RE: Suggested revision to class definitions in, section 5

Sounds like the dataService definition should be revised:

Ø
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Data_Servic
e> dcat:DataService represents a data service in a catalog. A data service
is a collection of operations, accessible through an interface (API) that
provide access to one or more datasets or data processing functions. Example
data services include data distribution services, data discovery services,
coordinate transformation services.

 

 

 

From: Simon.Cox@csiro.au <Simon.Cox@csiro.au> 
Sent: Wednesday, November 28, 2018 5:59 PM
To: smrtucson@gmail.com; public-dxwg-comments@w3.org
Subject: RE: Suggested revision to class definitions in, section 5

 

Ø
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Data_Servic
e> dcat:DataService represents a data service in a catalog. A data service
is a collection of operations, accessible through an interface (API) that
provides access to one or more datasets. Example data services include data
distribution services and data discovery services.

Ø
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Data_Distri
bution_Service> dcat:DataDistributionService represents a data service that
provides access to one or more datasets or extracts of datasets.

 

The reason for separating these two classes is that DataService might be a
data-transformation or data-processing service, such as coordinate
transformation, pedo-transfer function service. Yes, the service still
delivers a dataset, but it is not a dataset that already exists. That’s why
the relation “serves-dataset” is associated to DataDistributionService, not
DataService. I’m not sure if this would be understood by the phrase “that
provides access to one or more datasets”. 

 

Either need to make it clear that specific datasets are not necessarily
tightly bound to a service, or that the ‘dataset’ might be virtual, being
the result of some computation, or just say “that provides access to one or
more datasets or data processing functions”. 

 

From: AZ Stephen Richard [mailto:smrtucson@gmail.com] 
Sent: Thursday, 29 November, 2018 10:14
To: public-dxwg-comments@w3.org <mailto:public-dxwg-comments@w3.org> 
Subject: Suggested revision to class definitions in, section 5

 

Revised text to clarify that these classes represent things in the catalog,
use consistent language, and define concepts immediately. Some definitions
are repeated in subsequent text, but that shouldn’t be a problem.  If these
are accepted, I can troll through the rest of the document to check for
consistent usage.

 

 

 <https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Catalog>
dcat:Catalog represents a catalog, which is a dataset in which each
individual data item is a metadata records describing some resource; the
scope of dcat:catalog is collections of metadata about datasets or data
services. 

 <https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Resource>
dcat:Resource represents an individual item description in a catalog; each
description carries the properties defined in this model. DCAT specifies
that the described resources in a catalog are published or curated by a
single agent. This class is the parent class of
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Dataset>
dcat:Dataset,
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Data_Servic
e> dcat:DataService and
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Catalog>
dcat:Catalog in the DCAT vocabulary. A specific sub-class should be used
when available.

 <https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Dataset>
dcat:Dataset represents a dataset in a catalog. A dataset is a collection of
data, published or curated by a single agent.

 
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Data_Servic
e> dcat:DataService represents a data service in a catalog. A data service
is a collection of operations, accessible through an interface (API) that
provides access to one or more datasets. Example data services include data
distribution services and data discovery services.

 
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Data_Distri
bution_Service> dcat:DataDistributionService represents a data service that
provides access to one or more datasets or extracts of datasets.

 
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Discovery_S
ervice> dcat:DiscoveryService represents a data service that provides access
to one or more catalogs to support discovery functions.

 
<https://rawgit.com/w3c/dxwg/dcat-issue431/dcat/index.html#Class:Catalog_Rec
ord> dcat:CatalogRecord represents a metadata item in the catalog, primarily
concerning the registration information such as who added the item and when

 

(distribution is in separate message)

 

Steve

 

Minerals, Cactus, and Guitar

Tucson Arizona

smrTucson@gmail.com <mailto:smrTucson@gmail.com>