CIM WG Maintenance Request - Support DCAT3

[Sveino]

Description of issue:
Dataset version handling is very important. This is now addressed in DCAT-3 and our Metadata specification should rely on DCAT-3 so that we can easier implement support for Common Energy Data Space.
This change request is addressing the particular need from CSA and are therefor just adding the additional attributes that is needed without evaluating other elements.

Proposed resolution

• Suggest to make the following updates:

• Update line 161 to refer to DCAT-3.

• Update Figure 3 by removing time (it is no longer used) and update the diagram with the changes done on the attributes.

• Update Figure 7 based on the update done on the attribues

• Update the following attributes in Table 2:

  • Change hasCurrentVersion from String to IRI and it shall be serielized as rdf:resource.
  • Change isVersionOf from String to IRI and it shall be serielized as rdf:resource.
  • Change previousVersion from String to IRI and it shall be serielized as rdf:resource.
  • Change wasGeneratedBy form 0..n to 0..1
  • Should considere changing the following from String to stringIRI and it shall be serilized as literal.
    • dcterms:license
    • dcterms:rights
    • dcterms:rightHolder

• Add the following attributes:

  • All IRI shall be serielized as rdf:resource

name	mult	type	description
issued	0..1	Date
title	0..1	String
spartial	0..1	IRI

Need to add the addtional fields.

[Sveino]

Must update the Header and metadata list.xlsx (entsoe.eu)

[Sveino]

For the item:

Should consider changing the following from String to stringIRI and it shall be serialized as literal.
dcterms:license
dcterms:rights
dcterms:rightHolder

DIGIN is proposing the following:

    "dcterms:rights": "© 2023 Copyright",
    "dcterms:rightsHolder": "DIGIN",
    "dcterms:license": {
        "@id": "https://creativecommons.org/licenses/by-nc-sa/4.0/",
        "dcterms:title": "CC BY-NC-SA 4.0"
    },

Since JSON-LD support compound we can include both the "dcterms:title": "CC BY-NC-SA 4.0" and "@id": "https://creativecommons.org/licenses/by-nc-sa/4.0/"

dcterms:license could be exchange as:

    <dcterms:license>
      <rdf:Description rdf:about="https://creativecommons.org/licenses/by-nc-sa/4.0/">
        <dcterms:title rdf:datatype="http://www.w3.org/2001/XMLSchema#string">CC BY-NC-SA 4.0</dcterms:title>
      </rdf:Description>
    </dcterms:license>

I propose that we have String for rights and rightsHolder and stringIRII for License and we only include the URI.

[Haigutus]

Relevant links from DCAT3:
https://www.w3.org/TR/vocab-dcat-3/#license-rights
https://www.w3.org/TR/vocab-dcat-3/#Property:resource_license
https://www.w3.org/TR/vocab-dcat-3/#Property:distribution_license

DCAT3 recommendation is to use IRI, witch can tehn be URN or URL. This would mean:

1. In case of open licence, use URL defined here https://creativecommons.org/about/cclicenses/
2. In case custom/internal licence/contract, create a unique URN on internal URL

Resolvability:
In case of IRI, the resource is not expected to be available within the same resource, will be dangling reference in most cases
In case it is URL, it does not need to resolvable

Serialization:
Shall be IRI. Meaning in case of RDF/XML it is in the xml object with tag rdf:resource and in case of JSONLD @id

[Haigutus]

Comment on using Compounds:

1. Help users to get access to most relevant information of a resource without resolving it
2. The main source is still available at the source ID
3. Compound may not be up to date
4. Compound may contain only some of the original resource attributes (usually only the ones that are most relevant to receiver)