AKSW at web.br in São Paulo

From October 1st until 6th a delegation from AKSW Group, Leipzig University of Applied Sciences (HTWK), eccenca GmbH, and Max Planck Institute for Human Cognitive and Brain Sciences went to São Paulo, Brazil to meet people from the Web Technologies Study Center (ceweb.br) for evaluation future collaboration.
For getting to know our mutual research interests we held the Workshop on Linked Data Management.


The Workshop on Linked Data Management (Workshop sobre Gestão de Dados Abertos) was co-located with the annual conference of the Brazilian Word Wide Web Consortium (Conferencia web.br 2018) in São Paulo.
During the workshop 11 talks were held by researchers from the Brazilian hosts and the German delegation.
By mutually presenting our research areas, open questions, and visions to the audience overlapping research interests and complementing areas of expertise could be identified.
A recurring hypothesis was that Open Data is a very powerful method to foster participation, accessibility, and collaboration across areas.
During the presentations the potential in the areas of research data in the digital humanities, the accessibility of educational resources and organization of educational infrastructures, and the participation in public administration and government became visible.
A recurring topic in the presentations was the need for collaboration among actors and stakeholders which arises the need for methodologies and systems for supporting the collaboration.
Asset for a potential future cooperation in this research area between the Brazilian and the German side were the mutually complementing interests and experiences of the groups.
The Brazilian side has an existing involvement with public administration, government, and education particularly with the special needs from a developing country perspective.
On the German side a strong background in the creation and operation of data management systems and infrastructures, as well as data integration exists.
We are currently in the process of establishing useful communication channels and collaboration platforms which allow efficient joint work across timezone, language, and continental borders, to foster the cooperation between the two groups.
For a common understanding of our interests and skills the first subject of collaboration is an common extended documentation of the initial workshop. Following this documentation a requirements engineering process will be started identify the concrete needs and potentials on both sides for a common project in future.
The second workshop planed in June 2019 will focus on the results of this discussion.

After the workshop we have also visited the DFG Office in Latin America to discuss possible research collaboration between German institutions and institutions in São Paulo.

The Open Data Management Workshop and the visit of the German delegation is funded by the German Research Foundation (DFG) in cooperation with the São Paulo Research Foundation (FAPESP) under grant agreement number 388784229.

Also read about our trip at the HTWK news portal (German).

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AskNow 0.1 Released

Dear all,

we are very happy to announce AskNow 0.1 – the initial release of Question Answering Components and Tools over RDF Knowledge Graphs.

Website: http://asknow.sda.tech/
Demo: http://asknowdemo.sda.tech
GitHub: https://github.com/AskNowQA

The following components with corresponding features are currently supported by AskNow:

  • AskNow UI 0.1: The UI interface works as a platform for users to pose their questions to the AskNow QA system. The UI displays the answers based on whether the answer is an entity or a list of entities, boolean or literal. For entities it shows the abstracts from DBpedia.
    Github: https://github.com/AskNowQA/AskNowUI

We want to thank everyone who helped to create this release, in particular the projects HOBBIT, SOLIDE, WDAqua, BigDataEurope.

View this announcement on Twitter: https://twitter.com/AskNowQA/status/1040205350853599233

Kind regards,
The AskNow Development Team
(http://asknow.sda.tech/people/)

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Jekyll RDF Tutorial Screencast

Since 2016 we are developing Jekyll-RDF a plugin for the famous Jekyll–static website generator. With Jekyll-RDF we took the slogan of Jekyll “Transform your plain text into static websites and blogs” and transformed it to “Transform your RDF Knowledge Graph into static websites and blogs”. This enables people without deep programming knowledge to publish data, which is encoded in complicated RDF structures, on the web in an easy to browse format.

