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Comments on UC ID38 (Time-related aspects)

From: <andrea.perego@ec.europa.eu>
Date: Thu, 13 Jul 2017 12:44:40 +0000
To: <jaroslav.pullmann@fit.fraunhofer.de>
CC: <public-dxwg-wg@w3.org>
Message-ID: <EDFF15E839F79242AA55B1468C63DDA901FC0F7E@S-DC-ESTG02-J.net1.cec.eu.int>
Dear Jaroslav,

A couple of notes on the meta-UC concerning "time" [1], in particular wrt the 2nd list in the "Comments" section:

1. "Creation, modification time already covered by dct:issued, dct:modified": This is not completely correct, at least looking at how these DC properties are used. More precisely, dct:issued is about the issue / publication date, whereas DC has a specific property for "creation date", namely, dct:created. So, I would suggest revising the sentence above as follows: "Creation, publication, modification time already covered by dct:created, dct:issued, dct:modified, respectively"

2. I wonder whether we should consider additional time-related properties provided by DC, and used also in DataCite. For the list, you can check the relevant mapping table included in the DataCite to DCAT-AP mapping study [2]. These include dct:date, dcat:dataAccepted, dct:available, dct:dateCopyrighted, dct:dataSubmitted, dct:valid. Actually, I'm not sure they should (all) be included - unless we have specific use cases requiring them. Anyway, I guess we should at least acknowledge their existence and use in existing metadata standards, and possibly motivate those we decide to leave out.

3. I wonder whether DC property dct:valid is relevant for the points concerning data retention, and expiry of data/records.

4. It may be worth including a reference to PROV - in particular, the DC to PROV mapping specification [3] - which may be used for a more sophisticated representation of some time-related aspects wrt DC.

5. Probably I missed it, but a time-related aspect that I don't see in the list concerns "update frequency" (i.e., how frequently a dataset / distribution is updated). This is usually modelled with dct:accrualPeriodicity.

Cheers,

Andrea

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[1]https://www.w3.org/2017/dxwg/wiki/Use_Case_Working_Space#Time-related_aspects
[2]https://webgate.ec.europa.eu/CITnet/stash/projects/ODCKAN/repos/datacite-to-dcat-ap/browse/documentation/Mappings.md
[3]http://www.w3.org/TR/prov-dc/#list_of_direct_terms_props 
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Andrea Perego, Ph.D.
Scientific / Technical Project Officer
European Commission DG JRC
Directorate B - Growth and Innovation
Unit B6 - Digital Economy
Via E. Fermi, 2749 - TP 262
21027 Ispra VA, Italy

https://ec.europa.eu/jrc/

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The views expressed are purely those of the writer and may
not in any circumstances be regarded as stating an official
position of the European Commission.
Received on Thursday, 13 July 2017 12:45:11 UTC

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