The RDF Report Card: Beyond the Triple Count
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The RDF report card emphasizes that triple counts do not reflect the quality or utility of data. It advocates for a detailed presentation of data quality and encourages data publishing platforms to support better summaries. The concept of 'progressive disclosure' is introduced, which entails providing the right level of detail when needed.
The RDF Report Card: Beyond the Triple Count
- 1. The RDF Report Card Beyond the Triple Count 26th September 2011 SemTechBiz 2011 Leigh Dodds @ldodds http://kasabi.com http://slideshare.net/ldodds
- 2. Triple counts tell us nothing
- 3. Triple counts are not a quality indicator
- 5. 6 triples for Population Density Property Count Value http://dbpedia.org/ontology/PopulatedPlace/populationDensity 2 4807.0 4806.971873853451 http://dbpedia.org/ontology/populationDensity 2 4806.971874 4807.000000 http://dbpedia.org/property/populationDensityKm 1 4807 http://dbpedia.org/property/populationDensitySqMi 1 12450
- 6. 12 triples for Location (1) Property Count Value georss:point 1 51.507222222222225 -0.1275 geo:geometry 1 POINT(-0.1275 51.5072) geo:lat 1 51.507221 geo:long 1 -0.127500
- 7. 12 triples for Location (2) Property Count Value dbpprop:latd 1 51 dbpprop:latm 1 30 dbpprop:lats 1 26 dbpprop:latns 1 N dbpprop:longd 1 0 dbpprop:longm 1 7 dbpprop:longs 1 39 dbpprop:longew 1 W
- 9. Triple counts don't indicate utility
- 10. http://bbc.co.uk/programmes 2.5 million unique users per week, 60 req/s * * http://www.guardian.co.uk/media/pda/2011/apr/06/bbc-yves-raimond
- 11. http://bbc.co.uk/programmes Dataset is less than 50 million triples
- 12. Beyond the Triple Count
- 13. Dataset Information Spectrum Low Detail High Detail Summary and overview Detailed data model of dataset content documentation & guides
- 14. Dataset Information Spectrum Low Detail High Detail Summary and overview Detailed data model of dataset content documentation & guides More Information
- 15. Dataset Information Spectrum Low Detail High Detail Metadata ● Title, Description ● Provenance ● Publication dates ● Licensing ● Usage cues ● Related datasets
- 16. Dataset Information Spectrum Low Detail High Detail Scope ● What types of entity? ● How many of each type? ● Coverage ● Geographic ● Events (time)
- 17. Dataset Information Spectrum Low Detail High Detail Structure ● URI Scheme ● Vocabulary meshing ● How is a person described?
- 18. Dataset Information Spectrum Low Detail High Detail Internals ● List of Schemas & RDF terms ● Class/property usage counts ● Triple counts ● Named graph structure ● Source files
- 19. RDF Report Card Example
- 20. Summarising Content of a Dataset ● Find all classes in all datasets in Kasabi ● Tag each class against a pre-defined set of categories ● Customized version of top-level schema.org classes ● Generate a report card for each dataset listing types of entity
- 26. Summary ● Triple counts tell us nothing ● Vital to present the quality & utility of our data ● Data publishing platforms should support this ● "Progressive disclosure" ● Right detail at the right time ● Dataset analysis can generate useful summaries ● e.g. an RDF report card