🔎 Open-Source Spotlight: HeFQUIN Knowledge graphs in different systems? Query them together with SPARQL, without copying everything into one database. From @olafhartig.bsky.social and colleagues. openknowledgegraphs.com/software/hef... #KnowledgeGraphs #SPARQL

HeFQUIN - Open Knowledge Graphs

HeFQUIN is a query federation engine for heterogeneous federations of graph data sources, including federations of knowledge graphs.

openknowledgegraphs.com

I'm happy about having received the Best Demo Paper Award 🏆 at the European Semantic Web Conference (ESWC). This is for a paper about the extension of our query federation engine HeFQUIN with the capability to integrate virtual knowledge views of data from Web/REST APIs as federation members.

📣 Postdoc position on Virtual Knowledge Graph Integration at Linköping University I'm looking for a postdoc to actively lead research in two complementary projects on foundations & techniques for querying federations of KG views of heterogeneous data sources. 👉 Further info: liu.se/en/work-at-l...

Finally, our VLDB paper is out: "Exploring Exploratory Querying." — A research vision related to a new way of querying, including new types of users. vldb.org/pvldb/volume... This paper is the result of discussions we had during a Shonan meeting late last year.

@olafhartig.bsky.social och hans forskargrupp har en vision om att man ska kunna samla information som i dag ligger utspridd på webben inom en organisation. Det ska ske virtuellt, så att varje aktör behåller kontrollen över sin egen information #forskning #vetenskap tinyurl.com/z9ds5ku8

Nyckeln till framtidens smarta informationshantering | Knut och Alice Wallenbergs Stiftelse

En stor mängd av den information som företag, myndigheter eller konsumenter behöver komma åt ligger i dag utspridd på nätet hos olika aktörer. Av olika skäl är det inte alltid möjligt att slå samman o...

tinyurl.com

@olafhartig.bsky.social and his #research team have a vision that we should be able to bring together information that is currently scattered across the Web by integrating the info virtually so that each player retains control over their own information #science @liu.se tinyurl.com/yssef6u3

The key to smart information management | Knut and Alice Wallenberg Foundation

Much of the information that businesses, public agencies or consumers need to access is currently in the hands of multiple players spread across the Internet. For various reasons, it is not always pos...

tinyurl.com

Super glad to receive the Best Research Paper Award at #ESWC2025 together with Sitt Min Oo for our work on providing a formal foundation for mapping languages for Knowledge Graph construction.

The @liu.se Semantic Web gang at the #ESWC2025 conference.

Related to our approach to represent and to query lists as composite values in RDF-based Knowledge Graphs, I developed a tool to convert RDF files in which lists are represented as RDF collections (rdf:List) into files that use our cdt:List approach. Repo and download: github.com/hartig/SPARQ...

Researching graph databases, SPARQL engines, or stores for Knowledge Graphs? Submit to TGDK Special Issue: Data Management for (Knowledge) Graphs. Deadline July 1st, 2025. Resources, experience reports and extended workshop/conference papers welcome. CfP: bit.ly/4luAUXZ

So far, declarative mapping languages for knowledge graph construction (RML and the likes) have lacked a solid formal foundation 😶‍🌫️ ⚡ Our latest work, accepted for #ESWC2025, changes that: We introduce an algebra for mappings, provide a formal semantics for RML, and more. 🔎 arxiv.org/abs/2503.10385

An Algebraic Foundation for Knowledge Graph Construction (Extended Version)

Although they exist since more than ten years already, have attracted diverse implementations, and have been used successfully in a significant number of applications, declarative mapping languages fo...

arxiv.org

📣 We are looking to expand the Program Committee for this year's CoopIS conference and are calling for self- nominations. If interested, please nominate yourself: forms.gle/CYGYkeqVDBLR... ✍️ ℹ️ More info about CoopIS'25, the 31st Int. Conf. on Cooperative Information Systems: coopis.scitevents.org

CoopIS, 31st Int'l. Conf. on Cooperative Information Systems

Knowledge Graphs, Data, Information, and Knowledge Engineering, Inductive Learning, Machine-Learning and Knowledge Discovery, Process Analytics and Technology, Semantic Interoperability and Open Standards, Human-centric Security and Privacy in Information Systems, Internet of Things and Digital Twins, Architecture and Management of Information Systems, Human Aspects and Social Interaction in Information Systems, Services and Cloud in Information Systems, Applications of Human-centric Information Systems in a Digital World, Software Engineering for Information Systems

coopis.scitevents.org

In a recent #Dagstuhl seminar we developed a research roadmap towards Computer-Using Personal Agents (CUPAs), automating complex tasks like today's Computer-Using Agents, but including context via controlled access to personal knowledge graphs. Our vision paper: openaccess.city.ac.uk/id/eprint/34...

I just saw that DBLP (@dblp.org) has recently started to provide a public query service for everyone to run SPARQL queries over their database with information about computer science publications. Each author page includes links to relevant example queries. Very nice! blog.dblp.org/2024/09/09/i...

Thank you all for a great week in #Dagstuhl, here's the traditional photo 😉 www.dagstuhl.de/25051

Katja Hose@katjahose.bsky.social · 2y ago

On the way to #dagstuhl. Looking forward to a great week discussing "Trust and Accountability in Knowledge Graph-Based AI for Self Determination". Thank you, John Domingue, Luis-Daniel Ibáñez, Sabrina Kirrane, Maria-Esther Vidal for organizing the seminar!

Arrived at Castle Dagstuhl for a week of discussions around "Trust and Accountability in Knowledge Graph-Based AI for Self Determination" www.dagstuhl.de/25051

Interested in translating from the recently-standardized graph database language GQL to Gremlin ? Next Monday (Nov.25), the Tinkerpop community has a talk for you. discord.gg/tinkerpop?ev...

Join the Apache TinkerPop Discord Server!

Apache TinkerPop is an open source graph computing framework and the home of the Gremlin graph query language. | 1333 members

discord.gg

I have heard the waters here are calmer. Ready to start new.