XHAILe: Explainable Hybrid AI for Computational Law and Accurate Legal Chatbots

Thomas Hildebrandt; Hugo-Andrés López-Acosta; Konstantinos Varvoutas; Henrik Palmer Olsen; Marieke Anne Heyl; Manex Aguirrezabal Zabaleta; Bolette Pedersen; Daniel  Hershcovich; Ilias Chalkidis; Ali Mohammed Ali Al-Laith; Amogh Raina; Tilman Zuckmantel; Morten Marquard; Søren Debois; Håkon Normann; Leif Storgaard; Ghita Thiesen; Jim Foli; Jakob Eiby

XHAILe: Explainable Hybrid AI for Computational Law and Accurate Legal Chatbots

Thomas Hildebrandt^*
, Hugo-Andrés López-Acosta^*
, Konstantinos Varvoutas
, Henrik Palmer Olsen
, Marieke Anne Heyl
, Manex Aguirrezabal Zabaleta
, Bolette Pedersen
, Daniel Hershcovich
, Ilias Chalkidis
, Ali Mohammed Ali Al-Laith
, Amogh Raina
, Tilman Zuckmantel
, Morten Marquard
, Søren Debois
, Håkon Normann
, Leif Storgaard
, Ghita Thiesen
, Jim Foli
, Jakob Eiby

^*Corresponding author for this work

University of Copenhagen
DCR Solutions A/S
Tieto Sweden AB
Local Government Denmark

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

The XHAILe Grand Solutions project brings together leading Danish researchers in law, language technology, AI and computational law and providers of digital public administration and legal tech software, to develop accurate and explainable Hybrid-AI solutions that combine efficient AI-based translation of law to an open computational law rule format and a conversational agent using a rule engine via an open API. Here come trustworthy, new legal benchmarks and guidelines for the use of the technology. The results will be evaluated and demonstrated on use cases from local and central government.

Original language	English
Title of host publication	Proceedings of the 38th edition of the International Conference on Advanced Information Systems Engineering (CAiSE'26)
Number of pages	12
Publisher	CEUR-WS
Publication status	Accepted/In press - 2026
Event	38th edition of the International Conference on Advanced Information Systems Engineering - Verona, Italy Duration: 8 Jun 2026 → 12 Jun 2026

Conference

Conference	38th edition of the International Conference on Advanced Information Systems Engineering
Country/Territory	Italy
City	Verona
Period	08/06/2026 → 12/06/2026

Keywords

Hybrid AI
Computational Law
Legal Chatbots
DCR Graphs
NLP
LLM
eGovernment

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Hildebrandt, T., López-Acosta, H.-A., Varvoutas, K., Olsen, H. P., Heyl, M. A., Zabaleta, M. A., Pedersen, B., Hershcovich, D., Chalkidis, I., Al-Laith, A. M. A., Raina, A., Zuckmantel, T., Marquard, M., Debois, S., Normann, H., Storgaard, L., Thiesen, G., Foli, J., & Eiby, J. (Accepted/In press). XHAILe: Explainable Hybrid AI for Computational Law and Accurate Legal Chatbots. In Proceedings of the 38th edition of the International Conference on Advanced Information Systems Engineering (CAiSE'26) CEUR-WS.

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title = "XHAILe: Explainable Hybrid AI for Computational Law and Accurate Legal Chatbots",

abstract = "The XHAILe Grand Solutions project brings together leading Danish researchers in law, language technology, AI and computational law and providers of digital public administration and legal tech software, to develop accurate and explainable Hybrid-AI solutions that combine efficient AI-based translation of law to an open computational law rule format and a conversational agent using a rule engine via an open API. Here come trustworthy, new legal benchmarks and guidelines for the use of the technology. The results will be evaluated and demonstrated on use cases from local and central government.",

keywords = "Hybrid AI, Computational Law, Legal Chatbots, DCR Graphs, NLP, LLM, eGovernment",

