Connection properties
Structural visual properties of a connection (the rendered form of a relation on a map).
Line style
Three options for how the connection line is drawn:
- Curved — a bezier curve between the two elements
- Straight — a direct straight line
- Elbow — right-angle routing (lines that turn at 90°, like flowchart connectors)
Configurable per connection, or set globally in the Styles panel.
Directionality
Whether a relation has a direction, and which direction.
Four states:
- Undirected — A — B. No arrow. The relation has no inherent direction.
- Bidirectional — A ↔ B. Arrows on both ends.
- A → B — one-way, from A to B.
- B → A — one-way, from B to A.
Directionality is a property of the Relation entity. It determines how the connection is rendered (arrowhead placement) and may carry semantic meaning in the user’s model.