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Re: [ANN] Linked Data Templates: First draft and Call for participation

From: Osayuki Joseph Idehen <joidehen@hotmail.co.uk>
Date: Thu, 29 Jun 2017 21:40:33 +0000
To: "Gray, Alasdair J G" <a.j.g.gray@hw.ac.uk>, Martynas Jusevičius <martynas@atomgraph.com>
CC: public-lod <public-lod@w3.org>, Semantic Web <semantic-web@w3.org>, Hydra <public-hydra@w3.org>, "public-sparql-dev@w3.org" <public-sparql-dev@w3.org>, "public-rww@w3.org" <public-rww@w3.org>, "public-ldp@w3.org" <public-ldp@w3.org>, Tim Berners-Lee <timbl@w3.org>
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Linked data support's various data serialization via Openlink Software Virtuoso Server. Visit http://www.openlinksw.com  website for more details.

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From: Gray, Alasdair J G <A.J.G.Gray@hw.ac.uk>
Sent: Thursday, June 29, 2017 12:03:47 PM
To: Martynas Jusevičius
Cc: public-lod; Semantic Web; Hydra; public-sparql-dev@w3.org; public-rww@w3.org; public-ldp@w3.org; Tim Berners-Lee
Subject: Re: [ANN] Linked Data Templates: First draft and Call for participation

Hi Martynas

The Linked Data Templates look like a really interesting way of getting a read/write data web. However, I’m unclear whether you support data returned in non-RDF serialisations, e.g. CSV, or JSON.

In the Open PHACTS Discovery Platform [1] we used the Linked Data API to provide an abstraction for our web (HTML/CSS/JSON) app developers so that they did not need to be proficient in Semantic Web technologies (RDF, OWL). This greatly improved the efficiency of the development of our project as it meant our app developers could focus on what they were good at and the semantic web technology was exploited but hidden [2].

I have more recently be using the Linked Data API approach in different projects where we are starting to see a need for being able to write data, not just read it.

It would be a huge limitation of the Linked Data Templates if they did not support serialising to CSV, JSON, etc.

Best regards,


[1] https://dev.openphacts.org/
[2] http://content.iospress.com/articles/semantic-web/sw088

On 29 Jun 2017, at 10:47, Martynas Jusevičius <martynas@atomgraph.com<mailto:martynas@atomgraph.com>> wrote:

Fellow Linked Data and Semantic Web developers,

apologies for cross-posting.

I am pleased to present the first public draft of Linked Data Templates specification:

The purpose of Linked Data Templates (LDT) is to provide means to define read-write Linked Data APIs declaratively using SPARQL and specify a uniform interaction protocol for them. We see it and use it as a declarative and better-defined alternative to Linked Data Platform [1].

LDT is a formalization of the Linked Data processing model found in our AtomGraph Processor [2]. It has evolved from, and has been tested in, real-world Linked Data applications [3]. A summary of the approach can be found in the XML London 2016 paper [4].
For an example of LDT ontology, see [5].

We feel that LDT could become a cornerstone technology of a distributed Semantic Web. That said, we would like to receive some feedback as an indication if this is something that the community finds interesting and is willing to work on.

If you find this approach interesting, please join the Declarative Apps Community Group: https://www.w3.org/community/declarative-apps/

The goals of the CG are to be stated in a charter. We have proposed the following:

  The Declarative Apps CG shall develop a specification for 1) declarative application descriptions that map Linked Data interactions to SPARQL commands and can be expressed as RDF ontologies 2) a uniform read-write Linked Data protocol for such ontology-driven applications.

  The protocol should allow for (but not be limited to) implementation of a distributed web architecture, support HATEOAS [6] and foster reuse of Linked Data API descriptions and development of generic software. The evaluation of interactions shall be unambiguous and defined using precise semantics.

  The specification(s) must be compatible with RDF, SPARQL, RDFS, OWL, WebID [7], SPIN [8] specifications; they should be orthogonal to any concrete RDF syntax and/or concrete transport protocol (HTTP, IPFS [9] etc). However, the specification shall provide bindings for the HTTP protocol.

Looking forward to your feedback and participation.

Best regards,


[1] https://www.w3.org/TR/ldp/
[2] https://github.com/AtomGraph/Processor
[3] https://www.w3.org/2011/09/LinkedData/ledp2011_submission_1.pdf
[4] https://github.com/AtomGraph/Linked-Data-Templates/blob/master/XML%20London%202016%20paper/Linked%20Data%20Templates.pdf
[5] https://github.com/AtomGraph/Processor/blob/master/src/main/resources/com/atomgraph/processor/dht.ttl
[6] https://en.wikipedia.org/wiki/HATEOAS
[7] https://www.w3.org/2005/Incubator/webid/spec/
[8] http://spinrdf.org<http://spinrdf.org/>
[9] https://ipfs.io<https://ipfs.io/>

Alasdair J G Gray
Fellow of the Higher Education Academy
Assistant Professor in Computer Science,
School of Mathematical and Computer Sciences
(Athena SWAN Bronze Award)
Heriot-Watt University, Edinburgh UK.

Email: A.J.G.Gray@hw.ac.uk<mailto:A.J.G.Gray@hw.ac.uk>
Web: http://www.macs.hw.ac.uk/~ajg33
ORCID: http://orcid.org/0000-0002-5711-4872
Office: Earl Mountbatten Building 1.39
Twitter: @gray_alasdair


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Received on Thursday, 29 June 2017 21:41:19 UTC

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