---
title: "init(inputMetaParameterDefinition:envelope:identifier:)"
framework: phase
role: symbol
role_heading: Initializer
path: "phase/phasemappedmetaparameterdefinition/init(inputmetaparameterdefinition:envelope:identifier:)"
---

# init(inputMetaParameterDefinition:envelope:identifier:)

Creates a specification for a named metaparameter that the app plots on a graph defined by the given set of curves.

## Declaration

```swift
convenience init(inputMetaParameterDefinition: PHASENumberMetaParameterDefinition, envelope: PHASEEnvelope, identifier: String)
```

## Parameters

- `inputMetaParameterDefinition`: A metaparameter that contains an input value.
- `envelope`: A set of curves that graph the input value.
- `identifier`: A unique name for the metaparameter specification.

## See Also

### Creating a Mapped Metaparameter

- [init(inputMetaParameterDefinition:envelope:)](phase/phasemappedmetaparameterdefinition/init(inputmetaparameterdefinition:envelope:).md)