Unique Unambiguous Identifiers for Semantic Web

Fariz Dararimrlogix

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What They Look Like

@mrlogix

http://dbpedia.org/resource/New_York_City

http://data.nytimes.com/N46020133052049607171

http://rdf.freebase.com/ns/en.new_york

http://sws.geonames.org/5128581/

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What They Identify*

@mrlogix

http://dbpedia.org/resource/New_York_City

http://sws.geonames.org/5128581/http://data.nytimes.com/N46020133052049607171

http://rdf.freebase.com/ns/en.new_york

*Hence unique as on title slide. See also this slide by TBL.

4

Technically, these things are called URIs:

@mrlogix

http://dbpedia.org/resource/New_York_City

http://data.nytimes.com/N46020133052049607171

http://rdf.freebase.com/ns/en.new_york

http://sws.geonames.org/5128581/

Then, what is a URI?

A Uniform Resource Identifier (URI) is a compact sequence of charactersthat identifies an abstract or physical resource.

Tim Berners-Lee (W3C)

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So, URIs are used to identify.

Therefore, it is perfectly fine if we could not retrieve the New York City by accessing some URI of the city, say, http://dbpedia.org/resource/New_York_City

@mrlogix

Definition of identify - byto serve as a means of identification for

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Instead, what we’d get is a description about the New York City by DBpedia:

@mrlogix

So, URIs are used to identify..

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Or in format:

@mrlogix

So, URIs are used to identify...

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More Examples of URIs

@mrlogix

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Congrats!You just learned about URIs that are used in

all the four basic principles of Semantic Web:

Source

@mrlogix

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Congrats!!You just learned about URIs that are used in

the Semantic Web Cake:

@mrlogixSee real picture here

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Credits• URI Definition http://tools.ietf.org/html/rfc3986• 4 Basic Principles of Semantic Web (aka. Linked Data) http://dig.csail.mit.edu/2007/Talks/0108-swuri-tbl • URIs Examples http://linkeddatabook.com/editions/1.0/ • URIs for Semantic Web http://www.med.nyu.edu/research/pdf/mainim01-1484312.pdf • SW Levels http://www.w3.org/2001/12/semweb-fin/swlevels.png

@mrlogix

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Credits (Images)• CC-BY Icon

http://upload.wikimedia.org/wikipedia/commons/thumb/1/16/CC-BY_icon.svg/120px-CC-BY_icon.svg.png• Twitter Icon http://www.iconfinder.com/icondetails/82332/128/twitter_icon • Barcode Icon http://www.iconfinder.com/icondetails/40683/128/barcode_icon • SW Icon http://www.w3.org/Icons/SW/sw-cube.png • NYC Photo

http://th03.deviantart.net/fs71/PRE/f/2011/074/7/3/new_york_city_wallpaper_by_angelmaker666-d3boylj.jpg

• Child Photo http://www.deankwilson.com/Blog_images/questioning_child_face_left.jpg • TBL Photo http://mp.blogs.com/.a/6a00d83451d22169e20112796bd8f428a4-200wi• Hand Icon http://www.iconfinder.com/icondetails/85401/128/thumb_up_icon • RDF Icon http://www.w3.org/Icons/SW/Buttons/sw-rdf-blue.png • SW Cake http://farm3.staticflickr.com/2280/2366732985_62f63e4179_z.jpg • Reading Robot http://

www.sri.com/sites/default/files/imagecache/slide_home_main/project/slides/faust_mp_010712_490x356.jpg

@mrlogix