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Re: License unknown

From: M. Scott Marshall <mscottmarshall@gmail.com>
Date: Wed, 18 Jun 2014 14:46:28 +0200
Message-ID: <CACHzV2PgO0kSTeVc7DJX55cyCGZTHWbMxYs+OREkw3ZvNHo7gA@mail.gmail.com>
To: Alan Ruttenberg <alanruttenberg@gmail.com>
Cc: Jerven Bolleman <me@jerven.eu>, "Gray, Alasdair J G" <A.J.G.Gray@hw.ac.uk>, HCLS IG <public-semweb-lifesci@w3.org>
Just a slight tweak to Alan's suggestion (thanks Alan):
:determined-license "true"^xsd:Boolean

-Scott

On Wed, Jun 18, 2014 at 2:36 PM, Alan Ruttenberg
<alanruttenberg@gmail.com> wrote:
> I concur. This is clear from the semantics of OWL. Understand the difference
> between integrity constraints and OWL assertions.
>
> If you want to say that there was an attempt to find a license and that it
> couldn't be found, say that. You could do so as an annotation on the axiom,
> or as a distinct property e.g.
> :tried-to-determine-license "true"^xsd:Boolean
>
> This can remain true, as a historical fact, even after a license is found.
>
> For more about integrity constraints see http://clarkparsia.com/pellet/icv/
>
> -Alan
>
>
>
> On Monday, June 16, 2014, Jerven Bolleman <me@jerven.eu> wrote:
>>
>> Hi Alasdair,
>>
>> I think you are closing the world the wrong way. Both in limiting a
>> dataset to have one license and secondly by having an "unknown" string
>> to encode that you don't know something.
>> Instead of using "unknown" you should use a blank node.
>>
>> cc:CC0 owl:sameAs "unknown"
>>
>> is plain wrong and can't be inferred
>>
>> cc:CC0 owl:sameAs _:1
>>
>> is fine and a nice way of allowing dataset from different sources
>> descriptions to be combined and give more information.
>>
>> If you don't want a blank node, make a local node instead.
>> cc:CC0 owl:sameAs <./#license>
>>
>> I implore you to change your mind on this. Choose semantics over special
>> values!
>>
>> Regards,
>> Jerven
>>
>>
>> On Mon, Jun 16, 2014 at 5:44 PM, Gray, Alasdair J G <A.J.G.Gray@hw.ac.uk>
>> wrote:
>> > Hi Jerven,
>> >
>> > We are trying to ensure that a license is provided for a dataset, and
>> > that
>> > only one license is provided. (We are closing the world in certain
>> > areas.)
>> >
>> > Our proposed solution is written up at
>> > https://github.com/joejimbo/HCLSDatasetDescriptions/issues/65
>> >
>> > Alasdair
>> >
>> > On 2 Jun 2014, at 16:47, Jerven Bolleman <me@jerven.eu> wrote:
>> >
>> > Hi Alasdair,
>> >
>> > It is good practice in my opinion to not state unknown facts. If you
>> > want to state there should be a license but you don't know it I think
>> > some owl modelling is called for.
>> >
>> > e.g. roughly like this.
>> >
>> > dusty_data a dct:Dataset .
>> > dusty_data rdfs:subClassOf [ a owl:Restriction ;
>> >                                            owl:onProperty dct:license ;
>> >                                            owl:minCardinality 1 ]
>> >
>> >
>> > If anyone does something like
>> >
>> > dusty_data a dct:dataset .
>> > dusty_data dct:license bad_example:unknown_license .
>> >
>> > and then someone figures out it has a license .
>> >
>> > dusty_data a dct:Dataset .
>> > dusty_data dct:license cc:zero .
>> >
>> > And puts all those triples into one store/ontology then queries will
>> > start to return wrong data.
>> >
>> > SELECT ?datasetWithALicense
>> > WHERE {
>> > ?datasetWithALicense dct:license ?license .
>> > }
>> >
>> > Will give 2 bindings for ?dataset and ?license one of them being wrong
>> > now.
>> >
>> > If you ask the same question depending on the better modelling then
>> > you get the correct answer in both cases.
>> >
>> > SELECT ?datasetWIthoutLicense
>> > WHERE {
