“IT’S THE DATA STUPID..!”

LIEKE.VERHELST@WUR.NLWAGENINGEN UNIVERSITY AND RESEARCH CENTRE

WHAT IS OPEN DATA?Is a webservice Open Data?

• W3C “The Web services architecture is an interoperability architecture”

©esri.com

WHAT IS OPEN DATA?Is an API Open Data?

• Wikipedia: “An application programming interface (API) is a particular set of rules ('code') and specifications that software programs can follow to communicate with each other. It serves as an interface between different software programs”

www 20 years!

OPEN..OPENER...!

April 2011

★ Available with open license

★★ Machine readable

★★★ Machine readable without proprietary format

★★★★ URI’s for reference

★★★★★ Link your data to other data

FROM WWW..TO WEB OF DATA

★ AVAILABLE WITH OPEN LICENSE

Source: http://lab.linkeddata.deri.ie/2010/star-scheme-by-example/

★★ MACHINE READABLE

Source: http://lab.linkeddata.deri.ie/2010/star-scheme-by-example/

★★★ MACHINE READABLE WITHOUT PROPRIETARY FORMAT

"Temperature forecast for Galway, Ireland",

"Day","Lowest Temperature (C)""Saturday, 13 November 2010",2"Sunday, 14 November 2010",4"Monday, 15 November 2010",7

Source: http://lab.linkeddata.deri.ie/2010/star-scheme-by-example/

SO...API and web service are max ★★★ open data according to Tim Berners-Lee..But ..limited access to data itselfUhh..does it matter..?

HOW ..

RELATIONAL DATASTRUCTURE

NETWORK DATASTRUCTURE(SEMANTIC WEB)

1

2

1

3

2

3 triples (triple store)

Publication

Organisation

Author

Research Area

Title

writtenBy

hasTitle

worksFor

hasResearchAreaPlants

studyObject

“Trace elements in soils and plants”

Book187625

Bunte, F

Ornamentals

Bougainvillea

Wageningen UR

Book187626

“Reduced VAT rates for flowers and plants : situation 2010"

Kabata-Pendias, A.

Aconitum

Plant Composition

Philips

Country

growsIn Italy

China

Carex flacca

The Netherlands

Iceland

France

Utrecht University

Linked Data (triples)

LINKED DATA (3D)

DATA WEB ARCHITECTUREData storage via XML (RDF) network data structure Every element has unique ID (URI)HTTP transport protocol -> linkable URLs

1. http://library.wur.nl/publications/Book1876252. http://library.wur.nl/writtenBy3. http://library.wur.nl/authors/BunteF

LINKED DATA

Linked Data is here!

http://www.bbc.co.uk/blogs/bbcinternet/2010/07/bbc_world_cup_2010_dynamic_sem.html

..if Author worksFor Organisation ofType University thenAuthor hasProfession Academic

Lieke

WURUniversity

Academic

INTELLIGENT WEB

inferred: Lieke hasProfession Academic

MY PROJECTS

Linked data analysis & reasoningLinked data demonstratorWUR library: authors and publications Linked Open Data

Soon:With Geonovum: Geo Linked Open Data

Thank You AttentionforYour