23 Jul 2016

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Reputation data portability

Yesterday I went to the

23 Jul 2016 11:24am GMT

18 Jul 2016

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AKSW Colloquium, 18.07.2016, AEGLE and node2vec

On Monday 18.07.2016, Kleanthi Georgala will give her Colloquium presentation for her paper "An Efficient Approach for the Generation of Allen Relations" , that was accepted at the European Conference on Artificial Intelligence (ECAI) 2016. Abstract Event data is increasingly being represented according to the Linked Data principles. The need for large-scale machine learning on data represented in this format has thus led to the need for efficient approaches to compute RDF links between resources based on their temporal properties. Time-efficient approaches for computing links between RDF resources have been developed over the last years. However, dedicated approaches for linking ...

18 Jul 2016 12:56pm GMT

11 Jul 2016

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FINAL call for DC-2016 Presentations and Best Practice Posters/Demos

2016-07-11, The submission deadline of 15 July is rapidly approaching for the Presentations and Best Practice Posters and Demos tracks at DC-2016 . Both presentations and posters/demos provide the opportunity to practitioners and researchers specializing in metadata design, implementation, and use to present their work at the International Conference on Dublin Core and Metadata Applications in Copenhagen. No paper is required for presentations or posters/demos. Accepted submissions in the Presentations track will have approximately 20-25 minutes to present and 5-10 minutes for questions and discussion. Proposal abstracts will be reviewed for selection by the Program Committee. The presentation slide decks ...

11 Jul 2016 11:59pm GMT

Dublin Core at 21

2016-07-11, 2016-07-11, Announcing an IFLA Satellite event: Friday, August 19 at OCLC in Dublin, OH. The Dublin Core originated in 1995 at a meeting at OCLC (in the very room where this IFLA Satellite event will take place). This special event will bring an historical view of DCMI's history through people who were there when the Web was young and Dublin Core was new and evolving rapidly. Presenters will include metadata experts with long ties to Dublin Core including several who were at the original invitational meeting in 1995. A panel discussion will permit speakers to reflect on activities and ...

11 Jul 2016 11:59pm GMT

10 Jul 2016

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Setting up a local SPARQL endpoint

... has never been easier, and I have to say, with Virtuoso it already was easy. Step 1: download the jar and fire up the server OK, you do need Java installed, and for many this is still the case, despite Oracle doing their very best to totally ruin it for everyone . But seriously, visit the Blazegraph website ( @blazegraph ) and download the jar and type: $ java -jar blazegraph.jar It will give some output on the console, including a webpage with SPARQL endpoint, upload form etc. That it tracks past queries is a nice extra. Step 2: there ...

10 Jul 2016 6:57pm GMT

02 Jul 2016

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Working from home

A colleague asked me about my experiences working from home so I've made a few notes here. I'm unusual in my department in that I work from home three or four days a week, and one or two in London, or very occasionally Salford. I started off in this job on an EU-funded project where everyone was remote, and so it made little difference where I was physically as long as we synced up regularly. Since then I've worked on multiple other projects where the other participants are mostly in one place and I'm elsewhere. That's made it more difficult, but also, ...

02 Jul 2016 5:11pm GMT

Two Apache Jena SPARQL query performance observations

Doing searches in RDF stores is commonly done with SPARQL queries. I have been using this with the semantic web translation of WikiPathways by Andra to find common content issues, though sometimes combined with some additional Java code. For example, find PubMed identifiers that are not numbers. Based on Ryan 's work on interactions, a more complex curation query I recently wrote in reply to issues that Alex ran into with converting pathways to BioPax, is to find interactions that convert a gene to another gene. Such occurred in WikiPathways because graphically you do not see the difference. I originally ...

02 Jul 2016 1:07pm GMT

01 Jul 2016

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Read Write Web — Q2 Summary — 2016

Summary Decentralization is becoming more and more of a theme on the web, and this quarter witnessed the Decentralized Web Summit , in San Francisco. Keynotes from Tim Berners-Lee and Vint Cerf are definitely worth checking out. Some interesting work is coming up in as a verified claims working group has been proposed . The editors draft is available for review. In the Community Group, there has been a some discussion, but main focus is on apps, and also a specification for linked data notifications has been started. Communications and Outreach Aside from the Decentralized Web Summit, some folks attended ...

