Dynamic Epistemic Logic with ASP Updates: Application to Conditional Planning
This is an incremental improvement for researchers in epistemic planning, offering a more expressive action representation.
The paper tackles the problem of representing actions in Dynamic Epistemic Logic (DEL) for planning by introducing DEL[ASP], where actions are described using Answer Set Programming (ASP) instead of event models, and demonstrates its application to conditional planning in partially observable domains.
Dynamic Epistemic Logic (DEL) is a family of multimodal logics that has proved to be very successful for epistemic reasoning in planning tasks. In this logic, the agent's knowledge is captured by modal epistemic operators whereas the system evolution is described in terms of (some subset of) dynamic logic modalities in which actions are usually represented as semantic objects called event models. In this paper, we study a variant of DEL, that wecall DEL[ASP], where actions are syntactically described by using an Answer Set Programming (ASP) representation instead of event models. This representation directly inherits high level expressive features like indirect effects, qualifications, state constraints, defaults, or recursive fluents that are common in ASP descriptions of action domains. Besides, we illustrate how this approach can be applied for obtaining conditional plans in single-agent, partially observable domains where knowledge acquisition may be represented as indirect effects of actions.