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1. A Database Called The Web Nathan R. Yergler Creative Commons

2. First Things

3. This Talk Is About Semantic Web

4. RDFa

5. Using them to drive your applications

6. It is not about Distributed data stores

7. SQL Databases

8. That is, the titular “database” is a metaphor

9. And now I've used titular in a conference talk

10. share, reuse, and remix— legally

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13. <a href=” http://creativecommons.org/licenses/by/3.0/ ” ��=”l��Բ��”> Attribution 3.0 Unported </a>

14. Why do we care? Programs should be able to answer simple questions about licensed works. What is the work's license?

15. Allows commercial use?

16. Are derivative works allowed?

17. How do we attribute the work?

18. Semantic Web (a gross oversimplification in 120 seconds)

19. Down with silos!

20. RDF

21. (subject, predicate, object)

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23. RDF Subject and Predicate are URIs

24. Object is a URI or Literal

25. 2002

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28. Pervasive Problems Opaque to parsers

29. Opaque to humans

30. Easy to screw up

31. Overly verbose

32. 2009

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35. CC Rights Expression Language

36. Principles for HTML Encoding Independence & Extensibility

37. Don't Repeat Yourself (DRY)

38. Visual Locality

39. Remix Friendliness

40. RDFa Builds on [X]HTML

41. Uses a few attributes (rel, rev, about, href, property, resource) to encode RDF triples in [X]HTML

42. Extensible for emerging applications

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44. Attribution Metadata Users can assert a name and URL for Attribution

45. We encode this in the generated HTML

46. Our deeds display this information when we can detect it

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49. Where should I link to? >>> import rdfadict >>> dessert = 'http://www.flickr.com/photos/nathan_y/3637818168/' >>> p = rdfadict.RdfaParser() >>> p.parse_url(dessert)[dessert]['http://creativecommons.org/ns#attributionURL'] ['http://www.flickr.com/photos/nathan_y/']

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51. CC Network Launched October 2008

52. A place creators to collect work references

53. A platform for digital copyright registry exploration

54. Built on ccREL

55. Free Software: AGPL 3, available from code.creativecommons.org

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58. Network + License Badges

59. Reciprocal Ownership Metadata “ Identity” Work

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61. A “Registry” <span id="#nathan" about="#nathan" rel="sioc:member_of" property="sioc:name" resource="http://labs.creativecommons.org/~nathan/info/labs.html">Nathan Yergler</span> <ul> <li><a about="#nathan" rel="sioc:owner_of" href="http://labs.creativecommons.org/~nathan/info/db-called-web.html"> A Database Called The Web</a></li> </li> </ul>

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65. What about you?

66. Interface Considerations Javascript is limited to progressive enhancement RDFa builds on the existing DOM

67. We could insert the RDFa with Javascript but that severely increases demand on consumers

68. General Principles You're probably using templates already – make them useful for software, too.

69. Vocab mix-n-match is fine: use established vocabularies whenever possible (DC, etc).

70. If you're a market leader (or hope to be), commit to publishing a minimum set of information.

71. Think about your URIs – you're making a commitment to maintain them.

72. Why Bother? Enable mashups and remixes

73. You're probably making the information available anyway

74. It builds an open web

75. It adds value for your site

76. Google Recently announced support for RDFa in “Rich Snippets”

77. They're exploring ways to make this easier for “webmasters”

78. Yahoo Supports RDFa in many properties

79. Search Monkey lets you build “info bars”

80. BOSS lets you query for presence of metadata

81. Nathan R. Yergler Chief Technology Officer Creative Commons [email_address] tivecommons.org @nyergler {twitter | identi.ca} http://wiki.creativecommons.org/A_Database_Called_The_Web

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A Database Called The Web

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A Database Called The Web