---------- Forwarded message ----------
From: "Adam Sobieski" <adamsobie...@hotmail.com>
Date: Sep 19, 2016 7:15 AM
Subject: Just How Should We Share Data on the Web?
To: "public-open...@w3.org" <public-open...@w3.org>, "
public-egoverna...@w3.org" <public-egoverna...@w3.org>

Open Government Community Group,
Electronic Governance Community Group,

Phil Archer recently wrote (https://www.w3.org/blog/2016/

The UK government is currently running a survey
<https://data.blog.gov.uk/2016/08/26/discovering-how-data-is-published/> to
elicit ideas on how it should update data.gov.uk. As one of the oldest such
portals, despite various stages of evolution and upgrade, it is,
unsurprisingly, showing signs of age. Yesterday’s blog post by Owen Boswarva
 offers a good summary of the kind of issues that arise when considering
the primary and secondary functions of a data portal. Boswarva emphasizes
the need for discovery metadata (title, description, issue date, subject
matter etc.) which is certainly crucial, but so too is structural metadata
(use our Tabular Metadata <https://www.w3.org/TR/tabular-metadata/> standards
to describe your CSV, for example), licensing information
<https://www.w3.org/TR/odrl-model/>, the use of URIs as identifiers for and
within datasets, information about the quality of the data, location
information <http://w3c.github.io/sdw/bp/>, update cycle, contact point,
feedback loops, usage information and more.

It’s these kind of questions that gave rise to the Data on the Web Best
Practices WG whose primary document <https://www.w3.org/TR/dwbp/> is now at
Candidate Recommendation. We need help from the likes of Owen Boswarva and
data.gov.* portals around the world to help us gather evidence of
implementation <http://w3c.br/form-dwbp/> of course. The work is part of a
bigger picture that includes two ancillary vocabularies that can be used to
provide structured information about data quality
<https://www.w3.org/TR/vocab-dqv/> and dataset usage
<https://www.w3.org/TR/vocab-duv/>, the outputs of the Spatial Data on the
Web <https://www.w3.org/2015/spatial/> Working Group, in which we’re
collaborating with fellow standards body OGC
<http://www.opengeospatial.org/>, and the Permissions and Obligations
Expression <https://www.w3.org/2016/poe/> WG that is developing machine
readable license terms and more, beginning with the output of the ODRL
Community Group <https://www.w3.org/community/odrl/>.

A more policy-oriented view is provided by a complementary set of Best
Practices <https://www.w3.org/2013/share-psi/bp/> developed by the EU-funded
Share-PSI project. It was under the aegis of that project that the role of
the portal
<https://www.w3.org/2013/share-psi/workshop/berlin/report#portals> was
discussed at great length at a workshop I ran back in November last year.
That showed that a portal must be a lot more than a catalog: it should be
the focus of a community.

Last year’s workshop took place a week after the launch of the European
Data Portal <http://www.europeandataportal.eu/>, itself a relaunch in
response to experience gained through running earlier versions. One of the
aims of that particuilar portal is that it should act as a gateway to
datasets available throughout Europe. That implies commonly agreed
discovery metadata standards for which W3C Recommends the Data Catalog
Vocabulary,DCAT <https://www.w3.org/TR/vocab-dcat/>. However, it’s not
enough. What profile of DCAT should you use? The EU’s DCAT-AP
<https://joinup.ec.europa.eu/asset/dcat_application_profile/description> is
a good place to start but how do you validate against that? Enter SHACL
<https://www.w3.org/TR/shacl/> for example.

Those last points highlight the need for further work in this area which is
one of the motivations for the Smart Descriptions & Smarter Vocabularies (
SDSVoc <https://www.w3.org/2016/11/sdsvoc/>) workshop later this year that
we’re running in collaboration with the VRE4EIC project
<http://www.vre4eic.eu/>. We also want to talk in more general terms about
vocabulary development & management at W3C.

Like any successful activity, if data is to be discoverable, usable, useful
and used, it needs to be shared among people who have a stake in the whole
process. We need to think in terms of an ecosystem, not a shop window.

Best regards,
Adam Sobieski

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