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Manage Constraints
This topic describes the constraint components for Virtuoso Space-based Router.
Process rules, or constraints, specify conditions that must be met in order for a design to be correct. While many constraints are set by foundry and technology limitations, the Virtuoso space-based router also lets you define your own constraints and apply them to your designs.
There are three constraint components:
- Constraint Objects specify a particular type of constraint and provide a value for a single application of the constraint.
- Constraint Parameters specify additional qualifiers for applying a constraint.
- Constraint Groups and Multispecs let you apply a collection of constraints to specific objects in the design and the technology databases.
Each of these components has predefined or implicit constructs and a user customizable aspect.
Values for constraints and constraint parameters are described in
In addition to applying constraints to individual objects (nets, routes, terms, and area boundaries), you can also group objects and apply constraints to object groups.
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