01 Jul 2016 4:41pm GMT

PoolParty at Connected Data London

Connected Data London "brings together the Linked and Graph Data communities". More and more Linked Data applications seem to emerge in the business world and software companies make it part of their business plan to integrate Graph Data in their data stories or in their features. MarkLogic is opening a new wave to how enterprise databases should be used to push over the limits of closed, rigid structures to integrate more data. Neo4j explains how you can enrich existing data and follow new connections and leads for investigations of the Panama Papers . No wonder the communities in different locations ...

01 Jul 2016 1:33pm GMT

29 Jun 2016

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AKSW Colloquium, 04.07.2016. Big Data, Code Quality.

On the upcoming Monday (04.07.2016), AKSW group will discuss topics related to Semantic Web and Big Data as well as programming languages and code quality. In particular, the following papers will be presented: S2RDF: RDF Querying with SPARQL on Spark by Alexander Schätzle et al. Presented by: Ivan Ermilov RDF has become very popular for semantic data publishing due to its flexible and universal graph-like data model. Yet, the ever-increasing size of RDF data collections makes it more and more infeasible to store and process them on a single machine, raising the need for distributed approaches. Instead of building a ...

29 Jun 2016 10:34am GMT

27 Jun 2016

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Accepted Papers of AKSW Members @ Semantics 2016

This year's SEMANTiCS conference which is taking place between September 12 - 15, 2016 in Leipzig recently invited for the submission of research papers on semantic technologies. Several AKSW members seized the opportunity and got their submitted papers accepted for presentation at the conference. These are listed below: Executing SPARQL queries over Mapped Document Stores with SparqlMap -M (Jörg Unbehauen, Michael Martin ) Distributed Collaboration on RDF Datasets Using Git: Towards the Quit Store (Natanael Arndt, Norman Radtke and Michael Martin) Towards Versioning of Arbitrary RDF Data (Marvin Frommhold, Ruben Navarro Piris, Natanael Arndt, Sebastian Tramp, Niklas Petersen and Michael ...

27 Jun 2016 10:50am GMT

26 Jun 2016

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AKSW Colloquium, 27.06.2016, When owl:sameAs isn’t the Same + Towards Versioning for Arbitrary RDF Data

In the next Colloquium, June the 27th at 3 PM, two papers will be presented: When owl:sameAs isn't the Same: An Analysis of Identity in Linked Data André Valdestilhas will present the paper "When owl:sameAs isn't the Same: An Analysis of Identity in Linked Data" by Halpin et al. [ PDF ]: Abstract : In Linked Data, the use of owl:sameAs is ubiquitous in interlinking data-sets. There is however, ongoing discussion about its use, and potential misuse, particularly with regards to interactions with inference. In fact, owl:sameAs can be viewed as encoding only one point on a scale of similarity, one that is ...

26 Jun 2016 1:46pm GMT

25 Jun 2016

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New Paper: "Using the Semantic Web for Rapid Integration of WikiPathways with Other Biological Online Data Resources"

Andra Waagmeester published a paper on his work on a semantic web version of the WikiPathways (doi: 10.1371/journal.pcbi.1004989 ). The paper outlines the design decisions, shows the SPARQL endpoint , and several examples SPARQL queries. These include federates queries, like a mashup with DisGeNET (doi: 10.1093/database/bav028 ) and EMBL-EBI's Expression Atlas . That results in nice visualisations like this: If you have the relevant information in the pathway, these pathways can help a lot in helping understanding of what is biologically going on. And, of course, used for exactly that a lot. Press release Because press releases have become an ...

25 Jun 2016 9:44am GMT

23 Jun 2016

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The state of open licensing

I spend a lot of time reading through licences and terms & conditions. Much more so than I thought I would when I first started getting involved with open data. After all, I largely just like making things with data. But there's still so much data that is

23 Jun 2016 7:03pm GMT

22 Jun 2016

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Should I publish my dataset under an open license?

Undecided, stand back we know flowcharts: Taken from my slides for my keynote at TKE: Linguistic Linked Open Data, Challenges, Approaches, Future Work from Sebastian Hellmann

22 Jun 2016 9:41am GMT

21 Jun 2016

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From services to products

Over the course of my career I've done a variety of consulting projects as both an employee and freelancer. I've helped found and run a small consulting team. And, through my experience leading engineering teams, some experience of designing products and platforms. I've been involved in a few discussions, particularly over the last 12 months or so, around how to generate repeatable products off the back of consulting engagements. I wanted to jot down a few thoughts here based on my own experience and a bit of background reading. I don't claim to have any special insight or expertise, but the topic is one ...

21 Jun 2016 5:15pm GMT