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

[Jan Kučera]

Dear Stéphane and all,

first, it is good to hear about the DCAT RDF support in CKAN. Second I am
responding to the note about the best practices for open data that you are
working on at Open North. In the COMSODE project [1] we recently developed
a methodology called "Methodology for publishing datasets as open data"
which discusses the open data publication process and the related practices
[2-4]. This methodology might be relevant to your standardization
activities. We would be glad for any comments or feedback if you find any
part of the methodology interesting.

Kind regards,

Jan

[1] http://www.comsode.eu/

[2]
http://www.comsode.eu/wp-content/uploads/D5.1-Methodology_for_publishing_datasets_as_open_data.pdf

[3]
http://www.comsode.eu/wp-content/uploads/Annex1_D5.1-Documentation_of_practices.pdf

[4]
http://www.comsode.eu/wp-content/uploads/Annex2_D5.1-Methodology_Master_Spreadsheet.xlsx

2014-10-30 17:10 GMT+01:00 Stéphane Guidoin <stephane at opennorth.ca>:

> 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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>
>
>
>
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