| Interface | Description | 
|---|---|
| Expression | 
 
 An expression can be used for, e.g. 
 | 
| ExpressionBuilder | 
 
 This interface provides methods to build a single expression consisting of PolyScope entities, such as
 variables, Features, I/Os and/or waypoints, as well as string parts. 
 | 
| Exception | Description | 
|---|---|
| InvalidExpressionException | 
 
 This exception is thrown if an expression is invalid. 
 | 
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