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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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Usage Of Location Properties `dcat:bbox` And `dcat:centroid` #265

Open init-dcat-ap-de opened 11 months ago

init-dcat-ap-de commented 11 months ago

Properties

We have no usage notes for dcat:bbox and dcat:centroid: grafik

DCAT has an usage notes for bounding box and centroid:

(...) E.g., the geometry could be encoded as a WKT literal (geosparql:wktLiteral [GeoSPARQL]).

Geo-DCAT is way more specific what should be used for dcat:bbox and dcat:centroid: grafik

Our usage note for dct:Location recommends the approach of GeoDCAT:

It can be represented using a controlled vocabulary or with geographic coordinates. In the latter case, the use of the Core Location Vocabulary is recommended, following the approach described in the GeoDCAT-AP specification.

Proposal: align the Range for dcat:bbox and dcat:centroid with GeoDCAT or at least directly recommend this in the usage notes.

jakubklimek commented 4 months ago

One issue to consider with the suggested approach is that the explicit enumeration of datatypes prohibits extension to further data types such as gsp:geoJSONLiteral introduced in GeoSPARQL 1.1.

Also related to #175 - as a resolution there could affect the resolution here, e.g. if one of the serializations was chosen as a preferred one, or the cardinality constraint would be lifted.