The issue has been emailed:

• Time sent: 21/Mar/16 2:12 PM
• To: pasquale.vitale@eng.it
• with subject: *(HELP-6158) [Fiware-tech-help] [CKAN] CKAN and Linked Open Data *
  

Hi Pasquale,

The official RDF support for CKAN is currently provided by the DCAT extension:

https://github.com/ckan/ckanext-dcat

Installing it and enabling it will provide a customizable RDF serialization for all datasets [1]. This serialization can be customized writing profiles [2] for your own needs. The default profile is compatible with DCAT-AP 1.1.

Note that the semantic output in RDF refers to the metadata of the datasets, not the actual data contained on the DataStore.

Hope this helps,

Adrià

[1] https://github.com/ckan/ckanext-dcat#rdf-dcat-endpoints
[2] https://github.com/ckan/ckanext-dcat#profiles

Hi Adrià,
must I install three plugins? (dcat, dcat_rdf_harvester, dcat_json_harvester)
I just follow the documentation at this link https://github.com/ckan/ckanext-dcat#installation.

Regards
Pasquale

Hi Adrià,
I have installed only the dcat plugin.
I put in my ckan server two datasets (catalog.json and catalog.rdf downloaded from this link https://github.com/ckan/ckanext-dcat/tree/master/examples).
How can I check that it works?
Could you help me?

Thank you
Regards,
Pasquale

The issue has been emailed:

• Time sent: 21/Mar/16 4:28 PM
• To: pasquale.vitale@eng.it
• with subject: *(HELP-6158) [Fiware-tech-help] [CKAN] CKAN and Linked Open Data *
  

Hi Pasquale,

> I have installed only the dcat plugin.

Great, if you only want to produce RDF that the only one you'll need. If you want to import (harvest) RDF from other sources you'll need dcat_rdf_harvester (and the harvester extension).

> I put in my ckan server two datasets (catalog.json and catalog.rdf downloaded from this link https://github.com/ckan/ckanext-dcat/tree/master/examples).
> How can I check that it works?

You don't need to provide any existing RDF file. RDF serializations are generated on the fly from CKAN's internal metadata. You can access the RDF version of dataset visiting:

http://yourckaninstance.com/dataset/

.ttl
http://yourckaninstance.com/dataset/

.jsonld

This is an example from the CKAN demo site:

http://demo.ckan.org/dataset/newcastle-city-council-payments-over-500.rdf

There's also a catalog wide endpoint:

http://demo.ckan.org/catalog.rdf

Please check the ckanext-dcat docs for more details.

Hope this helps,

Adrià

Hi Adrià,
thank you for your reply.
I'm new in CKAN and linked open data.
I wanted to understand how to insert a dataset in LOD format.
To be honest, I've to store the context information (provided by Orion) in CKAN as LOD format.

How can I provide the metadata in CKAN and retrieve the RDF file?

Regards,
Pasquale

The issue has been emailed:

• Time sent: 22/Mar/16 12:52 PM
• To: pasquale.vitale@eng.it
• with subject: *(HELP-6158) [Fiware-tech-help] [CKAN] CKAN and Linked Open Data *
  

Hi Pasquale,

If you create a dataset by any means (eg via the API as suggested by your other question or via the web form) and have ckanext-dcat installed the RDF output will be automatically generated.

If that's not what you need please can you provide more details about what you are exactly trying to achieve? I suspect that someone with more experience with Orion would be of more help here.

Best,

Adrià