To ease your start with Jekyll-RDF I’ve created a Tutorial Screencast that teaches you all the basics necessary to create a simple Jekyll page from an RDF knowledgebase. I hope that you enjoy it and that it is helpful for you!

crosspost: https://natanael.arndt.xyz/2018/08/07/jekyll-rdf-tutorial-screencast

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DBpedia Day @ SEMANTiCS 2018

Don’t miss the 12th edition of the DBpedia Community Meeting in Vienna, the city with the highest quality of life in the world. The DBpedia Community will get together for the DBpedia Day on September 10, the first day of the SEMANTiCS Conference which will be held from September 10 to 13, 2018.


What cool things do you do with DBpedia? Present your tools and datasets at the DBpedia Community Meeting! Please submit your presentations, posters, demos or other forms of contributions through our web form.


Highlights/Sessions

  • Keynote#1: Dealing with Open Domain Data by Javier David Fernández García (WU)
  • Keynote #2: Linked Open Data cloud – act now before it’s too late by Mathieu d’Aquin (NUI Galway)
  • DBpedia Showcase Session
  • DBpedia Association Hour
  • Special Chapter Session with DBpedia language chapters from different parts of Europe

Tickets

  • Attending the DBpedia Community Meeting costs €50 (excl. registration fee and VAT). DBpedia members get free admission. Please contact your nearest DBpedia chapter or the DBpedia Association for a promotion code.
  • Please check all details here!

We are looking forward to meeting you in Vienna!

 

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SANSA 0.4 (Semantic Analytics Stack) Released

We are happy to announce SANSA 0.4 – the fourth release of the Scalable Semantic Analytics Stack. SANSA employs distributed computing via Apache Spark and Flink in order to allow scalable machine learning, inference and querying capabilities for large knowledge graphs.

You can find the FAQ and usage examples at http://sansa-stack.net/faq/.

The following features are currently supported by SANSA:

  • Reading and writing RDF files in N-Triples, Turtle, RDF/XML, N-Quad format
  • Reading OWL files in various standard formats
  • Support for multiple data partitioning techniques
  • SPARQL querying via Sparqlify
  • Graph-parallel querying of RDF using SPARQL (1.0) via GraphX traversals (experimental)
  • RDFS, RDFS Simple, OWL-Horst, EL (experimental) forward chaining inference
  • Automatic inference plan creation (experimental)
  • RDF graph clustering with different algorithms
  • Terminological decision trees (experimental)
  • Anomaly detection (beta)
  • Knowledge graph embedding approaches: TransE (beta), DistMult (beta)

Noteworthy changes or updates since the previous release are:

  • Parser performance has been improved significantly e.g. DBpedia 2016-10 can be loaded in <100 seconds on a 7 node cluster
  • Support for a wider range of data partitioning strategies
  • A better unified API across data representations (RDD, DataFrame, DataSet, Graph) for triple operations
  • Improved unit test coverage
  • Improved distributed statistics calculation (see ISWC paper)
  • Initial scalability tests on 6 billion triple Ethereum blockchain data on a 100 node cluster
  • New SPARQL-to-GraphX rewriter aiming at providing better performance for queries exploiting graph locality
  • Numeric outlier detection tested on DBpedia (en)
  • Improved clustering tested on 20 GB RDF data sets

Deployment and getting started:

  • There are template projects for SBT and Maven for Apache Spark as well as for Apache Flink available to get started.
  • The SANSA jar files are in Maven Central i.e. in most IDEs you can just search for “sansa” to include the dependencies in Maven projects.
  • Example code is available for various tasks.
  • We provide interactive notebooks for running and testing code via Docker.

We want to thank everyone who helped to create this release, in particular the projects Big Data Europe, HOBBIT, SAKE, Big Data Ocean, SLIPO, QROWD, BETTER, BOOST and SPECIAL.

Spread the word by retweeting our release announcement on Twitter. For more updates, please view our Twitter feed and consider following us.

Greetings from the SANSA Development Team

 

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AKSW is organizing the 6th Leipzig Semantic Web Day (LSWT2018)

On June 18th 2018 we will have the 6th Leipzig Semantic Web Day (LSWT2018). A platform for regional actors to get in touch with each other regarding Semantic Web topics. This year we want to focus on e-government, e-commerce and digital humanities. It will be great.

