linked data 1 : hva og hvorfor [email protected] kog31 uke 6, 2011
DESCRIPTION
Linked Data 1 : Hva og hvorfor [email protected] KoG31 Uke 6, 2011. Metadata is King!. Objekt Egenskap Verdi. Hvorfor?. Identifiserer. Gjenfinner. Bruker. Vi velger egenskaper etter objektet vi skal beskriver og hva beskrivelsen skal brukes til. Metadata semantikk - PowerPoint PPT PresentationTRANSCRIPT
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Metadata is
King!
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Objekt
Egenskap
Verdi
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Hvorfor?
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Identifiserer
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Gjenfinner
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Bruker
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Vi velger egenskaper etter objektet vi skal beskriver og hva beskrivelsen skal brukes til
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Metadata semantikk
Hva betyr Tittel?
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Metadata struktur
Må Tittel være med?
Kan vi gjenta Tittel?
Hvordan skal verdien for Tittel utformes?
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Metadata syntaks
Hvordan skal Tittel nedtegnes?
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Syntaks
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Syntaks
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Syntaks
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Standards are also Kings!
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Kommunikasjon
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Datamaskiner kommuniserer vha Internett – slutten 1960-tallet
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Men hva skulle Internett brukes til?
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Cern, Sveits – 1990 – Tim Berners-Lee
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Utveksling av dokumenter
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Dokumenter + lenker
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U2
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<band>U2</band>
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<plane>U2</plane>
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HTML
Beskriver struktur i dokumenter
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<h1> Hovedoverskrift
<p> Avsnitt
<ul> Usortert liste
<li> Listepunkt
<table> Tabell
<tr> Rad i en tabell
<td> Datacelle i en tabell
…
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http://en.wikipedia.org/wiki/Norway
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<table>
…
<tr>
<th>Population</th>
</tr>
<tr>
<td>2011 estimate</td>
<td>4,936,000 (116th)</td>
</tr>
…
</table>
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Linked data
Beskriver objekter med egenskaper og verdier
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<rdf:Description rdf:about="http://dbpedia.org/resource/Norway"><dbpprop:populationEstimate>4,936,000</dbpprop:populationEstimate></rdf:Description>
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Dokument Data
table Description
tr about
th populationEstimate
td
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Dokumenter er for menneske, data er for datamaskiner
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Hvorfor?
”We need to help machines to understand the web so machines can help us understand things.”
Raimond og Smethurst, BBC, 2009
(http://www.bbc.co.uk/blogs/radiolabs/s5/linked-data/s5.html)
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Semantisk Web
”I have a dream for the Web [in which computers] become capable of analyzing all the data on the Web – the content, links, and transactions between people and computers. A ‘Semantic Web’, which should make this possible, has yet to emerge, but when it does, the day-to-day mechanisms of trade, bureaucracy and our daily lives will be handled by machines talking to machines. The ‘intelligent agents’ people have touted for ages will finally materialize."
Tim Berners-Lee, Scientific American, 2001
(http://www.scientificamerican.com/article.cfm?id=the-semantic-web)
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Science Fiction?
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Men, hva har dette med bibliotek å gjøre?
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Siloer
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"Nobody else frets over whether Google 'wants' their data. They just put it on the real web, not on some bullshit mid-90s dark web."
Tim Spalding, Skaperen av LibraryThing, 2009
(http://serials.infomotions.com/ngc4lib/archive/2009/200910/1678.html)
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"The coolest thing to do with your data will be thought of by someone else."
Rufus Pollock
(http://blog.paulwalk.net/2007/07/23/%E2%80%9Cthe-coolest-thing-to-do-with-your-data-will-be-thought-of-by-someone-else%E2%80%9D/)
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http://bokelskere.no/
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Neste gang: Linked data 2 : Hvordan
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Flickr fotoer:Lego 713Avenue (http://www.flickr.com/photos/seven13avenue/)King Gruhn (http://www.flickr.com/photos/gruhn/)Record Olivander (http://www.flickr.com/photos/olivander/)Katalog mightymightymatze (http://www.flickr.com/photos/mightymightymatze/)Vinyl Steve Snodgrass http://www.flickr.com/photos/stevensnodgrass/Spotify Dekuwa http://www.flickr.com/photos/dekuwa/Ikea Dougbelshaw http://www.flickr.com/photos/dougbelshaw/Catalog card - Circulating - http://www.flickr.com/photos/circulating/MARC - Xmacex - http://www.flickr.com/photos/xmacex/XML - Will Pate - http://www.flickr.com/photos/willpate/Plugs - Keith Williamson - http://www.flickr.com/photos/elwillo/Bench - L.A. Nolan - http://www.flickr.com/photos/lanolan/Cables - Neil T. - http://www.flickr.com/photos/neilt/Computer screens - ecastro - http://www.flickr.com/photos/ecastro/TBL - campuspartybrasil - http://www.flickr.com/photos/campuspartybrasil/Post - F Photography - http://www.flickr.com/photos/21873449@N07/Girls - Jason Hudson - http://www.flickr.com/photos/jasonhudson/Robots - Don Solo - http://www.flickr.com/photos/donsolo/Castle - Wolfgang Staudt - http://www.flickr.com/photos/wolfgangstaudt/Lego City - Eirik Newth - http://www.flickr.com/photos/eiriknewth/