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W3C Data Catalog Vocabulary (DCAT) - Comments

From: Daniel Pop <daniel.pop@e-uvt.ro>
Date: Mon, 28 Jan 2019 13:38:14 +0200
Message-ID: <CALTOhaV9xgqAtqqymw_=WiVfzJC0ztOKuA71u86-hckaRquNCg@mail.gmail.com>
To: public-dxwg-comments@w3.org
In response to request for comments re: [1], please find below my comments

1) accuralPeriodicity property is set at Dataset level; can't we have
different distributions with different periodicity? For example a REST API
service that provides real-time data stream, and CSV distributions issued
daily/weekly/monthly? Thus, accuralPeriodicity being a property rather per
distribution than dataset? Or is it better to have multiple datasets for
this purpose? I am thinking at exchange rates as an example, but not

2) wasDerivedFrom allows to move backwards; what about moving forward? I
mean a property such as isDerivationBaseFor, so one can retrieve
derived/following datasets as well.

3) DiscoveryService - what is the distinctive feature of a DiscoveryService
compared to a DataDistributionService? From the diagram depicted in Figure
1 one can tell that it must serve at least one dataSet (servesDataset
property is 1.*). But the example in section 5.9 does not show such a
property. Is this just a small discrepancy that should be addressed in the
example? Should DiscoveryService be DataDistribution service? Should
multiplicity of 'serves' relationship between DataService and Dataset be
optional (ie 0..*)?

Best regards,

Daniel POP

West University of Timisoara, Romania

[1] https://www.w3.org/TR/vocab-dcat-2/
Received on Monday, 28 January 2019 22:21:53 UTC

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