Situation Models for Observing Human Activity

Many human activities follow a loosely defined script in which individuals assume roles. Encoding such scripts in a formal representation makes it possible to build systems that observe human activity in order to provide services. In this paper, we present a conceptual framework in which scripts for human activit y are described as scenarios composed of actors and objects within a network of situations. We provide formal definitions for the underlying concepts for situation models, and then propose a layered, component-based, software architecture model for constructing systems to observe human activity using such scripts.