Jusletter IT

rOWLer – A Hybrid Rule Engine for Legal Reasoning

  • Author: Johannes Scharf
  • Category: Articles
  • Region: Austria
  • Field of law: Advanced Legal Informatics Systems and Applications
  • Collection: Conference Proceedings IRIS 2015
  • Citation: Johannes Scharf, rOWLer – A Hybrid Rule Engine for Legal Reasoning, in: Jusletter IT 26 February 2015
In this paper rOWLer, a hybrid rule engine for legal reasoning is presented. The engine combines the expressiveness of rules and ontologies to enable legal reasoning – hence the name «rOWLer». It is tailored for use in public administration (tax law, pension law, social benefits law, etc.) and provides a flexible architecture, in particular concerning amendments, which allows for adaption to different requirements.

Table of contents

  • 1. Introduction
  • 1.1. Motivation
  • 2. Architecture
  • 3. Reasoning module and algorithm
  • 4. Temporal model and reasoning
  • 4.1. Theoretical background
  • 4.2. Versioning model
  • 4.2.1. Temporal dimensions
  • 4.2.2. Versioning legal rules
  • 4.2.3. Retroactive modifications
  • 4.3. Selecting applicable rules
  • 5. Modelling norms
  • 5.1. Presenting rule priorities
  • 6. Related work
  • 7. Conclusions and future work
  • 8. References

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