ISSUE-222: Multiple/Derived values of a metric

Multiple/Derived values of a metric

State:
CLOSED
Product:
Quality & Granularity Vocabulary
Raised by:
Antoine Isaac
Opened on:
2015-12-06
Description:
Raised in public comment by Werner Bailer
https://lists.w3.org/Archives/Public/public-dwbp-comments/2015Oct/0019.html

[
a. multiple values of one metric

We found that there are metrics where a single output value may not be sufficient. In particular, this applies to statistics (which are listed as one dimension in the draft spec). For example, one may want to express the mean, min or max of a metric over a dataset, or providing an absolute and a relative (normalized) value for the same metric. Of course this could be done by defining multiple metrics, but then one would need a mechanism to group/link them or express their dependency.

In the EBU, the working group on quality control [2] has defined a data model for the somewhat related problem of describing quality of audiovisual content (with XML serialisations so far, not RDF). This model supports multiple output values, that can be typed. For DQV, this could for example be achieved by having multiple values, and defining subproperties of daq:value.


[2] https://tech.ebu.ch/groups/qc
]

After discussion with Andrea (Issue-202 [2]) and work on Quality Policy [3] we extend the scope of this issue to cater for relationships between quality policies and annotations and metrics.

[2] https://www.w3.org/2013/dwbp/track/issues/202
[3] http://w3c.github.io/dwbp/vocab-dqg.html#ExpressConformanceWithPolicy
Related Actions Items:
Related emails:
  1. Re: AW: Data Quality Vocabulary - Levels of granularity for dimensions and categories (from aisaac@few.vu.nl on 2016-04-28)
  2. Re: AW: Data Quality Vocabulary - Multiple/Derived values of a metric and Levels of granularity for dimensions and categories (from aisaac@few.vu.nl on 2016-04-28)
  3. Re: AW: Data Quality Vocabulary - Expected Data types (from aisaac@few.vu.nl on 2016-04-28)
  4. AW: Data Quality Vocabulary - Expected Data types (from werner.bailer@joanneum.at on 2016-04-19)
  5. AW: Data Quality Vocabulary - Levels of granularity for dimensions and categories (from werner.bailer@joanneum.at on 2016-04-19)
  6. AW: Data Quality Vocabulary - Multiple/Derived values of a metric and Levels of granularity for dimensions and categories (from werner.bailer@joanneum.at on 2016-04-19)
  7. Re: dwbp-ACTION-255: Create an example using prov:wasderivedfrom in the dqv, close issue-222 (from aisaac@few.vu.nl on 2016-04-14)
  8. Re: dwbp-ACTION-255: Create an example using prov:wasderivedfrom in the dqv, close issue-222 (from albertoni@ge.imati.cnr.it on 2016-04-14)
  9. Re: dwbp-ACTION-255: Create an example using prov:wasderivedfrom in the dqv, close issue-222 (from aisaac@few.vu.nl on 2016-04-13)
  10. Re: DQV, ISO 19115/19157 and GeoDCAT-AP - Issue-202 - representing conformance (from andrea.perego@jrc.ec.europa.eu on 2016-04-10)
  11. Re: DQV, ISO 19115/19157 and GeoDCAT-AP - Issue-202 - representing conformance (from aisaac@few.vu.nl on 2016-04-08)
  12. Re: dwbp-ACTION-255: Create an example using prov:wasderivedfrom in the dqv, close issue-222 (from albertoni@ge.imati.cnr.it on 2016-03-23)
  13. Re: dwbp-ACTION-255: Create an example using prov:wasderivedfrom in the dqv, close issue-222 (from aisaac@few.vu.nl on 2016-03-23)
  14. Re: dwbp-ACTION-255: Create an example using prov:wasderivedfrom in the dqv, close issue-222 (from albertoni@ge.imati.cnr.it on 2016-03-22)
  15. dwbp-ACTION-255: Create an example using prov:wasderivedfrom in the dqv, close issue-222 (from sysbot+tracker@w3.org on 2016-03-14)
  16. Re: DQV, ISO 19115/19157 and GeoDCAT-AP - Issue-202 - representing conformance (from aisaac@few.vu.nl on 2016-03-10)
  17. Re: Data Quality Vocabulary - Expected Data types (from aisaac@few.vu.nl on 2016-03-06)
  18. Re: Data Quality Vocabulary - Expected Data types (from aisaac@few.vu.nl on 2016-03-06)
  19. Re: Data Quality Vocabulary - Levels of granularity for dimensions and categories (from aisaac@few.vu.nl on 2016-03-06)
  20. Re: Data Quality Vocabulary - Multiple/Derived values of a metric and Levels of granularity for dimensions and categories (from aisaac@few.vu.nl on 2016-03-06)
  21. Re: some thoughts on https://www.w3.org/2013/dwbp/track/issues/222 (from aisaac@few.vu.nl on 2016-03-06)
  22. some thoughts on https://www.w3.org/2013/dwbp/track/issues/222 (from albertoni@ge.imati.cnr.it on 2016-02-17)
  23. Re: dwbp-ISSUE-222: Multiple/Derived values of a metric [Quality & Granularity Vocabulary] (from amgreiner@lbl.gov on 2015-12-07)
  24. AW: Data Quality Vocabulary - feedback welcome! (from werner.bailer@joanneum.at on 2015-12-07)
  25. Re: Data Quality Vocabulary - feedback welcome! (from aisaac@few.vu.nl on 2015-12-06)
  26. dwbp-ISSUE-222: Multiple/Derived values of a metric [Quality & Granularity Vocabulary] (from sysbot+tracker@w3.org on 2015-12-06)

Related notes:

Reaction from Jeremy
https://lists.w3.org/Archives/Public/public-dwbp-comments/2015Nov/0000.html

[
In theory, there is only one value for a metric - others are derivatives. With a daq:Observation, such derivatives should be easily defined by creating external data cube measure property.
]

Antoine Isaac, 6 Dec 2015, 16:40:28

Resolved [https://www.w3.org/2016/03/14-dwbp-minutes]

[
As part of the resolution for this issue is to rese the generic relation prov dervied from
... If we have identified that one metric can be derived from another, quality annotation can be derived from a metric etc.
... So we're thinking about a general derivation framework
... People can use it as they see fit.
... Can't predict all the scenarios

ACTION: riccardoAlbertoni to create an example using prov:wasDerivedFrom in the DQV, close issue-222 [recorded in http://www.w3.org/2016/03/14-dwbp-minutes.html#action12]

https://www.w3.org/2013/dwbp/track/actions/225
]

Antoine Isaac, 16 Mar 2016, 13:01:12

It's ACTION-255 not ACTION-225
https://www.w3.org/2013/dwbp/track/actions/255

Antoine Isaac, 22 Mar 2016, 07:17:27

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