On Qualitative Route Descriptions: Representation, Agent Models, and Computational Complexity

Matthias Westphal*, Stefan Wölfl, Bernhard Nebel, Jochen Renz

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review


    The generation of route descriptions is a fundamental task of navigation systems. A particular problem in this context is to identify routes that can easily be described and processed by users. In this work, we present a framework for representing route networks with the qualitative information necessary to evaluate and optimize route descriptions with regard to ambiguities in them. We identify different agent models that differ in how agents are assumed to process route descriptions while navigating through route networks and discuss which agent models can be translated into PDL programs. Further, we analyze the computational complexity of matching route descriptions and paths in route networks in dependency of the agent model. Finally, we empirically evaluate the influence of the agent model on the optimization and the processing of route instructions.

    Original languageEnglish
    Pages (from-to)177-201
    Number of pages25
    JournalJournal of Philosophical Logic
    Issue number2
    Publication statusPublished - 8 Apr 2015


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