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Re: Use the void and schema.org [Was; Re: LODAtlas 1.0 release - Browsing Linked Data Catalogs]

From: Gutteridge C.J. <totl@soton.ac.uk>
Date: Thu, 4 Oct 2018 15:28:05 +0000
To: Jerven Bolleman <me@jerven.eu>, "ettorerizza@gmail.com" <ettorerizza@gmail.com>
CC: "emmanuel.pietriga@inria.fr" <emmanuel.pietriga@inria.fr>, "stellato@uniroma2.it" <stellato@uniroma2.it>, Linking Open Data <public-lod@w3.org>
Message-ID: <248415bc-6f94-caff-d0bb-64d858bd776b@soton.ac.uk>
That's the problem with Linked data in general... you never know what you're going to get by resolving a URI! At least the .well-known/void gives a kind of contract, you at least know you're asking for.

I've not plugged openorg in a while, so I'll take the excuse; it's similar to /void but instead of giving data about datasets on the site, it should return triples describing the organisation that the site is about, and datasets about that organisation. eg.  https://www.cam.ac.uk/.well-known/openorg


More about it here; http://opd.data.ac.uk/ -- we tried to say *how* as well as *what* to say.


On 04/10/2018 15:34, Jerven Bolleman wrote:
Hi Ettore

http://example.org/<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fexample.org%2F&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=NmjzXZ94Hl935kAc9CoGHhotnt%2Be6RjPoNe4B3xnImQ%3D&reserved=0>.well-known/void
e.g
https://sparql.uniprot.org/.well-known/void<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsparql.uniprot.org%2F.well-known%2Fvoid&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=AewiqdjPTDcZemQOl0wcQhJzBCk1Y4A%2Fqp6j3borJ%2Bc%3D&reserved=0>

In any case it is much simpler to paste in one single URL and select update (hourly, monthly, yearly etc...) than
60 fields. Considering our void file is 22MB uncompressed with 192283 triples I think I won't be typing that in anytime soon.

Regards,

Jerven


On Thu, Oct 4, 2018 at 4:28 PM Ettore RIZZA <ettorerizza@gmail.com<mailto:ettorerizza@gmail.com>> wrote:
Dear all,

sorry if my question seems profane, but is there a standard or a consensus proposal on the best way to store Void metadata in a LOD dataset? something like "at the root of the site, in a file called void.rdf, like a robot.txt". I see for example that DBpedia has a Void page<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdbpedia.org%2Fvoid%2Fpage%2FDataset&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=YW3VV096yqi0i5zDEiCJUNuH8v4yC%2F5md7GQfZUBR%2BM%3D&reserved=0>, but it is impossible to find it without crawling the entire web site.

Regards,

Ettore Rizza

On Thu, 4 Oct 2018 at 16:01, emmanuel.pietriga@inria.fr<mailto:emmanuel.pietriga@inria.fr> <emmanuel.pietriga@inria.fr<mailto:emmanuel.pietriga@inria.fr>> wrote:
Thanks Armando.

In LODAtlas, we are particularly interested in the links between datasets, and showing them to users so that they understand how a dataset fits in the whole cloud. That’s why we use old.datahub/lod-cloud data in the first place. Is there also support in the sort of tools you mention to declare what datasets the one of interest links to?

