diagramtype

Diagramtype is a metadata label used in diagramming systems to classify the kind of diagram represented. It serves as a categorical indicator that informs how data should be interpreted, validated, and rendered within a given editor, renderer, or API. In practice, diagramtype is often implemented as an enumeration or a string field attached to a diagram object.

Common values for diagramtype cover a wide range of diagram families, such as flowchart, UML class diagram, sequence diagram, ER diagram, mind map, organizational chart, Gantt chart, timeline, and network diagram. The exact set of allowed values depends on the software or library, and many systems support custom or user-defined types to accommodate domain-specific diagrams.

The diagramtype value typically governs rendering rules, layout algorithms, and interaction models. For example, a flowchart may rely on process and decision shapes and edge routing that emphasizes flow, while a UML class diagram focuses on entities, attributes, and relationships with a static structure. Some tools also use diagramtype to enforce data constraints, such as required fields for a given type, or to enable type-specific editing features.

Extensibility is a common design consideration. New diagram types can be added to accommodate evolving visualization needs, but may require migration rules to translate existing data to compatible formats. See also diagram, visualization, and data modeling.