Here is a picture.
Here is a picture.
Of Albert Einstein
Here is a picture
Of Albert Einstein
And his famous equation: e=mc2
Here is a picture
Of Albert Einstein
And his famous equation: e=mc2
Actually, it's a picture of a sculpture of Albert Einstein
Here is a picture
Of Albert Einstein
And his famous equation: e=mc2
Actually, it's a picture of a sculpture of Albert Einstein
Find out more...
Wouldn't it be great if your computer could do all that looking up for you?
http://www.w3.org/2012/Talks/0710_phila_bcs/einstein.jpg is a http://en.wikipedia.org/wiki/Image.
Of http://en.wikipedia.org/wiki/Albert_Einstein
And his famous equation: http://en.wikipedia.org/wiki/Mass-energy_equivalence
Actually, it's a http://en.wikipedia.org/wiki/Image of a http://en.wikipedia.org/wiki/Sculpture of http://en.wikipedia.org/wiki/Albert_einstein
Previous data model is an over-simplification.
HTTP GET on http://en.wikipedia.org/wiki/Albert_Einstein returns:
200 OK Cache-Control: private, s-maxage=0, max-age=0, must-revalidate Connection: close Date: Sat, 07 Jul 2012 09:10:07 GMT Server: Apache Vary: Accept-Encoding,Cookie Content-Language: en Content-Length: 351336 Content-Type: text/html; charset=UTF-8 Expires: Thu, 01 Jan 1970 00:00:00 GMT Last-Modified: Fri, 06 Jul 2012 15:21:23 GMT
Hence DBpedia
For each Wikipedia entry, creates two URIs:
URIs resolved through HTTP content negotiation and 303 redirection.
Source of long-running debate, known as httpRange-14, that we will NOT get into today. See Jeni Tennison's latest blog post on the matter.
<rdf:Description rdf:about="http://dbpedia.org/resource/Le%C3%B3_Szil%C3%A1rd"> <dbpedia-owl:academicAdvisor rdf:resource="http://dbpedia.org/resource/Albert_Einstein" /> <dbpprop:academicAdvisors rdf:resource="http://dbpedia.org/resource/Albert_Einstein" /> </rdf:Description> <rdf:Description rdf:about="http://dbpedia.org/resource/Stephen_Hawking"> <dbpedia-owl:influencedBy rdf:resource="http://dbpedia.org/resource/Albert_Einstein" /> <dbpprop:influences rdf:resource="http://dbpedia.org/resource/Albert_Einstein" /> </rdf:Description> <rdf:Description rdf:about="http://dbpedia.org/resource/Nathan_Rosen"> <dbpedia-owl:academicAdvisor rdf:resource="http://dbpedia.org/resource/Albert_Einstein" /> <dbpprop:academicAdvisors rdf:resource="http://dbpedia.org/resource/Albert_Einstein" /> </rdf:Description> <rdf:Description rdf:about="http://dbpedia.org/resource/Einstein_%28disambiguation%29"> <dbpedia-owl:wikiPageDisambiguates rdf:resource="http://dbpedia.org/resource/Albert_Einstein" /> </rdf:Description>
dbpedia:Albert_Einstein rdfs:comment "Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history. He received the 1921 Nobel Prize in Physics \"for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect\"."@en , "Albert Einstein est un physicien th\u00E9oricien d'origine juive qui fut successivement allemand, puis apatride (1896), suisse (1901), et enfin helv\u00E9tico-am\u00E9ricain (1940). Il publie sa th\u00E9orie de la relativit\u00E9 restreinte en 1905, et une th\u00E9orie de la gravitation dite relativit\u00E9 g\u00E9n\u00E9rale en 1915. Il contribue largement au d\u00E9veloppement de la m\u00E9canique quantique et de la cosmologie, et re\u00E7oit le prix Nobel de physique de 1921 pour son explication de l\u2019effet photo\u00E9lectrique."@fr .
303 See Other Connection: close Date: Sat, 07 Jul 2012 10:03:27 GMT Accept-Ranges: bytes Location: http://dbpedia.org/page/Albert_Einstein Server: Virtuoso/06.04.3132 (Linux) x86_64-generic-linux-glibc25-64 VDB Content-Length: 0 …
Public sector holds a lot of data:
Most Open Government Data released as CSV (source)
Most apps are Web based and visualise a single static dataset.
Approximately 90% of the apps surveyed combine OGD with maps, mainly Google Maps and Open Street Map.
Lots of challenges remain (write up):
★ | Available on the web (whatever format) but with an open licence, to be Open Data |
★★ | Available as machine-readable structured data (e.g. excel instead of image scan of a table) |
★★★ | as (2) plus non-proprietary format (e.g. CSV instead of excel) |
★★★★ | All the above plus, Use open standards from W3C (RDF and SPARQL) to identify things, so that people can point at your stuff |
★★★★★ | All the above, plus: Link your data to other people’s data to provide context |
Originally developed by Tim Berners-Lee