Following, we will give you a brief retrospective about the tutorial. For further details of the presentations follow the link to the slides.

Session 1: DBpedia in a Nutshell

The tutorial was opened by Milan Dojchinovski (InfAI / DBpedia Association /  CTU in Prague) with the DBpedia in a Nutshell session. In a 45 min session Milan presented a DBpedia historical Wrap-up, explained how a DBpedia triple is born as well as demonstrated the power of SPARQL and the DBpedia KG.

Session 2: DBpedia Tech Stack

After a short break, Jan started the DBpedia Tech Stack Session by giving an overview about the DBpedia technology stack. Furthermore, he explained the use of DBpedia for Automatization and Data Pipeline Creation. This included an explanation of Databus, possible ways to automate data tasks and examples such as knowledge extraction and knowledge fusion. After that, he got to the creation of a simple data flow using the Databus. This was about creation of new data, publishing the data on the Databus, aggregation and usage in SPARQL service via docker.

Session 3: Deployment on corporate infrastructure

In the third session Johannes started by presenting technical details in relation to Databus like identifiers, DataIDs and Mods. He also addressed DBpedia Databus popular datasets, where to find DBpedia datasets, how the DBpedia KG partitions are organized as well as popular data collections. As the tutorial came to an end, he explained how to self-host critical services including creation of a custom copy of the latest-core collection, (i.e. a subset of the DBpedia KG) and how to set up a corporate Databus instance.

In case you missed the event, our presentation is also available on the DBpeda event page. Further insights, feedback and photos about the event are available on Twitter (#DBpediaTutorial hashtag).

Stay safe and check Twitter or LinkedIn. Furthermore, you can subscribe to our Newsletter for the latest news and information around DBpedia.

Yours DBpedia Association

The post Wrap Up: DBpedia Tutorial 2.0 @ Knowledge Graph Conference 2022 appeared first on DBpedia Association.

Following, we will give you a brief retrospective about the presentations. For further details of the presentations follow the link to the slides.

Opening

The tutorial which was held online was opened by Milan Dojchinovski (InfAI / DBpedia Association /  CTU in Prague) with some general information about the program of the tutorial, the scope and the technical information.

DBpedia in a Nutshell session

After the short opening, Milan continued with the first topic, the background on the DBpedia Association – how it all started and the evolution of DBpedia. Linked Data and the LOD cloud were also addressed as well as the mappings, extractors and data groups (e.g. mappings, generic, text, wikidata). Then Ontology was presented and explained. Milan concluded the first topic with information on the DBpedia SPARQL endpoint and DBpedia Databus platform.

Getting Started with DBpedia session

The next point on the program was split into two subtopics. First of all, Jan Forberg (InfAI / DBpedia Association) explained where to find data including DBpedia SPARQL endpoint, the DBpedia Databus platform as a repository for DBpedia and related datasets and the novel “collections” concept. Moreover, the DBpedia services such as DBpedia Lookup and DBpedia Spotlight were presented.

Afterwards Jan explained how to use the data hosted on the Databus. Starting by selecting particular artifacts, he explained the Docker container where data can be downloaded and a simple bash script to submit SPARQL and retrieve specific data artifacts.

Building National Knowledge Graphs using DBpedia Tech

In the following session, Johannes Frey (InfAI / DBpedia Association) explied how to build national knowledge graphs using DBpedia Tech. The use case of the Dutch National Knowledge Graph was explained as an example. The Dutch National Knowledge Graph was presented during the DBpedia Hackathon 2020. For further information feel free to have a look at the presentations of the Hackathon 2020 here https://tinyurl.com/kgia-2020-dnkg.  Please also see all relevant data here https://databus.dbpedia.org/dnkg/fusion/dutch-national-kg/. 

DBpedia Technology Stack

Talking about DBpedia Technology Stack, Jan started with the DBpedia Databus platform. He explained how the Databus platform works, the benefits (DatalDs and Simple Retrieval), the Databus SPARQL endpoints and the Web API and Maven Plugin. After that, Jan presented the Dockersized Services including DBpedia Virtuoso and DBpedia Plugin, DBpedia Spotlight (incl. use cases) and DBpedia Lookup.

Marvin Hofer (InfAI / DBpedia Association) then explained the DBpedia release process on the Databus and presented his work on debugging DBpedia and the DBpedia Mods technology. Marvin also explained the quality assurance process using the concept of  minidumps.

Afterwards, Johannes explained (Pre)fusion, ID management and the novel concept of cartridges.

