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Dataset type [RDST] #64
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Some existing type vocabularies: DCMI Type vocabulary - http://dublincore.org/documents/dcmi-terms/#section-7 ISO 19115 Scope Code vocabulary - http://registry.it.csiro.au/def/isotc211/MD_ScopeCode https://geo-ide.noaa.gov/wiki/index.php?title=ISO_19115_and_19115-2_CodeList_Dictionaries#MD_ScopeCode PARSE.Insight content-types recommended for Re3data - http://www.re3data.org/schema http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:1397899 item 15 contentType The last one takes some burrowing to find inside a PDF, so I've copied the contents of the key table here: 15 contentType PARSE.Insight type | Examples of File Formats Standard office documents | text documents, spreadsheets, presentations |
Interesting that GeoDCAT-AP models all services as types of dcat:Catalog [1] .
from https://w3c.github.io/dxwg/dcat/#class-distribution
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I think these two approaches concern two different use cases, and they are not mutually exclusive (GeoDCAT-AP uses both). In DCAT, services (besides This is also how GeoDCAT-AP models services if they are linked to from distributions, as shown in UC-18. The other use case is about having records on services as a standalone entity (which in any case gives access to data). This includes information who is the service publisher, which type of service it is (a discovery, view, download, transformation, etc. service), etc. A clarification About how GeoDCAT-AP models this, @dr-shorthair : GeoDCAT-AP uses |
OK, good. |
@dr-shorthair said:
I include here also the resource types used in DataCite, along with the corresponding Dublin Core and DCAT classes (when available), documented in the DataCite to DCAT-AP mapping exercise we carried out at JRC:
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If you need others, here's a list of about 100 different intellectual resource types: http://id.loc.gov/vocabulary/marcgt.html Many are physical document-oriented, but some could be useful such as:
There's probably a need to reach out to other lists as well, depending on how precise one wishes to be. |
dct:type is the standard predicate for 'soft-typing' a resource - i.e. providing a link to a classifier using a predicate other than rdf:type. The existential qualifier 'someValuesOf' may be used to associated dct:type with dcat:Dataset. |
PR #103 provides a hook for a 'soft-typing' classifier. |
I don't think DCAT needs to prescribe which vocabularies to use. The most appropriate typology may be domain-dependent. I agree that some form of guidance might be useful. |
The ScopeCode from ISO19115 lists: dataset-like things: Other, non dataset-like, things: This listing is clearly similar to DataCite but with the addition of properties, features etc. In my previous agencies, we have tended to use only the dataset-like types. |
Resolved in meeting https://www.w3.org/2018/02/07-dxwgdcat-minutes |
Individual (Linked Data) URIs for DataCite resource types are available here: Individual (Linked Data) URIs for Re3data PARSE.Insight content-types are available here: http://registry.it.csiro.au/def/re3data/contentType Individual (Linked Data) URIs for ISO 19115 MD_ScopeCode values are available here: http://registry.it.csiro.au/def/isotc211/MD_ScopeCode Individual (Linked Data) URIs for MARC Genre/Terms are available here: |
Example in document Overview expanded to cover the other well known resource types vocabularies |
Questions on the public list from Clemens Portele [1] and Luca Trani [2] both raise (in part) the question of DCAT scope. The addition of the This philosophy needs to be made explicit with the DCAT document. [1] https://lists.w3.org/Archives/Public/public-dxwg-comments/2018Oct/0002.html |
If one modeled a new sub class of dcat:Resource to catalog software, reusing dcat: classes and properties as appropriate, wouldn't that be an extension, not a profile? |
The distinction between 'extension' and 'profile' is not particularly useful under the open-world-assumption. The fact that only two sub-classes of |
If #650 is merged, then I think we can close this issue (woo-hoo!). |
Dataset type [RDST]
Provide a mechanism to indicate the type of data being described and recommend vocabularies to use given the dataset type indicated.
Providing examples of scope will provide guidance, without being unnecessarily restrictive. The key requirement is interoperability, achieved by using standardised vocabulary terms. It it unclear whether a canonical registry is required or whether communities should constrain choice via DCAT profiles.
Related requirements: Dataset aspects [RDSAT]
Related use cases: Scope or type of dataset with a DCAT description [ID8] Modelling resources different from datasets [ID20]
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