best,
Emmanuel

> On 4 Oct 2018, at 14:42, Armando Stellato <stellato@uniroma2.it<mailto:stellato@uniroma2.it>> wrote:
>
> Just marginal on the main topic here, however I thought it good to put my two cents in support of the automatic generation of metadata profiles for datasets.
>
>
>
> The Collaborative editor for OWL ontologies, SKOS(/XL) thesauri and OntoLex lexicons VocBench 3 [1] allows for the semi-automatic generation of dataset metadata profiles [2].
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> The system prompts for generic metadata (title, homepage etc..) about the dataset, while everything that can be computed over the data is generated automatically.
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>
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> Currently there are generators for:
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> 1.      VoID and LIME [3,4] descriptions. LIME is the LInguistic MEtadata module developed in the context of the OntoLex specification, though as a metadata vocabulary it can be used for any kind of dataset, providing statistical and qualitative information about the lexical asset of datasets
>
> 2.      DCAT/DCAT-AP [5] profiles
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> 3.      ADMS
>
>
>
> and they are loaded as implementation of an extension point, so other implementations could be added
>
>
>
> Cheers,
>
>
> Armando
>
>
>
> [1] http://vocbench.uniroma2.it/<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fvocbench.uniroma2.it%2F&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=dn02ysRyhxJMeVqX%2F7%2Bnt5A9QL97IE4CD0Rzh5uewZk%3D&reserved=0>
>
> [2]  http://vocbench.uniroma2.it/doc/user/metadata_vocabularies.jsf<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fvocbench.uniroma2.it%2Fdoc%2Fuser%2Fmetadata_vocabularies.jsf&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=V9U2OoHIILSosgC7SFzuiyOPirsWYyPUFrtmlw18OZ0%3D&reserved=0>
>
> [3] https://www.w3.org/2016/05/ontolex/#metadata-lime<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2F2016%2F05%2Fontolex%2F%23metadata-lime&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=QhmK7vYZuk9U9iRjMkGupG4wY4OOSMocMzfXws%2BPpx4%3D&reserved=0>
>
> [4] https://link.springer.com/chapter/10.1007/978-3-319-18818-8_20<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flink.springer.com%2Fchapter%2F10.1007%2F978-3-319-18818-8_20&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=HF8wx3%2BxCDmVKEEYcx%2BBxSfLOEfbbjW1kAfx4tQlEEc%3D&reserved=0>
>
> [5] https://joinup.ec.europa.eu/solution/dcat-application-profile-data-portals-europe<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fjoinup.ec.europa.eu%2Fsolution%2Fdcat-application-profile-data-portals-europe&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=gCDTiiwZPTTAsjP67xuO6FnrqYtt38UZDBIXE7dvOrM%3D&reserved=0>
>
> [6] https://www.w3.org/TR/vocab-adms/<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fvocab-adms%2F&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=dVgFxqp4bqNyCHBOqVkNqfQhW4oiTrLONAc2y8s57Xg%3D&reserved=0>
>
>
>
>
>
> From: Gray, Alasdair J G <A.J.G.Gray@hw.ac.uk<mailto:A.J.G.Gray@hw.ac.uk>>
> Sent: Thursday, October 4, 2018 1:58 PM
> To: emmanuel.pietriga@inria.fr<mailto:emmanuel.pietriga@inria.fr>
> Cc: Jerven Bolleman <me@jerven.eu<mailto:me@jerven.eu>>; Linking Open Data <public-lod@w3.org<mailto:public-lod@w3.org>>
> Subject: Re: Use the void and schema.org<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fschema.org&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=yn6fula5ywrrhpT42Y1hJRwhHExS2O1q3kPZD8BPVqs%3D&reserved=0> [Was; Re: LODAtlas 1.0 release - Browsing Linked Data Catalogs]
>
>
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>
>
>
>
> On 4 Oct 2018, at 12:00, emmanuel.pietriga@inria.fr<mailto:emmanuel.pietriga@inria.fr> wrote:
>
>
>
> - Has VoID achieved good coverage yet? (I remember reading that few datasets were exposing VoID descriptions, but that may have been several years ago and things might have changed)
>
>
>
> Harvesting VoIDs/schema.org<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fschema.org&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=yn6fula5ywrrhpT42Y1hJRwhHExS2O1q3kPZD8BPVqs%3D&reserved=0> would be a good way of encouraging up take. It is likely that there will be a big increase in schema.org<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fschema.org&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=yn6fula5ywrrhpT42Y1hJRwhHExS2O1q3kPZD8BPVqs%3D&reserved=0> markup now that Google have released a dataset search tool.
>
> https://www.blog.google/products/search/making-it-easier-discover-datasets/<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.blog.google%2Fproducts%2Fsearch%2Fmaking-it-easier-discover-datasets%2F&data=01%7C01%7Ctotl%40soton.ac.uk%7C2b6d2c6ba4f04a59faaf08d62a07215a%7C4a5378f929f44d3ebe89669d03ada9d8%7C1&sdata=%2FkaZgpu81KkYXDDi%2BJ2zmqWEsyB59i65lSBfc4%2FTmnQ%3D&reserved=0>
>
>
>
> - How do we get those decentralized VoID descriptions? Is there a crawling service somewhere that would give us access to such descriptions?
>
>
>
> Starting, as Jerven suggested, by allowing people to provide you the URI of the VoID, but also following the links in VoIDs to other datasets.
>
>
>
> Alasdair
>
>
>
> --
>
> Alasdair J G Gray
>
> Associate Professor in Computer Science,
> School of Mathematical and Computer Sciences
> Heriot-Watt University, Edinburgh, UK.
>
> Email: A.J.G.Gray@hw.ac.uk<mailto:A.J.G.Gray@hw.ac.uk>
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--
Jerven Bolleman
me@jerven.eu<mailto:me@jerven.eu>


--
Christopher Gutteridge <totl@soton.ac.uk><mailto:totl@soton.ac.uk>
You should read our team blog at http://blog.soton.ac.uk/webteam/

Received on Thursday, 4 October 2018 15:28:35 UTC

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