The document discusses the Semantic Web and Linked Open Data, emphasizing the role of Freebase as a socially managed semantic database containing numerous entities and relations. It highlights the challenges of polysemy and the need for effective reconciliation and entity resolution across various vocabularies. Additionally, it addresses the integration of explicit semantics in web content using technologies like RDFa and microdata to enhance information accessibility.

1. It's not what you said,
it's how you said it.
Jamie Taylor, Ph.D.
Text Analytic Summit
Boston 2010

2. What do y'all mean
"Semantics"
The Web!
Now with
Better Flavor!

6. Tim Berners-Lee, James Hendler
and Ora Lassila
May 2001

7. The Semantic Web?
The Cake
taken from http://www.w3.org/2007/Talks/0130-sb-W3CTechSemWeb/layerCake-4.png

8. Linked Open Data

9. The Real Web
http://en.wikipedia.org/wiki/File:Internet_map_1024.jpg

11. Wish it were real

12. Might be real

13. Is real, but don't believe it

14. Is currently useful

15. Entities

16. Identifiers Side Step Polysemy
Bono, A.K.A. Paul David Hewson
http://rdf.freebase.com/ns/en.paul_david_hewson

17. Vocabulary
Manufactures
http://rdf.freebase.com/ns/automotive.make.model_s

18. A socially managed semantic database

19. Freebase has Many Types of Things

22. Many Strong Identifiers
http://rdf.freebase.com/ns/en.berlin_wall
http://www.ellerdale.com/topics/view/0080-6ba0
http://www.bbc.co.uk/music/artists/7f347782-eb14-40c3-98e2-17b6e1bfe56c
http://musicbrainz.org/artist/7f347782-eb14-40c3-98e2-17b6e1bfe56c
http://rdf.freebase.com/ns/authority.musicbrainz.7f347782-eb14-40c3-98e2-17b6e1bfe56c

23. 12 Million Entites
350 Million Relations

24. Users contribute data
Users extend the data model

25. schema = vocabulary

26. 1500 types with 500+ instances!!
A range of of vocabularies....

27. Growing Freebase

28. Reconciliation
+=

29. Reconciliation
Relational Learning
Record Matching
Collective Entity Resolution
Equivalence Mining
Record Linking
Identity Matching

30. Reconciliation
"Excuse Me"
"Excuse Me"
"Harrison Ford"
"Harrison Ford"
"Vanity Fair"
"Maytime"

31. Reconciliation
"Fugitive"
"Excuse Me"
"Harrison Ford"
"Harrison Ford"
"Vanity Fair"
"Blade Runner"

32. A Graph of Entities

33. Vocabulary
contains
located
performed-at released-by
created
plays-in
plays-in
nationality
education
education
located

35. Reconciliation as "understanding"
contains
located
performed-at released-by
created
plays-in
plays-in
nationality
education
education
located

36. {
"/type/object/name":"Blade Runner",
"/type/object/type":"/film/film",
"/film/film/starring/actor":["Harrison Ford", "Rutger Hauer"],
"/film/film/director":"Ridley Scott",
"/film/film/release_date_s":"1981"
} [{
"id":"/guid/9202a8c04000641f8000000000009e89",
"name":["Blade Runner", "Bladerunner"],
"score":1.4320519,
"match":true,
"type":["/common/topic", "/film/film","/media_common/adapted_work", "/award/
award_winning_work",
......
]},
{
"id":"/guid/9202a8c04000641f80000000002643d0",
"name":["Blade"],
"score":0.48852453,
"match":false,
"type":["/common/topic", "/film/film", "/award/award_winning_work", "/award/
award_nominated_work",
.......
]},
{
"id":"/guid/9202a8c04000641f800000000e5daaae",
"name":["Blade"],
"score":0.46398318,
"match":false,
.....
http://data.labs.freebase.com/recon/

37. Data Everywhere

39. Wikipedia Features

40. Wikipedia Features
X
X
Error Prone -- Usually <99%

45. (Machine) Learning Semantics
get 5M type
types
assertions
2.8M Wikipedia topics
intersect the two calculate feature join feature counts generate type
sources counts per type with topics scores for topics
2.4M features
1.6G scores
1400 types
extract
features
37M features
5M articles
WEX

46. /people/person distribution
untyped topics
person topics
other topics
all topics
Data courtesy Viral Shah

47. RABJ: Humans in the loop

48. Thresholding Results
99% threshold at 16.75

49. /people/person assertions
threshold
53K /people/person
assertions

50. Training Wheels?
Semantics are Everywhere

53. A Strong Tag for Food Inc.
http://movi.es/BVl43

54. Widgets: Content Tags

58. Explicit Semantics

60. Rich Snippets
<div class="post-item restaurant-gen-info hreview-aggregate">
<div class="item vcard">
<h1 class="fn org">Taylor's Refresher</h1>
<div class="address">
<div class="ratings">
<ul class="star-rating-2 rating" title="4.0 star rating across 3 ratings">
<li class="current-rating average" style="width:80%;">4.0 star rating</li>
<li class="star">&nbsp;</li>
<li class="star">&nbsp;</li><li class="star">&nbsp;</li>
<li class="star">&nbsp;</li>
<li class="star">&nbsp;</li>
</ul>
<div class="rating-stats">
<span class="rating">
<span class="average">4.0</span>
</span> rating over
<span class="count">1</span> review
</div>

62. RDFa
microformats
HTML5 MicroData
Open Graph Protocol

63. Explicit Semantics in
Surprising Places

64. Blog Tags::Entities

65. Metaweb Topic Block

66. Widget Microdata
<div class="fb-widget"
id="fbtb-9a1f44348ad145b5b7d7d7d2376b0420"
style="border:0; outline:0; padding:0; margin:0;
position:relative;" itemscope="" itemid="http://
www.freebase.com/id/en/taylor_swift"
itemtype="http://www.freebase.com/id/music/
artist"> ..... </div>

67. Thickening the Graph

68. "Vocabulary" Pattern
taw shooter marksman
marble marksman
http://wordnet.freebaseapps.com
photo: http://sarabbit.openphoto.net

70. Review (neighborhood) Pattern
Eric Schlosser
E. Coli
Michael Pollan
Robert Kenner