WG1 
Producers
WG1 is concerned with how knowledge graphs can be made available from various sources, systems and formats, in a scalable, serviceable, distributed, and FAIR (Findable, Accessible, Interoperable, and Reusable) manner. The WG will define requirements and explore ideas, methods, and tools to make FAIR distributed knowledge graphs, with special attention as to whether the data are offline or online, and what to do when the data are privacy-sensitive.

Join the WG1 Provider mailing list (cost-dkg-wg1@lists.kit.ed) by sending an email to sympa@lists.kit.edu with subject "SUBSCRIBE cost-dkg-wg1 <Firstname> <Lastname>" (filling in the variables for first and last name).
WG2 
Consumers
Bringing together actors dealing with data processing techniques and user-facing solutions, having in common the need for being able to consume data made available by providers. This task will enable data consumers to test and improve their tools and techniques on datasets made available by data providers, and also highlight ways of improving the usability of exposed datasets. This task is concerned with test matching algorithms, interlinking of Distributed Knowledge Graphs for easier integration, and metadata/context/logical deduction use to better determine what KGs are about, what to do with them and what decision to take from them.

Join the WG2 Consumer mailing list (project-dkg-wg2@lists.fau.de) by filling in this form.
WG3 
Prosumers
Prosumers are entities that act as both consumers and providers of data. If sometimes the two roles of prosumers (producers and users) can be dealt with separately, in some cases they are very intertwined: prosumers have specific needs and requirements. WG3 is particularly interested in: 1) replication hubs which consume and publish identically to help balancing load; 2) refinement tasks that consume and improve data; 3) data catalogues that bring together data sets and add metadata on top; 4) provenance tracking that produces complementary information from what is consumed to improve explainability of data processing.

Join the WG3 Prosumer mailing list (cost-dkg-wg3@listes.emse.fr) by sending an email to sympa@listes.emse.fr with subject: "SUBSCRIBE cost-dkg-wg3 <Firstname> <Lastname>" (filling in the variables for first and last name).
WG4 
Systems
Taking a holistic view on systems built from multiple consumers, prosumers, and providers of Distributed Knowledge Graphs. This task investigates issues that stem from the interplay of consumers, prosumers, and providers of Distributed Knowledge Graphs, and coordinates information regarding new developments made in all aspects of Distributed Knowledge Graphs in/outside the consortium.

Join the WG4 Systems mailing list (cost-dkgs-wg4@lists.liu.se) by filling in this form.