(Apologies for crosspostings you may receive) Dear all, we are excited to publish the final program of the Workshop "Reference Extraction at the Intersection of AI Research and the Digital Humanities: Validation, Interoperability and Collaboration", to be held at the Max Planck Institute for Legal History and Legal Theory<https://www.lhlt.mpg.de/> (mpilhlt) in Frankfurt/Main on Tuesday, 4th Nov 2025. It is the second workshop in the "New Approaches for the Extraction of Heterogeneous Reference Data" series<https://mpilhlt.github.io/reference-extraction/> at mpilhlt started in 2023. This informal meeting is meant mainly to foster collaboration and knowledge exchange between researchers and practitioners working at the intersection of data extraction, artificial intelligence, and the digital humanities. In the workshop, we continue to address the challenge of extracting heterogeneous references from texts, particularly from historical documents and humanities or legal scholarship. This second workshop focuses on three key themes emerging from the 2023 discussions: 1. Validation: How can we evaluate and benchmark the performance of different reference extraction tools and approaches, particularly with large language models? 2. Interoperability: How can we ensure that different tools, datasets, and workflows can work together effectively through shared data models and formats? 3. Collaboration: How can researchers, developers, and institutions work together to advance the field of reference extraction? The program is attached and available online at: https://mpilhlt.github.io/reference-extraction/workshop-2025/programme/ The event will take place in-person and online. Please register at https://plan.events.mpg.de/e/refextract25 if you haven't done so already. A link for online attendance will be sent to registered participants before the event. Also, even if you cannot attend, but want to be informed about updates, materials being made available, etc. you can notify us about this at the registration link. We are looking forward to seeing you at the workshop! Christian Boulanger [email protected]<mailto:[email protected]> Andreas Wagner [email protected]<mailto:[email protected]> -- Andreas Wagner ORCiD: 0000-0003-1835-1653 Digital Humanities Max Planck Institute for Legal History and Legal Theory Hansaallee 41 D-60323 Frankfurt am Main Germany