Re: Creating mappings for RDF/JSON based on values of multiple columns

Hm. To be honest, I do not really see a way through the direct mapping, unfortunately.:-( 

Ivan

On 08 Oct 2014, at 11:35 , Tandy, Jeremy <jeremy.tandy@metoffice.gov.uk> wrote:

> Hi - 
> 
> Based on the [historical weather observations example][1] I am working on, I've come across a difficulty.
> 
> The CSV has two columns `yyyy` and `mm` representing year and month relating to a given monthly observation record; e.g. 
> 
> ```
> yyyy,mm,tmax,,tmin,,af,,rain,,sun,,
> 1978,9,17.5,,11.3,,0,,26.7,,---,,
> 1978,10,15.6,,10.7,,0,,20.4,,---,,
> ```
> 
> I want to map the values of `yyyy` and `mm` into a single target; in this case an object representing the target month (expressed using the scheme from reference.gov.uk), e.g.
> 
> ```
> _:b1 sdmx:refPeriod <http://reference.data.gov.uk/id/gregorian-interval/1978-09-01T00:00:00/P1M> .
> ```
> 
> I don't want to create triples for the `yyyy` and `mm` properties at all - only the aggregated property for `sdmx:refPeriod`.
> 
> (this overlaps a little with [Dan's email about RML capabilities][2] ... in my case I am trying to steer clear of external templating).
> 
> Any ideas?
> 
> Thanks, Jeremy
> 
> 
> 
> [1]: https://github.com/w3c/csvw/tree/gh-pages/experiments/historical-weather-observation-dataset 
> [2]: http://lists.w3.org/Archives/Public/public-csv-wg/2014Oct/0015.html 
> 


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Ivan Herman, W3C 
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