We still have the possibility for more talks on the program. If you want to contribute by giving a presentation please contact Natanael Arndt with your title and an abstract until April 27th 2018.

If you want to participate, please register until May 25th 2018.

For more information please have a look at https://leds-projekt.de/lswt2018.html.



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SANSA 0.3 (Semantic Analytics Stack) Released

Dear all,

We are happy to announce SANSA 0.3 – the third release of the Scalable Semantic Analytics Stack. SANSA employs distributed computing via Apache Spark and Flink in order to allow scalable machine learning, inference and querying capabilities for large knowledge graphs.

You can find the FAQ and usage examples at http://sansa-stack.net/faq/.

The following features are currently supported by SANSA:

  • Reading and writing RDF files in N-Triples, Turtle, RDF/XML, N-Quad format
  • Reading OWL files in various standard formats
  • Support for multiple data partitioning techniques
  • SPARQL querying via Sparqlify (with some known limitations until the next Spark 2.3.* release)
  • SPARQL querying via conversion to Gremlin path traversals (experimental)
  • RDFS, RDFS Simple, OWL-Horst (all in beta status), EL (experimental) forward chaining inference
  • Automatic inference plan creation (experimental)
  • RDF graph clustering with different algorithms
  • Rule mining from RDF graphs based AMIE+
  • Terminological decision trees (experimental)
  • Anomaly detection (beta)
  • Distributed knowledge graph embedding approaches: TransE (beta), DistMult (beta), several further algorithms planned

Deployment and getting started:

  • There are template projects for SBT and Maven for Apache Spark as well as for Apache Flink available to get started.
  • The SANSA jar files are in Maven Central i.e. in most IDEs you can just search for “sansa” to include the dependencies in Maven projects.
  • There is example code for various tasks available.
  • We provide interactive notebooks for running and testing code via Docker.

We want to thank everyone who helped to create this release, in particular the projects Big Data Europe, HOBBIT, SAKE, Big Data Ocean, SLIPO, QROWD and BETTER.

Greetings from the SANSA Development Team

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DBpedia @ SEMANTiCS 2017

We are happy to invite you to the 10th DBpedia Community Meeting which will be held in Amsterdam. During the SEMANTiCS 2017, Sep 11-14, the DBpedia Community will get together on the 14th of September for the DBpdia Day.  

What cool things do you do with DBpedia? Present your tools and datasets at the DBpedia Community Meeting. Please submit your proposal in our form.

Highlights/Sessions

  • Keynote by Chris Welty (Google Research)
  • Keynote by Victor de Boer (VU University)
  • DBpedia Association Hour & Dutch DBpedia Hour
  • session on DBpedia ontology by members of the DBpedia ontology committee
  • DBpedia Tutorial Session (for people who want to learn about DBpedia)
  • We will talk with Mike Tung, CEO and founder from diffbot, about the DBpedia NLP department via videostream.

 Tickets

Attending the DBpedia Community Meeting costs €40 (excl. registration fee and VAT). DBpedia members get free admission, please contact your nearest DBpedia chapter or the DBpedia Association for a promotion code.  

Please check all details here.

Workshop

If you can’t stand it till the end of the SEMANTiCS, you can already participate in the workshop “Two worlds, one goal: A Reliable Linked Data ecosystem for media” held by DBpedia and Wolters Kluwer on the 11th of September. This half-day workshop aims at exploring major topics for publishers and libraries from DBpedia’s and Wolters Kluwer’s perspective. Therefore, both communities will dive into core areas like Interlinking, Metadata and Data Quality and address challenges such as fundamental requirements when publishing data on the web. Did we spark your interest? Check our detailed program here and get your ticket today.

We are looking forward to meeting you in Amsterdam!

