Dublin core Presentation


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Presentation about Dublin Core for LIS 882 Metadata, Fall 2010, Dominican University.

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Dublin core Presentation

  1. 1. Dublin Core Mary Jo Chrabasz LIS 882
  2. 2. Dublin Core Metadata Initiative <ul><li>Initial roots at 2 nd International World Wide Web conference in Chicago, IL in 1994
  3. 3. Workshop to discuss metadata semantics held in 1995
  4. 4. Core set of semantics to categorize web for search & retrieval
  5. 5. Named for Dublin, Ohio where 1995 workshop was held
  6. 6. More conferences and workshops have been held in a number of countries, including England, Australia, Finland, Germany, Canada, Japan, Italy, and the United States
  7. 7. Schema maintained by the Dublin Core Metadata Initiative (DCMI) group </li></ul>
  8. 8. Dublin Core : Basic Elements 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 Rights
  9. 9. Sample Dublin Core Record DC.Title: A basic doll to knit DC.Creator: Carol Meldrum DC.Subject: Knitting DC.Subject: Knitting – Patterns DC.Description: A knitting pattern for a simple doll shape that can be dressed in any way. DC.Type: Text DC.Source: &quot;Excerpted from Knitted Icons: 25 Celebrity Doll Patterns by Carol Meldrum. Copyright 2007 by Collins & Brown. Excerpted with permission from Quick Books.&quot; DC.Publisher: Canadian Living DC.Format: text/html DC.Identifier: http://www.canadianliving.com/crafts/knitting/a_basic_doll_to_knit.php DC.Language: English
  10. 10. Sample Dublin Core record in XML <rdf: Description> <dc:title> A basic doll to knit </dc:title> <dc:creator> Carol Meldrum </dc:creator> <dc:subject> Knitting </dc:subject> <dc:subject> Knitting – Patterns </dc:subject> <dc:description> A knitting pattern for a simple doll shape that can be dressed in any way. </dc:description> <dc:type> Text </dc:type> <dc:source> &quot;Excerpted from Knitted Icons: 25 Celebrity Doll Patterns by Carol Meldrum. Copyright 2007 by Collins & Brown. Excerpted with permission from Quick Books.&quot; </dc:source> <dc:publisher> Canadian Living </dc:publisher> <dc:format> text/html </dc:format> <dc:identifier> http://www.canadianliving.com/crafts/knitting/a_basic_doll_to_knit.php </dc:identifier> <dc:language> English </dc:language> </rdf:Description>
  11. 11. Dublin Core continued <ul><li>All Dublin Core elements are considered optional and repeatable
  12. 12. There is no prescribed order to the elements nor any required elements
  13. 13. DC can be used with controlled vocabularies but does not require them
  14. 14. Qualified Dublin Core adds to Simple Dublin Core to make elements more specific
  15. 15. Includes additional elements such as Audience, Provenance, and RightsHolder that are not present in Simple Dublin Core
  16. 16. Qualifier should only enhance the element ; the information should still make sense if the qualifier is ignored, according to the &quot;Dumb-Down Principle&quot;
  17. 17. DCMI maintains a small vocabulary for Type </li></ul>
  18. 18. DC expressed using RDF & XML <ul><li>RDF stands for Resource Description Framework
  19. 19. Is designed to be read and used by machines
  20. 20. Is usually written in XML
  21. 21. Is made of &quot;triples&quot; </li><ul><li>Subject, predicate, object = triple
  22. 22. Ex: Optimus Prime -> is a -> Transformer </li></ul><li>Is part of the Semantic Web
  23. 23. Similar to Entity-Relationship models
  24. 24. Early specification of RDF and XML published in 1999 by W3C (World Wide Web Consortium) as a recommendation
  25. 25. A new version published as a set of related specifications in 2004 </li></ul>
  26. 26. RDF Triples
  27. 27. DCMI Abstract Model <ul><li>Provides a reference model against which DC encoding guidelines can be compared
  28. 28. Must be independent of any particular encoding syntax
  29. 29. Allows greater understanding of what we are trying to encode
  30. 30. Facilitates better mappings and translations between syntaxes
  31. 31. Particular encoding guidelines do not need to encode all of the abstract model but DCMI guidelines state that encoding guidelines should refer to the abstract model and indicate which parts are encoded, and which are not </li></ul>
  32. 32. DCMI Resource Model http://www.ukoln.ac.uk/metadata/dcmi/abstract-model/
  33. 33. DCMI Description Model
  34. 34. Resources History of the Dublin Core Metadata Initiative http://dublincore.org/about/history/ Dublin Core (Wikipedia) http://en.wikipedia.org/wiki/Dublin_Core DCMI Abstract Model, RDF, Description Model, Description Set http://iporter.wordpress.com/2010/02/28/dcmi-abstract-model-rdf-description-model-description-set/ RDF (Wikipedia) http://en.wikipedia.org/wiki/Resource_Description_Framework Resource Description Framework (RDF): Concepts and Abstract Syntax http://www.w3.org/TR/rdf-concepts/ Expressing Simple Dublin Core in RDF/XML http://dublincore.org/documents/dcmes-xml/ Expressing Qualified Dublin Core in RDF/XML http://dublincore.org/documents/dcq-rdf-xml/
  35. 35. Resources continued Modelling DC values as resources in RDF http://www.ukoln.ac.uk/metadata/dcmi/rdf-values/ Expressing Dublin Core Metadata using the Resource Description Framework (RDF) http://dublincore.org/documents/dc-rdf/ RDF/XML Syntax Specification http://www.w3.org/TR/REC-rdf-syntax/ DCMI Abstract Model http://www.ukoln.ac.uk/metadata/dcmi/abstract-model/ DCMI Abstract Model (DCMI website) http://dublincore.org/documents/2007/02/05/abstract-model/ What makes the linked data approach different http://dublincore.org/resources/training/NISO_Webinar_20100825/dcmi-webinar-02.pdf