[ckan-discuss] Convention for recording data "quality" information

[Tim McNamara]

Great idea.

It would be good to be able to have a measure of quality for the description
field. But, I can't think an easy way for a machine to do this
automatically..

On 14 July 2011 13:20, Rufus Pollock <rufus.pollock at okfn.org> wrote:

> Hi All,
>
> We're doing work at the moment to do some quality assurance (QA)
> processing on datasets e.g. does this resource exist (i.e. not 404),
> is the API up [1], does it conform to a schema (if it has a schema)
> ... (see also this original blog post by Stefan Urbanek [2])
>
> [1]: http://labs.mondeca.com/sparqlEndpointsStatus/index.html
> [2]: http://ckan.org/2011/01/20/data-quality-what-is-it/
>
> Leaving aside the exact process by which that happens one question is
> how and where to record the resulting info. Here's a straw-man
> proposal. Interested in feedback, ideas based on previous experience
> etc. A summary and the basic proposal has also been posted here:
>
> <http://wiki.ckan.net/Data_Quality>
>
> Regards,
>
> Rufus
>
> ## Proposal
>
> * Record info on the resource object metadata (Resources can have
> *arbitrary* metadata)
>
> * Field named 'qa'.
>
> * Structure of 'qa' field:
>
>  * last_checked: timestamp of last checked time
>  * status_code: html status code
>  * uptime: hash/dict keyed by period with uptime percentage
>  * validatiion: tbd (need to specific error info)
>  * fivestar: 5 star rating
>  * historical: array with historical versions of all of these
>
> Issues:
>
> * What about historical information. E.g. for sparql status checker
> [1] there is info from several weeks. If just summary info (e.g.
> uptime over last month / year) then not too bad but if daily status
> then how do we store.
>
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