[ckan-dev] Recent DCAT/RDF work on ckanext-dcat

Thu Oct 30 16:10:49 UTC 2014

Thank you Adrià,

This is very good news! DCAT improvement was part of the important stuff
from my point of view (in the Trello board).

There is an extension to also support data.json format, which is a DCAT
JSON serialization (I don't know how close it is from spec on
datacatalogs.org) and there's also an CKAN extension to support data.json.
Do you know if there was a look to integrate data.json (both to parse and
produce) in the dcat extension?

***

As a side note: as a member of the open data working group of the OGP, Open
North is working (with some folks at the US GSA) on best practice in terms
of open data standardization (from encoding to data formats, and everything
that make open data more accessible). For the moment, we are at the step of
inventory of practice so clearly everything around DCAT and other metadata
format is of interest for us.

Cheers

Stéphane

On Thu, Oct 30, 2014 at 11:30 AM, Adrià Mercader <adria.mercader at okfn.org>
wrote:

> Hi all,
>
> I just wanted to point people interested in DCAT and more generally
> RDF + CKAN to some recent work that has been done in ckanext-dcat.
>
> To give some context, a while ago we propose a simple spec [2] for
> sharing metadata across catalogs based on DCAT terms. This provided a
> specific serialization format that catalog owners could implement on
> JSON or XML, and that is supported by ckanext-dcat to import metadata
> from other catalogs.
>
> We still think that this spec is useful for publishers that don't want
> or can't go through the process of publishing proper semantic
> descriptions of the catalog records in RDF. But is also true that
> restricts the possibilities of interacting with other catalogs that
> are publishing their metadata in various RDF formats and
> serializations, commonly under a certain DCAT Application Profile.
>
> In that regard, ckanext-dcat now offers a generic RDF based parser and
> harvester that allows importing DCAT-based RDF in different
> serialization formats and create/update/delete CKAN datasets
> accordingly.
>
> From the updated README:
>
> "In terms of CKAN, this extension offers:
>
> * A base mapping between DCAT and CKAN datasets.
> * An RDF Parser that allows to read RDF serializations in different
> formats and extract CKAN dataset dicts, using customizable plugins.
> * An RDF Harvester that allows importing RDF serializations from other
> catalogs to create CKAN datasets.
> * An JSON DCAT Harvester that allows importing JSON objects that are
> based on DCAT terms but are not defined as JSON-LD, using the
> serialization described in the spec.datacatalogs.org site.
> "
>
> The examples folder [3] contains examples of different serializations
> successfully parsed and imported into CKAN.
>
> This work has been made possible by the Government of Sweden and
> Vinnova, as part of work on the upcoming version of  Öppnadata.se, the
> Swedish Open Data Portal.
>
>
> Feedback and issues are most welcomed!
>
> Cheers,
>
> Adrià
>
>
>
> [1] https://github.com/ckan/ckanext-dcat/
> [2] http://spec.datacatalogs.org/
> [3] https://github.com/ckan/ckanext-dcat/tree/master/examples
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