<ul><li>SCOVO:  </li></ul><ul><li>Using Statistics on the Web of Data </li></ul><ul><li>Michael Hausenblas, Wolfgang Halb,...
Agenda <ul><li>SCOVO Motivation </li></ul><ul><li>Requirements and Issues </li></ul><ul><li>Statistical Modelling Framewor...
Motivation <ul><li>SCOVO:  S tatistical  Co re  Vo cabulary http://sw.joanneum.at/scovo   </li></ul><ul><li>Statistical da...
Motivation <ul><li>Web of Data is for sharing, accessing and using  DATA </li></ul><ul><li>SCOVO aims at making statistica...
Motivation <ul><li>Based on 3 distinct efforts </li></ul><ul><li>r iese  –  ‚RDFizing and Interlinking the EuroStat Data S...
Issues <ul><li>Handling of Multiple Dimensions </li></ul><ul><li>Reusability and Uptake </li></ul><ul><li>Structural vs. D...
Requirements <ul><li>Usable on the Web of Data (URIs, RDF, etc.) </li></ul><ul><li>Extensible both on schema level and ins...
Statistical Modelling Framework
SCOVO http://purl.org/NET/scovo
Comparison
Example <ul><li>From  http://purl.org/NET/scovo   </li></ul><ul><ul><li>SELECT ?airport_name ?period ?percent_ontime_arriv...
Usage: riese <ul><li>R DFizing and  I nterlinking the  E urostat data  S et  E ffort </li></ul><ul><li>http://riese.joanne...
Usage: voiD <ul><li>voiD – Vocabulary of Interlinked Datasets http://semanticweb.org/wiki/VoiD   </li></ul><ul><li>Formal ...
Usage: RDFStats http://semwiq.faw.uni- linz.ac.at/node/9
Conclusion <ul><li>Modeling statistics is a non-trivial task (wide range of requirements, etc.) </li></ul><ul><li>SCOVO is...
<ul><li>Let‘s discuss! </li></ul>
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ESWC 2009 In-Use Track: SCOVO

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http://www.eswc2009.org/program-menu/accepted-in-use-track-papers/130-michael-hausenblas-wolfgang-halb-yves-raimond-lee-feigenbaum-and-danny-ayers-scovo-using-statistics-on-the-web-of-data

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ESWC 2009 In-Use Track: SCOVO

  1. 1. <ul><li>SCOVO: </li></ul><ul><li>Using Statistics on the Web of Data </li></ul><ul><li>Michael Hausenblas, Wolfgang Halb, Yves Raimond, Lee Feigenbaum, Danny Ayers </li></ul><ul><li>ESWC2009 In-Use Track, 2009-05-04, Heraklion, Greece </li></ul>
  2. 2. Agenda <ul><li>SCOVO Motivation </li></ul><ul><li>Requirements and Issues </li></ul><ul><li>Statistical Modelling Framework </li></ul><ul><li>Comparison </li></ul><ul><li>Usage </li></ul>
  3. 3. Motivation <ul><li>SCOVO: S tatistical Co re Vo cabulary http://sw.joanneum.at/scovo </li></ul><ul><li>Statistical data is present everywhere </li></ul>
  4. 4. Motivation <ul><li>Web of Data is for sharing, accessing and using DATA </li></ul><ul><li>SCOVO aims at making statistical data easier and better accessible on the Web of Data </li></ul>
  5. 5. Motivation <ul><li>Based on 3 distinct efforts </li></ul><ul><li>r iese – ‚RDFizing and Interlinking the EuroStat Data Set Effort‘ </li></ul><ul><ul><li>http://riese.joanneum.at </li></ul></ul><ul><ul><li>Eurostat data (official European statistics) </li></ul></ul><ul><li>US Census Bureau‘s annual Statistical Abstract </li></ul><ul><li>Publishing UN and OECD </li></ul><ul><ul><li>http://oecd.dataincubator.org/ </li></ul></ul>
  6. 6. Issues <ul><li>Handling of Multiple Dimensions </li></ul><ul><li>Reusability and Uptake </li></ul><ul><li>Structural vs. Domain Semantics </li></ul><ul><li>Performance and Scalability Issues </li></ul>
  7. 7. Requirements <ul><li>Usable on the Web of Data (URIs, RDF, etc.) </li></ul><ul><li>Extensible both on schema level and instance level </li></ul><ul><li>Light-weight, addressing uptake, and performance and scalability issues. </li></ul>
  8. 8. Statistical Modelling Framework
  9. 9. SCOVO http://purl.org/NET/scovo
  10. 10. Comparison
  11. 11. Example <ul><li>From http://purl.org/NET/scovo </li></ul><ul><ul><li>SELECT ?airport_name ?period ?percent_ontime_arrivals </li></ul></ul><ul><ul><li>FROM <http://sw.joanneum.at/scovo/otf-example-full.rdf> </li></ul></ul><ul><ul><li>WHERE { </li></ul></ul><ul><ul><li>?item rdf:type scv:Item ; </li></ul></ul><ul><ul><li>scv:dimension ?airport; </li></ul></ul><ul><ul><li>scv:dimension ?time_period; </li></ul></ul><ul><ul><li>scv:dimension ex:ota ; </li></ul></ul><ul><ul><li>rdf:value ?percent_ontime_arrivals . </li></ul></ul><ul><ul><li>?airport rdf:type ex:Airport ; </li></ul></ul><ul><ul><li>dc:title ?airport_name . </li></ul></ul><ul><ul><li>?time_period rdf:type ex:TimePeriod ; </li></ul></ul><ul><ul><li>scv:min ?min ; </li></ul></ul><ul><ul><li>scv:max ?max ; </li></ul></ul><ul><ul><li>dc:title ?period . </li></ul></ul><ul><ul><li>FILTER ( ?min > &quot;2006-02-01&quot; && ?max < &quot;2006-08-01&quot;) </li></ul></ul><ul><ul><li>} </li></ul></ul>
  12. 12. Usage: riese <ul><li>R DFizing and I nterlinking the E urostat data S et E ffort </li></ul><ul><li>http://riese.joanneum.at </li></ul><ul><li>Contributing to Linking Open Data project </li></ul><ul><li>Offers linked data version of Eurostat data </li></ul><ul><li>for both humans and machines (first LOD-in-RDFa dataset in the cloud) </li></ul>
  13. 13. Usage: voiD <ul><li>voiD – Vocabulary of Interlinked Datasets http://semanticweb.org/wiki/VoiD </li></ul><ul><li>Formal description of linked datasets </li></ul><ul><li>Uses SCOVO to express stats about triples, interlinking, resources, etc. </li></ul>
  14. 14. Usage: RDFStats http://semwiq.faw.uni- linz.ac.at/node/9
  15. 15. Conclusion <ul><li>Modeling statistics is a non-trivial task (wide range of requirements, etc.) </li></ul><ul><li>SCOVO is usable, generic, simple </li></ul><ul><li>However, there are issue: </li></ul><ul><ul><li>Aggregation </li></ul></ul><ul><ul><li>Domain semantics </li></ul></ul>
  16. 16. <ul><li>Let‘s discuss! </li></ul>

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