Story Generation in PDDL Using Character Moods: A Case Study on Iliad's First Book

In this paper we look into a simple approach for generating character-based stories using planning and the language of PDDL. A story often involves modalities over properties and objects, such as what the characters believe, desire, request, etc. We look into a practical approach that reifies such modalities into normal objects of the planning domain, and relies on a "mood" predicate to represent the disposition of characters based on these objects. A short story is then generated by specifying a goal for the planning problem expressed in terms of the moods of the characters of the story. As a case study of how such a domain for story generation is modeled, we investigate the story of the first book of Homer's Iliad as a solution of an appropriate PDDL domain and problem description.