>> > ?datasetWIthoutLicense a dct;Dataset .
>> > MINUS ( ?datasetWIthoutLicense dct:license ?license )
>> > }
>> >
>> > SELECT ?datasetWIthALicense
>> > WHERE {
>> > ?datasetWIthALicense a dct;Dataset .
>> > ?datasetWIthALicense dct:license ?license .
>> > }
>> >
>> > Both give the expected results.
>> >
>> >
>> > In general in RDF just state what you know and describe what you don't
>> > know.
>> >
>> > Regards,
>> > Jerven
>> >
>> > On Mon, Jun 2, 2014 at 5:25 PM, Gray, Alasdair J G <A.J.G.Gray@hw.ac.uk>
>> > wrote:
>> >
>> > Hi,
>> >
>> > I am working to help shape the Healthcare and Life Sciences community
>> > profile for describing datasets, current version available from [1]
>> >
>> > One of our goals is that there is a minimal set of properties that are
>> > available for all datasets, and we would like these properties to
>> > include
>> > the license. However we have the problem that for several legacy
>> > datasets
>> > the license is simply unknown. Does anyone know of a resource that can
>> > be
>> > used to represent that the license is unknown as the value of a
>> > dcterms:license predicate?
>> >
>> > Thanks
>> >
>> > Alasdair
>> >
>> > [1] https://github.com/joejimbo/HCLSDatasetDescriptions
>> >
>> > Alasdair J G Gray
>> > Lecturer in Computer Science, Heriot-Watt University, UK.
>> > Email: A.J.G.Gray@hw.ac.uk
>> > Web: MailScanner has detected a possible fraud attempt from
>> > "www.macs.hw.ac.uk" claiming to be http://www.alasdairjggray.co.uk
>> > ORCID: http://orcid.org/0000-0002-5711-4872
>> > Telephone: +44 131 451 3429
>> > Twitter: @gray_alasdair
>> >
>> >
>> >
>> >
>> >
>> >
>> > ________________________________
>> >
>> > Sunday Times Scottish University of the Year 2011-2013
>> > Top in the UK for student experience
>> > Fourth university in the UK and top in Scotland (National Student Survey
>> > 2012)
>> >
>> > We invite research leaders and ambitious early career researchers to
>> > join us
>> > in leading and driving research in key inter-disciplinary themes. Please
>> > see
>> > www.hw.ac.uk/researchleaders for further information and how to apply.
>> >
>> > Heriot-Watt University is a Scottish charity registered under charity
>> > number
>> > SC000278.
>> >
>> >
>> >
>> >
>> > --
>> > Jerven Bolleman
>> > me@jerven.eu
>> >
>> >
>> > Alasdair J G Gray
>> > Lecturer in Computer Science, Heriot-Watt University, UK.
>> > Email: A.J.G.Gray@hw.ac.uk
>> > Web: MailScanner has detected a possible fraud attempt from
>> > "www.macs.hw.ac.uk" claiming to be http://www.alasdairjggray.co.uk
>> > ORCID: http://orcid.org/0000-0002-5711-4872
>> > Telephone: +44 131 451 3429
>> > Twitter: @gray_alasdair
>> >
>> >
>> >
>> >
>> >
>> >
>> > ________________________________
>> >
>> > Sunday Times Scottish University of the Year 2011-2013
>> > Top in the UK for student experience
>> > Fourth university in the UK and top in Scotland (National Student Survey
>> > 2012)
>> >
>> > We invite research leaders and ambitious early career researchers to
>> > join us
>> > in leading and driving research in key inter-disciplinary themes. Please
>> > see
>> > www.hw.ac.uk/researchleaders for further information and how to apply.
>> >
>> > Heriot-Watt University is a Scottish charity registered under charity
>> > number
>> > SC000278.
>>
>>
>>
>> --
>> Jerven Bolleman
>> me@jerven.eu
>>

-- 
M. Scott Marshall, PhD
MAASTRO clinic, http://www.maastro.nl/en/1/
http://eurecaproject.eu/
http://semantic-dicom.org/
https://plus.google.com/u/0/114642613065018821852/posts
http://www.linkedin.com/pub/m-scott-marshall/5/464/a22
Received on Wednesday, 18 June 2014 12:46:56 UTC

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