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PRESS RELEASE: Amsterdam​ ​-​ ​this​ ​year’s​ ​hotspot​ ​​on Linked​ ​Data​ ​Strategies​ ​&​ ​Practices

SEMANTiCs LogoSeptember 11-14, 2017 international experts from science and industry demonstrate the business value of smart data services at SEMANTiCS 2017

Experts from science and industry meet at Europe’s biggest Linked Data and Semantic Web event to present and discuss latest achievements, challenges and future perspectives of new data management practices. The conference for Semantic Systems is now in its 13th edition and run by a mixed industry and research consortium built by Semantic Web Company (Austria), Institute for Applied Informatics (Germany), University of Applied Science St.Pölten (Austria) and the dutch partners VU, TNO and Kadaster, together with Wolters Kluwer as major industry sponsor.

Most companies and public administrations nowadays are struggling to catch up with new data management practices, either by initializing a data strategy from scratch or by adjusting their old strategy to the affordances of new technological environments, legal frameworks or business models. The Semantics conference gives insights into data management strategies, discusses cases of data-driven business models and gives advice on how to catch up with latest developments at the dawn of smart, networked data.

The exchange between industry and research is facilitated by a rich program consisting of six keynotes from companies like EA Games, Wolters Kluwer, and OTTO, followed by a total of 36 industry and 25 scientific presentations, 17 workshops, a poster and demo area and numerous social side events.

Programme​ ​Overview

September 11, 2017: Pre-Conference Workshops
September 12, 2017: Main Conference Day 1: Keynotes by Wolters Kluwer, EA Games and Toulouse Institute of Computer Science Research
September 13, 2017: Main Conference Day 2: Keynotes by OTTO & Ghent University
September 14, 2017: Post-Conference Workshops & DBpedia Day: Keynote by Chris Welty

This year’s conference focuses on the business value of Linked Data technologies and services as an enabling technology for a cost-efficient, flexible and sustainable enterprise data strategy.

This is addressed in the opening keynote of Sandeep Sacheti, Executive Vice President, Customer Information Management & Operational Excellence of Wolter Kluwer and in the management panel on Wednesday with Frank Tierolff (board member of Kadaster), Henk Jan Vink (director Networked Innovation of TNO), Kor Brandts (director DUO) and Michiel Borgers (Dutch Ministry of Finance).

The full and rich programme, with talks and presentations by leading researchers in the field and leading industry adopters, can be found at the conference page at http://2017.semantics.cc

SEMANTiCS​ ​2017​ ​Key​ ​Data

Date: 11-14 September 2017
Venue: Meervaart Theatre, Amsterdam, The Netherlands
Website: http://2017.semantics.cc
Programm: http://2017.semantics.cc/programme
Twitter: @semanticsconf
Contact: Dissemination Chair Arjen Santema
arjen.santema@kadaster.nl |+31 (0)652481774

View the full release here: PDF

Looking forward to see you at SEMANTiCs 2017.

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AKSW Colloquium, 01.09.2017, IDOL: Comprehensive & Complete LOD Insights

At the AKSW Colloquium on Friday 1st of September, at 10:40 AM there will be a paper presentation by Gustavo Publio. He will present the paper IDOL: Comprehensive & Complete LOD Insights, from Ciro Baron Neto, Dimitris Kontokostas, Amit Kirschenbaum, Gustavo Publio, Diego Esteves, and Sebastian Hellmann which will be presented in the upcoming SEMANTiCS’17 Conference in Amsterdam, Netherlands.

Abstract

“Over the last decade, we observed a steadily increasing amount of
RDF datasets made available on the web of data. The decentralized
nature of the web, however, makes it hard to identify all these
datasets. Even more so, when downloadable data distributions are
discovered, only insufficient metadata is available to describe the
datasets properly, thus posing barriers on its usefulness and reuse.
In this paper, we describe an attempt to exhaustively identify the
whole linked open data cloud by harvesting metadata from multiple
sources, providing insights about duplicated data and the general
quality of the available metadata. This was only possible by using a
probabilistic data structure called Bloom Filter. Finally, we published
a dump file containing metadata which can further be used to enrich
existent datasets.”

 

About the AKSW Colloquium

This event is part of a series of events about Semantic Web technology. Please see http://wiki.aksw.org/public/colloquium for further information about previous and future events. As always, Bachelor and Master students are able to get points for attendance and there are complimentary coffee and cake after the session.

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