# Parameter.h File Reference

`#include <FdoStd.h>`
`#include <Fdo/Expression/ValueExpression.h>`

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## Classes
class | FdoParameter
| The FdoParameter class derives from FdoValueExpression and represents a substitution parameter in the expression. FdoParameters are represented by a name: when expressions are evaluated, the caller must supply a value to be bound to each parameter name. More...