The document discusses DiscoverEd, an open source search tool for open educational resources (OER) that are labeled with Creative Commons licenses. It describes how DiscoverEd uses curators to identify and add metadata to educational resources, which are then indexed using Nutch and can be queried based on metadata fields. Current work focuses on improving provenance tracking of curator metadata and developing tools to help curators publish more linked data descriptions of their resources.

1. Commodity Semantic Search: A Case Study of DiscoverEd Nathan R. Yergler Creative Commons Semantic Technology Conference 24 June 2010

2. share, reuse, and remix— legally

3. Creative Commons provides legal and technical tools that make sharing easy, legal, and scalable.

6. <a href=” http://creativecommons.org/licenses/by/3.0/ ” rel=”license”> Attribution 3.0 Unported </a>

7. <rdf:RDF xmlns:cc='http://creativecommons.org/ns#' xmlns:foaf='http://xmlns.com/foaf/0.1/' xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:dcq='http://purl.org/dc/terms/' > <cc:License rdf:about=&quot;http://creativecommons.org/licenses/by/3.0/&quot;> <cc:permits rdf:resource=&quot;http://creativecommons.org/ns#DerivativeWorks&quot;/> <cc:permits rdf:resource=&quot;http://creativecommons.org/ns#Distribution&quot;/> <cc:permits rdf:resource=&quot;http://creativecommons.org/ns#Reproduction&quot;/> <cc:requires rdf:resource=&quot;http://creativecommons.org/ns#Notice&quot;/> <cc:requires rdf:resource=&quot;http://creativecommons.org/ns#Attribution&quot;/> <cc:legalcode rdf:resource=&quot;http://creativecommons.org/licenses/by/3.0/legalcode&quot;/> <dcq:hasVersion>3.0</dcq:hasVersion> <foaf:logo rdf:resource=&quot;http://i.creativecommons.org/l/by/3.0/80x15.png&quot;/> <foaf:logo rdf:resource=&quot;http://i.creativecommons.org/l/by/3.0/88x31.png&quot;/> <cc:licenseClass rdf:resource=&quot;http://creativecommons.org/license/&quot;/> <dc:creator rdf:resource=&quot;http://creativecommons.org&quot;/> </cc:License> </rdf:RDF>

8. CC Rights Expression Language

9. CC licenses are based on international copyright law

10. There are hundreds of millions of pieces of CC-licensed content on the web

12. Learning materials that are freely available to use, remix, and redistribute.

13. Wide variety of format, content types, audience

14. CC licenses make this content interoperable

15. But how do you find OER you’re looking for?

19. Additional facets – subject, language, etc

21. A Curator may also be the Publisher

22. Or a Curator may add metadata to someone else’s resources

26. Curators & Feeds

28. Nutch

31. Output XML suitable for Google CSE

33. Labels and Facets worked best with fixed, limited vocabulary

34. License-filtered search unavailable

36. Simple scripts for generating seeds from the store

37. IndexingFilter plugin for injecting metadata into Nutch index

38. QueryFilter plugins for field-specific searches

39. DiscoverEd (Nutch)

42. Predicate filters had to be “hand-crafted”

43. Current DiscoverEd Work

45. Other organizations have expressed interest in using the DiscoverEd software

46. Making code available on Gitorious, http://gitorious.org/discovered

48. Working on integrating this with the query front end now

50. Exclude curators from their query

53. Map specific terms to URIs

54. For example, “tag” to “http://purl.org/dc/terms/subject”

57. Need a feedback loop to help drive this

58. Working on “dashboard” to see what's indexed, how, etc.

59. Second phase: documentation, tools to help improve their RDFa

61. Asheesh Laroia

62. Raphael Krut-Landau

63. Alex Kozak

64. Christine Geith

66. Bill & Melinda Gates Foundation

67. OSI

68. Michigan State University

69. AgShare

71. Customize display using structured data

73. Nutch provides a powerful, extensible platform for prototyping search tools

74. DiscoverEd software demonstrates semantic search without large hardware investment

75. http://wiki.creativecommons.org/DiscoverEd [email_address] @nyergler (identi.ca, twitter)