Presentation by Francesca Di Donato of Linkedopencamera.it at "Open data: dati, conoscenza, valore", Topix conference, Turin, 3 Dec. 2010.

2. From “Open Camera”
http://servizi.radicalparty.org/freshinstall/cameraspese/tutte

3. To LinkedOpenCamera
http://www.linkedopencamera.it/

4. Why linked data?

5. your web site
Data is less valuable when siloed

6. A paradox as a premise
Plato Meno, XIV 80d–e/81a
And how will you enquire, Socrates, into that which
you do not know? What will you put forth as the
subject of enquiry? And if you find what you want,
how will you ever know that this is the thing which
you did not know?
I know, Meno, what you mean; but just see what a
tiresome dispute you are introducing. You argue
that man cannot enquire either about that which he
knows, or about that which he does not know; for if
he knows, he has no need to enquire; and if not, he
cannot; for he does not know the very subject
about which he is to enquire.

7. Anamnesys: a myth as an answer
Plato Meno, XIV 81c-d
“ Seeing then that the soul is immortal and has been born
many times, and has beheld all things both in this world
and in the nether realms, she has acquired knowledge of all
and everything; so that it is no wonder that she should be
able to recollect all that she knew before about virtue and
other things. For as all nature is akin, and the soul has
“
learned all things, there is no reason why we should not, by
remembering but one single thing—an act which men call
learning—discover everything else, if we have courage and
faint not in the search; since, it would seem, research and
learning are wholly recollection.

8. Value is in context
Thus,
what matters is

9. linking

10. Web of Documents
Hyperlinks
For humans
For machines
X

11. semantics is hidden, only human readers
can extract it from documents

12. Web of Data
Linked Open Data
Hyperlinks
For humans
same as agrees cites explains
For machines
cites Semantic Links
RDF Data RDF Data RDF Data RDF Data

13. Linked Data because
Something more of “Open Data” :-)
Formats and query languages standard and flexible
Data ready for the Semantic Web
Anyone can say anythink on anything and “link”...
mash up/cross data with other data...
added value for new users (citizens, SMEs)

14. Linked Data cloud, Sept 2010

15. Linked Data cloud, Sept 2010
....More than 15 billions triples

16. Linked data projects
UK gov
US gov
Municipalities of Toronto, London, Zaragoza, San Francisco
BBC
NYT
Library of Congress
German National Library
Europeana
Google
Facebook
Yahoo
....

17. LinkedOpenCamera
http://www.linkedopencamera.it/
Just an example
Raw data now!
PSI data free to all for any use
Not a LOD application, but a LOD source
Re-use of standard ontologies
Data Visualization: Faceted browsing
http://131.114.79.25:8080/facelet

18. Data Model (simplified)
Contratto
Ristorazione
Locazioni e Oneri Condominiali
tipo tipo
settore
settore
Ristorazione Self Service Seminario Locazione Marini 1
ammontare ammontare
fornitore fornitore
1,100,000 Euro 13,269,346.40 Euro
Milano 90 s.r.l
.......
........
regione sociale
sede legale
address ? Visure
Camerali
Corso del Rinascimento 19, RM
Via Ariosto 3, RM

19. How it was born
works for
works for works for
presented at
founder
founder
founder
works for uses data of
uses data of
founder
works for
works for

20. Next Steps
Raw data now!
(new fresh data)
Collaborations
Funding/Donations

21. Thank you!

22. Thank you!
CREDITS
AUTHOR
Francesca Di Donato <didonato@sp.unipi.it>
PHOTOS
Flickr / Silo Antelope / ken mcown
Flickr / Menu Board / LexnGer
THANKS
Christian Morbidoni, Michele Barbera, Giulio Andreini, Emanuela Minuto