Add missing DCAT core fields

[amercader]

For datasets:

• dct:accrualPeriodicity (dct:Frequency, how do you encode those?)
• dct:spatial
• dct:temporal
• dcat:theme

For catalogs:

• dct:accrualPeriodicity (dct:Frequency, how do you encode those?)
• dct:spatial
• dct:temporal
• dcat:theme

[rossjones]

For dct:Frequency you could just choose a vocab to implement. One suggested vocab is http://dublincore.org/groups/collections/frequency/ which would involve specifing the namespace (http://purl.org/cld/freq/) and referencing them as f:weekly

[trickvi]

@amercader has this issue been solved with #19 ?

[CaptSolo]

Has this issue been solved re. dct:Frequency?

Is there a commonly accepted frequency vocab that CKAN instances may use (similarly to how CKAN loads license vocabs)?

The official frequency vocab required by DCAT-AP 1.1 is the MDR Frequency Named Authority List published by the EU Publication office: http://publications.europa.eu/mdr/authority/frequency/

Most existing CKAN deployments I've seen either do not provide this info in RDF or express it as a literal value (sometimes "wrapped" in a blank node).

[jqnatividad]

Hi folks, just pinging this issue again. Any thoughts on mapping group to theme?