PBCore 2.0 <pbcoreRightsSummary> <rightsSummary>Permission granted by the copyright holder to stream and download for non-profitand educational use under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Generic (CCBY-NC-SA 2.0)</rightsSummary> <rightsLink>http://creativecommons.org/licenses/by-nc-sa/2.0/</rightsLink> </pbcoreRightsSummary>
  96. 96. PBCore 2.0 Common Attributes
  97. 97. PBCore 2.0 Common Attributes • Source • Ref • Version • Annotation
  98. 98. PBCore 2.0 Common Attributes • Source • Ref • Version • Annotation • startTime • endTime • timeAnnotation
  99. 99. a PBCore 2.0 record:<?xml version="1.0" encoding="UTF-8"?> <PBCoreDescriptionDocument xmlns="http://www.pbcore.org/PBCore/PBCoreNamespace.html"> <pbcoreAssetType ref="http://pbcore.org/vocabularies/pbcoreAssetType#program">Program</pbcoreAssetType> <pbcoreAssetDate>Fri, 23 Sep 2005 12:00:00 CST</pbcoreAssetDate> <pbcoreIdentifier source="Illinois Public Media" ref="http://will.illinois.edu">focus050923a</pbcoreIdentifier> <pbcoreTitle titleType="Main">The War In Iraq: U.S. Foreign Policy And The Crisis Of International Legitimacy</pbcoreTitle> <pbcoreSubject subjectType="topic" source="Illinois Public Media Subjects">Iraq</pbcoreSubject> <pbcoreSubject subjectType="topic" source="Library of Congress Subject Headings" ref="http://id.loc.gov/authorities/sh2008123892#concept">Insurgency--Iraq</ pbcoreSubject> <pbcoreDescription descriptionType="Summary" ref="http://pbcore.org/vocabularies/pbcoreDescription/descriptionType#summary">WILL Radio interview with John Brady Kiesling, former U.S. diplomat, on “The War In Iraq: U.S. Foreign Policy And The Crisis Of International Legitimacy”</pbcoreDescription> <pbcoreGenre source="PBCore" ref="http://pbcore.org/vocabularies/pbcoreGenre#interview">Interview</pbcoreGenre> <pbcoreCoverage> <coverage source="ISO-3166" ref="http://www.geonames.org/countries/IQ/iraq.html">IRQ</coverage> <coverageType>Spatial</coverageType> </pbcoreCoverage> <pbcoreCreator> <creator affiliation="Illinois Public Media">Jack Brighton</creator> <creatorRole>Interviewer</creatorRole> </pbcoreCreator> <pbcoreCreator> <creator affiliation="University of Illinois" ref="http://will.illinois.edu/am">WILL-AM</creator> <creatorRole>Production Unit</creatorRole> </pbcoreCreator> <pbcoreContributor> <contributor ref="http://en.wikipedia.org/wiki/Brady_Kiesling">John Brady Kiesling</contributor> <contributorRole source="PBCore" ref="http://pbcore.org/vocabularies/contributorRole#interviewee">Interviewee</contributorRole> </pbcoreContributor> <pbcorePublisher> <publisher ref=”http://illinois.edu”>University of Illinois</publisher> <publisherRole ref="http://pbcore.org/vocabularies/publisherRole#copyright-holder">Copyright Holder</publisherRole> </pbcorePublisher> <pbcoreRightsSummary> <rightsSummary>Permission granted by the copyright holder to stream and download for non-profit and educational use under a Creative Commons Attribution- NonCommercial-ShareAlike 2.0 Generic (CC BY-NC-SA 2.0)</rightsSummary> <rightsLink>http://creativecommons.org/licenses/by-nc-sa/2.0/</rightsLink> </pbcoreRightsSummary> <pbcoreInstantiation> <instantiationIdentifier source="Illinois Public Media" ></instantiationIdentifier> <instantiationDate dateType="date created">Fri, 23 Sep 2005 12:00:00 CST</instantiationDate> <instantiationDate dateType="date issued">Fri, 23 Sep 2005 12:10:00 CST</instantiationDate> <instantiationDigital>mp3</instantiationDigital> <instantiationLocation>http://will.illinois.edu/media/focus050923a.mp3</instantiationLocation> <instatiationMediaType>Sound</instatiationMediaType> <instantiationGenerations>Copy: access</instantiationGenerations> <instantiationFileSize unitsOfMeasure="bytes">24767532</instantiationFileSize> <instantiationDuration>00:52:08</instantiationDuration> </pbcoreInstantiation> </PBCoreDescriptionDocument>
  100. 100. PART FIVE:Ontology
  101. 101. Is bark what a dog says or what a tree grows?
  102. 102. Systems of meaning:
  103. 103. Systems of meaning:• Taxonomy: The use of Controlled Vocabularies created and maintained by authorities, e.g. Library of Congress Subject Headings, or PBCore lists on the Open Metadata Registry
  104. 104. Systems of meaning:• Taxonomy: The use of Controlled Vocabularies created and maintained by authorities, e.g. Library of Congress Subject Headings, or PBCore lists on the Open Metadata Registry• Folksonomy: User tagging of content with freestyle keywords for which no authority beyond the user exists
  105. 105. Systems of meaning:• Taxonomy: The use of Controlled Vocabularies created and maintained by authorities, e.g. Library of Congress Subject Headings, or PBCore lists on the Open Metadata Registry• Folksonomy: User tagging of content with freestyle keywords for which no authority beyond the user exists• Taxonomy + Folksonomy = Powerful stuff
  106. 106. Web Services can mapmetadata formats and taxonomies
  107. 107. Linked Data
  108. 108. Intro to PBCore Zen Jack Brighton director of new media & innovation Illinois Public Media jackb@illinois.edu

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