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Sebastian Hellmann: Why open data should be open linked data
 

Sebastian Hellmann: Why open data should be open linked data

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Sebastian Hellman's (Universität Leipzig) presentation at Prague Open Data Meetup #7: Linked Open Cities. ...

Sebastian Hellman's (Universität Leipzig) presentation at Prague Open Data Meetup #7: Linked Open Cities.

The event was organised by Otakar Motejl Fund and LOD2 project. More info: bit.ly/open-cities-meetup

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    Sebastian Hellmann: Why open data should be open linked data Sebastian Hellmann: Why open data should be open linked data Presentation Transcript

    • Open Data Prague – 2013/10/10 – Page 1 http://lod2.eu Creating Knowledge out of Interlinked Data LOD2 Presentation . 02.09.2010 . Page http://lod2.eu AKSW, Universität Leipzig Sebastian Hellmann Why Open Data should be Open Linked Data? http://lod2.eu http://slideshare.net/kurzum
    • Open Data Prague – 2013/10/10 – Page 2 http://lod2.eu 1. Terminology → Open Linked Data vs. Linked Open Data 2. Level Up → breaking it down 3. Perspectives → solutions / approaches Overview
    • Open Data Prague – 2013/10/10 – Page 3 http://lod2.eu 1. Terminology Open Data → data that is open (more on the next slide) Linked Data → a standardized technology by W3C (based on RDF) to publish and interlink data on the web Linked Open Data vs. Open Linked Data → mixture Overview
    • Open Data Prague – 2013/10/10 – Page 4 http://lod2.eu 1. Terminology Open Data → data that is open (more on the next slide) Linked Data → a standardized technology by W3C (based on RDF) to publish and interlink data on the web Linked Open Data vs. Open Linked Data → mixture Overview This talk is about Open Linked Data: Open Data using Linked Data technology
    • Open Data Prague – 2013/10/10 – Page 5 http://lod2.eu http://lod-cloud.net LOD Cloud
    • Open Data Prague – 2013/10/10 – Page 6 http://lod2.eu http://lod-cloud.net LOD Cloud Linked Open Data - All datasets provide open access to individual records via HTTP - Many are free (no payment required, as in royalty-free) - Some are openly licensed, e.g. CC-0 or CC-BY-SA => Open access also applies to published HTML on the WWW, but in LOD the data itself is published via Linked Data
    • Open Data Prague – 2013/10/10 – Page 7 http://lod2.eu http://lod-cloud.net DBpedia: http://dbpedia.org/resource/Prague → http://rdf.freebase.com/ns/m.05ywg → http://sws.geonames.org/3067696/ → http://linkedgeodata.org/triplify/node262709
    • Open Data Prague – 2013/10/10 – Page 8 http://lod2.eu Level up Public Data Infrastructure
    • Open Data Prague – 2013/10/10 – Page 9 http://lod2.eu Public infrastructure: ● Brick and mortar: → Roads, electricity, water, sewage ● Public services: → child care, libraries, schools ● Economic services: → social security, currency, economic stability ● Data infrastructure: → ??? Public infrastructure
    • Open Data Prague – 2013/10/10 – Page 10 http://lod2.eu Public infrastructure: ● Brick and mortar: → Roads, electricity, water, sewage ● Public services: → child care, libraries, schools ● Economic services: → social security, currency, economic stability ● Data infrastructure: → ??? Public infrastructure Not clearly defined yet, but like roads, it should provide a vital benefit for citizens and companies
    • Open Data Prague – 2013/10/10 – Page 11 http://lod2.eu Public infrastructure Open Data Strategy (Ref: IP/11/1524) expected to deliver €40 billion boost to the EU's economy each year Data becomes a tradable commodity, “the value of data increases the more you share it” ©Nigel Holmes 2012 / from The Human Face of Big Data
    • Open Data Prague – 2013/10/10 – Page 12 http://lod2.eu • Public transportation data is highly usefull • Travel companies currently can not plan point-to-point • At each level (city, country, airplanes) different visualizations are used (most not very good ones) • Public data infrastructure example
    • Open Data Prague – 2013/10/10 – Page 13 http://lod2.eu What is the current state of your local public data infrastructure? ● List of street names with geo-coordinates and zip codes ● List of companies in your area ● Electricity usage ● Pollution measurements ● Weather data Public data infrastructure
    • Open Data Prague – 2013/10/10 – Page 14 http://lod2.eu What is the current state of your local public data infrastructure? ● List of street names with geo-coordinates and zip codes ● List of companies in your area ● Electricity usage ● Pollution measurements ● Weather data Public data infrastructure Measurement: - How easy can you get high quality data? - Are the roads built or do you have to built them yourself?
    • Open Data Prague – 2013/10/10 – Page 15 http://lod2.eu Power-Up 1: Open access to data Cost factor 1: - Can I download the data? - Do I have to scrape it? - scraping HTML / PDF / RTF / Word quite work intensive
    • Open Data Prague – 2013/10/10 – Page 16 http://lod2.eu Power-Up 1: Open access to data No open access → no benefit for data consumers → no mushroom
    • Open Data Prague – 2013/10/10 – Page 17 http://lod2.eu Power-Up 2: Open data Open Data is the enabler to share the cost of data integration
    • Open Data Prague – 2013/10/10 – Page 18 http://lod2.eu • Level 2 data: • Downloadable + re-publishable • Anybody can add value • Obviously a great infrastructure for an economy Public data infrastructure example
    • Open Data Prague – 2013/10/10 – Page 19 http://lod2.eu Standardization and best practices keep our society efficient and effective: ● Driving on the right side of the road ● Cell phone chargers ● Distance of railway tracks Power-Up 3: Linked Data
    • Open Data Prague – 2013/10/10 – Page 20 http://lod2.eu Power-Up 3: Linked Data <kindergarten> <name>Seven Dwarfs</name> <location>...</location> <description>...</description> </kindergarten> <child_care name=„Seven Dwarfs“> <address> <street>...</street> <zip>...</zip> </address> <text>...</text> </child_care> <daycare id=„Seven Dwarfs“ address=„...“> . . . </ daycare > Syntactic heterogenity – different trees Semantic heterogenity – different tags and attributes (e.g. kindergarten, child_care, daycare)
    • Open Data Prague – 2013/10/10 – Page 21 http://lod2.eu Power-Up 3: Linked Data
    • Open Data Prague – 2013/10/10 – Page 22 http://lod2.eu Power-Up 3: Linked Data Linked Data assists third party efforts via → standardization → best practices
    • Open Data Prague – 2013/10/10 – Page 23 http://lod2.eu Take home messages: Linked Data assists third party efforts via → standardization → best practices Open Data is the enabler to share the cost of data integration No open access → no benefit for data consumers → no mushroom
    • Open Data Prague – 2013/10/10 – Page 24 http://lod2.eu What is the current state of your local public data infrastructure? Summary How easy can you get high quality data? - Open Access of structured data - Open licenses - Standardized formats (e.g. Linked Data or RDF)
    • Open Data Prague – 2013/10/10 – Page 25 http://lod2.eu Public data infrastructure
    • Open Data Prague – 2013/10/10 – Page 26 http://lod2.eu Public data infrastructure
    • Open Data Prague – 2013/10/10 – Page 27 http://lod2.eu Open Community – All feedback is welcome! http://slideshare.net/kurzum Websites: http://lod2.eu Thanks for your attention