Subsequently, Denis Streitmatter (InfAI / DBpedia Association) presented the DBpedia Archivo ontology manager and how to include your ontology here. He also explained various  use cases, e.g. how to find ontology, how to test your ontology and how to back it up. Then he presented the ontology tests 5 star schema and the SHACL based tests for ontologies. Please read the official DBpedia Archivo call here https://www.dbpedia.org/blog/dbpedia-archivo-call-to-improve-the-web-of-ontologies/. 

Contributions to DBpedia

As it got to the end of the tutorial, Milan explained how to improve mappings or introduce new mappings. He talked about improvement of the DBpedia Information Extraction Framework as well as contributing DBpedia tests. Then he explained about contributing mappings and links for knowledge cartridges and how to write Mods for the Databus.

In case you missed the event, our presentation is also available on the DBpeda event page. Further insights, feedback and photos about the event are available on Twitter (#DBpediaTutorial hashtag).

We are now looking forward to the next DBpedia tutorial, which will be held on September 1, 2021 co-located with the LDK conference in Zaragoza, Spain. Check more details here and register now! Furthermore, we will organize the DBpedia Day on September 9, 2021 at the Semantics Conference in Amsterdam. We are looking forward to meeting all Dutch DBpedians there! 

Stay safe and check Twitter or LinkedIn. Furthermore, you can subscribe to our Newsletter for the latest news and information around DBpedia.

Yours DBpedia Association

The post Wrap Up: DBpedia Tech Tutorial @ Knowledge Graph Conference 2021 appeared first on DBpedia Association.

DBpedia Autumn Hackathon and the KGiA Conference

From September 21st to October 1st, 2020 we organized the first Autumn Hackathon. We invited all community members to join and contribute to this new format. You had the chance to experience the latest technology provided by the DBpedia Association members. We hosted special member tracks, a Dutch National Knowledge Graph Track and a track to improve DBpedia. Results were presented at the final hackathon event on October 5, 2020. We uploaded all contributions on our Youtube channel. Many thanks for all your contributions and invested time!

The Knowledge Graphs in Action event

The SEMANTiCS Onsite Conference 2020 had to be postponed till September 2021. To bridge the gap until 2021, we took the opportunity to organize the Knowledge Graphs in Action online track as a SEMANTiCS satellite event on October 6, 2020. This new online conference is a combination of two existing events: the DBpedia Community Meeting, which is regularly held as part of the SEMANTiCS, and the annual Spatial Linked Data conference organised by EuroSDR and the Platform Linked Data Netherlands. We glued it together and as a bonus we added a track about Geo-information Integration organized by EuroSDR. As special joint sessions we presented four keynote speakers. More than 130 knowledge graph enthusiasts joined the KGiA event and it was a great success for the organizing team. Do you miss the event? No problem! We uploaded all recorded sessions on the DBpedia youtube channel.

KnowConn Conference 2020

Our CEO, Sebastian Hellmann, gave the talk ‘DBpedia Databus – A platform to evolve knowledge and AI from versioned web files’ on December 2, 2020 at the KnowledgeConnexions Online Conference. It was a great success and we received a lot of positive and constructive feedback for the DBpedia Databus. If you missed his talk and looking for Sebastians slides, please check here: http://tinyurl.com/connexions-2020

DBpedia Archivo – Call to improve the web of ontologies

On December 7, 2020 we introduced the DBpedia Archivo – an augmented ontology archive and interface to implement FAIRer ontologies. Each ontology is rated with 4 stars measuring basic FAIR features. We would like to call on all ontology maintainers and consumers to help us increase the average star rating of the web of ontologies by fixing and improving its ontologies. You can easily check an ontology at https://archivo.dbpedia.org/info. Further infos on how to help us are available in a detailed post on our blog. 

Member features on the blog

At the beginning of November 2020 we started the member feature on the blog. We gave DBpedia members the chance to present special products, tools and applications. We published several posts in which DBpedia members, like Ontotext, GNOSS, the Semantic Web Company, TerminusDB or FinScience shared unique insights with the community. In the beginning of 2021 we will continue with interesting posts and presentations. Stay tuned!

We do hope we will meet you and some new faces during our events next year. The DBpedia Association wants to get to know you because DBpedia is a community effort and would not continue to develop, improve and grow without you. We plan to have meetings in 2021 at the Knowledge Graph Conference, the LDK conference in Zaragoza, Spain and the SEMANTiCS conference in Amsterdam, Netherlands.

Happy New Year to all of you! Stay safe and check Twitter, LinkedIn and our Website or subscribe to our Newsletter for the latest news and information.

Yours,

DBpedia Association

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