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Re: Define @type for all rows

From: Colin Maudry <colin@maudry.com>
Date: Mon, 14 Dec 2015 17:39:05 +0100
To: public-csv-wg@w3.org
Message-ID: <566EF0A9.9050403@maudry.com>
Answering my own question:

In the csv2rdf spec, Example 11 [1] uses a virtual column to generate
more triples:

{"name":"type_event","virtual":true,"aboutUrl":"#event-{_row}","propertyUrl":"rdf:type","valueUrl":"schema:MusicEvent"}

This says that:

- a virtual column is described (virtual: true)= not an actual column in
the table
- a name was made up (name: type_event)
- the URI of the subject of the triple is  #event-{_row}, using the
current @base to resolve to a full URI
- The predicate/property of the triple is rdf:type
- the object/value of the triple is schema:MusicEvent.

So for instance for row 1, a triple like that would be generated:

#event-1 rdf:type schema:Event .

...which is exactly what I was looking for! If there are alternate
solutions, please  speak up.

[1]
http://www.w3.org/TR/2015/CR-csv2rdf-20150716/#example-events-listing-metadata

Cheers,
Colin Maudry
@CMaudry

On 14/12/15 14:09, Colin Maudry wrote:
> Hello,
>
> In this JSON metadata file [1], I annotate this CSV [2] (8 MB) (also in
> JSON-LD playground [3]).
>
> I'm familiar with RDF, and would like to specify in my schema that every
> row in this table describes an object of @type
> <https://www.wikidata.org/wiki/Q1244442> ("school building").
>
> I think I saw somewhere that it was possible to specify this on a
> csvw:Row object, but since I only annotate the table and the columns and
> don't want to annotate every single row, that doesn't seem like a good
> approach in my case.
>
> What would you suggest? Did I miss something?
>
> [1]
> https://github.com/ColinMaudry/dgfr-tabular-metadata/blob/develop/etablissements-scolaires/depp-etablissements-premier-et-second-degres-structures-administratives-education-avril-2014.json
> [2]
> https://raw.githubusercontent.com/ColinMaudry/dgfr-tabular-metadata/develop/etablissements-scolaires/depp-etablissements-premier-et-second-degres-structures-administratives-education-avril-2014.csv
> [3] http://goo.gl/Yhm2yJ
>
> Colin Maudry
> @CMaudry
>
>
Received on Monday, 14 December 2015 16:39:34 UTC

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