  We propose an interpretation of multiparty sessions with asynchronous
communication as Flow Event Structures. We introduce a new notion of global
type for asynchronous multiparty sessions, ensuring the expected properties for
sessions, including progress. Our global types, which reflect asynchrony more
directly than standard global types and are more permissive, are themselves
interpreted as Prime Event Structures. The main result is that the Event
Structure interpretation of a session is equivalent, when the session is
typable, to the Event Structure interpretation of its global type.
