Drop maximum cardinality constraint on dcat:landingPage

23/07/2015

The usage note is as follows: "This property refers to a web page that provides access to the Dataset, its Distributions and/or additional information." Cardinality is 0..1.

The datasets published on the EU ODP site are not stored on the EU ODP servers, but on the data providers' servers. The EU ODP only publishes the (DCAT-AP) description of the dataset. Often data providers publish their datasets also on their own website. What is in this case the landing page?

  1. Page on the EU ODP with the dataset description + distribution links: http://open-data.europa.eu/en/data/dataset/nJjJNdT2YsgDCf29jY6kw
  2. Page on the data providers' site with the dataset description + distribution links: http://ec.europa.eu/eurostat/web/products-datasets/-/tps00060

Is is intentional that the cardinality on dataset level is 0..1? On distribution level you can have multiple access URLs, so there you could point to both sites.

 

This issue has been reported by Willem Van Gemert, Andrea Perego and David Read:

http://joinup.ec.europa.eu/mailman/archives/dcat_application_profile/2015-July/000284.html

 

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Documentation

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improvement

Comments

Thu, 06/08/2015 - 08:09

Please also see the related issue raised by the GeoDCAT-AP WG: 

https://joinup.ec.europa.eu/node/144933/

Fri, 07/08/2015 - 13:37

Use case for multiple (and additional question) landingpages: a Dataset with multiple dct:language

 

Quote from W3C DCAT

"dct:language: If the dataset is available in multiple languages, use multiple values for this property.")

 

So it is possible to have one multi-language Dataset having a dcat:landingPage pointing to a Dutch page, and another to a French page (although I guess that afterwards there then is no easy way to make a distinction between them ?)

 

Sun, 09/08/2015 - 09:03

If dcat:landingPage is repeatable, you can indeed link to pages in different languages. But you are right, there is no way to indicate the language of the individual landing pages.

Thu, 24/09/2015 - 08:49

 

Analysis: This cardinality can be relaxed if there is consensus that this is useful.

Proposal: Change cardinality of dcat:landingPage to 0..n.

Tue, 03/05/2016 - 09:25

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