Model Diagram Level Constraint.
| Constant | Value | Description | 
|---|---|---|
| esriModelDiagramLevelConstraintNone | 0 | No level constraint. | 
| esriModelDiagramLevelConstraintTowardsInput | 1 | Level constraint towards input. | 
| esriModelDiagramLevelConstraintTowardsOutput | 2 | Level constraint towards output. | 
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.