author = "Thomas Hildebrandt and Hugo-Andr{\'e}s L{\'o}pez-Acosta and Konstantinos Varvoutas and Olsen, \{Henrik Palmer\} and Heyl, \{Marieke Anne\} and Zabaleta, \{Manex Aguirrezabal\} and Bolette Pedersen and Daniel Hershcovich and Ilias Chalkidis and Al-Laith, \{Ali Mohammed Ali\} and Amogh Raina and Tilman Zuckmantel and Morten Marquard and S{\o}ren Debois and H{\aa}kon Normann and Leif Storgaard and Ghita Thiesen and Jim Foli and Jakob Eiby",

year = "2026",

language = "English",

booktitle = "Proceedings of the 38th edition of the International Conference on Advanced Information Systems Engineering (CAiSE'26)",

publisher = "CEUR-WS",

note = "38th edition of the International Conference on Advanced Information Systems Engineering, CAiSE ; Conference date: 08-06-2026 Through 12-06-2026",

}

Hildebrandt, T, López-Acosta, H-A , Varvoutas, K, Olsen, HP, Heyl, MA, Zabaleta, MA, Pedersen, B, Hershcovich, D, Chalkidis, I, Al-Laith, AMA, Raina, A, Zuckmantel, T, Marquard, M, Debois, S, Normann, H, Storgaard, L, Thiesen, G, Foli, J & Eiby, J 2026, XHAILe: Explainable Hybrid AI for Computational Law and Accurate Legal Chatbots. in Proceedings of the 38th edition of the International Conference on Advanced Information Systems Engineering (CAiSE'26). CEUR-WS, 38th edition of the International Conference on Advanced Information Systems Engineering, Verona, Italy, 08/06/2026.

XHAILe: Explainable Hybrid AI for Computational Law and Accurate Legal Chatbots. / Hildebrandt, Thomas; López-Acosta, Hugo-Andrés ; Varvoutas, Konstantinos et al.
Proceedings of the 38th edition of the International Conference on Advanced Information Systems Engineering (CAiSE'26). CEUR-WS, 2026.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - XHAILe: Explainable Hybrid AI for Computational Law and Accurate Legal Chatbots

AU - Hildebrandt, Thomas

AU - López-Acosta, Hugo-Andrés

AU - Varvoutas, Konstantinos

AU - Olsen, Henrik Palmer

AU - Heyl, Marieke Anne

AU - Zabaleta, Manex Aguirrezabal

AU - Pedersen, Bolette

AU - Hershcovich, Daniel

AU - Chalkidis, Ilias

AU - Al-Laith, Ali Mohammed Ali

AU - Raina, Amogh

AU - Zuckmantel, Tilman

AU - Marquard, Morten

AU - Debois, Søren

AU - Normann, Håkon

AU - Storgaard, Leif

AU - Thiesen, Ghita

AU - Foli, Jim

AU - Eiby, Jakob

PY - 2026

Y1 - 2026

N2 - The XHAILe Grand Solutions project brings together leading Danish researchers in law, language technology, AI and computational law and providers of digital public administration and legal tech software, to develop accurate and explainable Hybrid-AI solutions that combine efficient AI-based translation of law to an open computational law rule format and a conversational agent using a rule engine via an open API. Here come trustworthy, new legal benchmarks and guidelines for the use of the technology. The results will be evaluated and demonstrated on use cases from local and central government.

AB - The XHAILe Grand Solutions project brings together leading Danish researchers in law, language technology, AI and computational law and providers of digital public administration and legal tech software, to develop accurate and explainable Hybrid-AI solutions that combine efficient AI-based translation of law to an open computational law rule format and a conversational agent using a rule engine via an open API. Here come trustworthy, new legal benchmarks and guidelines for the use of the technology. The results will be evaluated and demonstrated on use cases from local and central government.

KW - Hybrid AI

KW - Computational Law

KW - Legal Chatbots

KW - DCR Graphs

KW - NLP

KW - LLM

KW - eGovernment

M3 - Article in proceedings

BT - Proceedings of the 38th edition of the International Conference on Advanced Information Systems Engineering (CAiSE'26)

PB - CEUR-WS

T2 - 38th edition of the International Conference on Advanced Information Systems Engineering

Y2 - 8 June 2026 through 12 June 2026

ER -

XHAILe: Explainable Hybrid AI for Computational Law and Accurate Legal Chatbots

Abstract

Conference

Keywords

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