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International-Data-Spaces-Association / ids-specification

The Dataspace Protocol is a set of specifications designed to facilitate interoperable data sharing between entities governed by usage control and based on Web technologies. These specifications define the schemas and protocols required for entities to publish data, negotiate Agreements, and access data in a data space
https://docs.internationaldataspaces.org/dataspace-protocol/
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Dataset.odrl:hasPolicy 1:1 or 1:N? #76

Closed matgnt closed 1 year ago

matgnt commented 1 year ago

As described in here: https://github.com/International-Data-Spaces-Association/ids-specification/blob/main/catalog/catalog.protocol.md#311-odrlhaspolicy

An asset entry Dataset must have 1..N hasPolicy attributes that contain an ODRL Offer

all the examples I could find did NOT contain a list, e.g. https://github.com/International-Data-Spaces-Association/ids-specification/blob/main/catalog/message/example/dcat.distribution.example.json#L17

but only a single policy/offer.

Also from ODRL or Dcat, I could not understand that this is a list. Can we reference the 'upstream' source that odrl:hasPolicy can be a list - or if this is a specific 'Dcat profile' change, it should be listed as such here I guess: https://github.com/International-Data-Spaces-Association/ids-specification/blob/main/catalog/catalog.protocol.md#5-dcat-and-odrl-profiles

matgnt commented 1 year ago

Short summary of last weeks meeting: 'odrl:hasPolicy' is supposed to be a list. Todo: double-check with dcat.

sebbader-sap commented 1 year ago

Todo: double-check with dcat.

Check, the DCAT definitions map to a JSON Array in JSON-LD.