Diagrammatic representation of data types and data manipulations in a combined data- and control-flow language

Many visual languages only support data of predefined types. For fine-grain general-purpose visual languages based on the data-flow paradigm, there is the need to describe various data structures that will represent the structure of the data that flows in various parts of a graph. In this paper we describe our design of various static and dynamic data structure constructs, a visual formalism to describe data types and a visual representation of manipulations of data structures.