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SEMICeu / DCAT-AP

This is the issue tracker for the maintenance of DCAT-AP
https://joinup.ec.europa.eu/solution/dcat-application-profile-data-portals-europe
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Add chapter on inverse properties? #300

Closed terjesyl closed 3 months ago

terjesyl commented 1 year ago

Given that dcat:next and dcat:seriesMember have been introduced, would it be worth adding a chapter similar to the DCAT chapter Use of inverse properties ? Especially important is the requirement that inverses "MAY be used only in addition to [its property], and that they MUST NOT be used to replace them."

These are the properties I found in DCAT-AP with inverses.

Property Inverse
dcat:prev dcat:next
dct:hasPart dct:isPartOf
dcat:hasVersion dcat:isVersionOf
dcat:inSeries dcat:seriesMember
bertvannuffelen commented 1 year ago

To the community is there any preference of any of these: what is the master, what is the derived?

terjesyl commented 1 year ago

If there is no specific reason for doing otherwise, I suggest following DCAT here.

matthiaspalmer commented 12 months ago

I think we should consider use cases where also dcat:seriesMember are used as the master when dataset series are created independently from the datasets they contain, for example:

Hundreds of municipalities provide air quality datasets, all conforming to the same specification. The national environmental agency takes on the role of aggregator and creates a dataset series corresponding to all air quality measurments in the country as a whole for easy overview / access.

Note 1: the newly formed dataset series is expressed in a catalog and refers to datasets expressed in hundreds of different catalogs.

Note 2: in this scenario nothing prohibits that a dataset appears in multiple dataset series. (E.g. a regional dataset series in addition to a national.)

If we are to allow scenarios like this we cannot assume that dcat:inSeries is the master, if by that we mean that we mean that we do not consider it's inverse being present (for instance in portals).

bertvannuffelen commented 8 months ago

Added in https://semiceu.github.io/DCAT-AP/releases/3.0.0-draft/#inverse-properties