1. Ontologies aka: your metadata elements

2. “ontology” / “vocabulary” / “term” / “element” “…vocabularies define the concepts and relationships (also referred to as “terms”) used to describe and represent an area of concern…” (W3C) ONTOLOGY is the formal term for VOCABULARY, which is a fancier term for TERM stated simply:

3. ontologies represent the predicate thing1relationship thing2

4. predicate ~ data element book123 titleThe well book123 creatorK. S. Maniam

5. Elements v. Instances Something to keep in mind

6. Elements dc:title (element definition) (an element)

7. Instances dc:title = “Steve Jobs” Instance data or Steve Jobs

8. Elements

9. Instances 245 10 $ a Steve Jobs / $ c by Walter Isaacson.

10. defining your elements: text

11. defining your elements: XML schema ACTIONABLE

12. defining your elements: RDF (or OWL) dc:title a rdf:Property; rdfs:label "Title"@en; dc:hasVersion ; dc:issued "2008-01-14"^^xsd:date; dc:modified "2010-10-11"^^xsd:date; rdfs:comment "A name given to the resource."@en; rdfs:isDefinedBy dc:; rdfs:range rdfs:Literal; rdfs:subPropertyOf ACTIONABLE…but in a different way Dublin Core

13. defining your elements: RDF (or OWL) title Title A word, character, or group of words and/or characters that names a resource or a work contained in it. RDA

14. Differences XML full set of metadata elements includes constraints (maximum, minimum, etc.) RDF/OWL individual properties includes relationships between properties

15. Similarities (XML, RDF) all elements are defined in a machine-actionable way mix ‘n match – can use elements from different namespaces

21. Each term must have a unique identifier* * unique on the web

22. “title” http://purl.org/dc/terms/title A name given to the resource. http://xmlns.com/foaf/0.1/title Values such as 'Mr', 'Mrs', 'Ms', 'Dr' etc. are expected. titlehttp://kcoyle.net/

23. Discovering ontologies and terms http://linkeddata.org

24. Discovering ontologies and terms http://labs.mondeca.com/dataset/lov/

25. Some useful ontologies Dublin Core – general documents, intellectual resources BIBO (Bibliographic Ontology) – academic articles and other resources FOAF (Friend of a Friend) – people, relationships BIO – biographical events GeoNames – places RDA elements MADS – for authority files FRBRer – official IFLA version ISBD – official IFLA version

26. Ontologies are “mix ‘n match” DC BIBO FOAF

27. British National Bibliography in RDF BNB FOAF RDA DC BIO BIBO

28. dc:title Connecting to the “cloud” #1 Use existing and common terms

29. dc:title lib:titleProper lib:parallelTitle sub-property #2 Create relationships to existing and common terms

30. Exercise 5a: Properties This is a dog named Dewey. His breed is golden retriever. His birthday is 12/25. His date of birth is 12/25/2004. He lives in Berkeley, California This photo was taken at the University of California in Berkeley.