---
title: CMIOExtensionPropertyAttributes
framework: coremediaio
role: symbol
role_heading: Class
path: coremediaio/cmioextensionpropertyattributes
---

# CMIOExtensionPropertyAttributes

An object that describes the attributes of a property.

## Declaration

```swift
class CMIOExtensionPropertyAttributes<ObjectType> where ObjectType : AnyObject
```

## Overview

Overview Use a property attributes object to describe attributes such as the minimum and maximum values, discrete values, and read-only values.

## Topics

### Creating Property Attributes

- [init(minValue:maxValue:validValues:readOnly:)](coremediaio/cmioextensionpropertyattributes/init(minvalue:maxvalue:validvalues:readonly:).md)

### Inspecting Attributes

- [isReadOnly](coremediaio/cmioextensionpropertyattributes/isreadonly.md)
- [minValue](coremediaio/cmioextensionpropertyattributes/minvalue.md)
- [maxValue](coremediaio/cmioextensionpropertyattributes/maxvalue.md)
- [validValues](coremediaio/cmioextensionpropertyattributes/validvalues.md)

### Specifying a Read-Only Attribute

- [readOnlyPropertyAttribute](coremediaio/cmioextensionpropertyattributes/readonlypropertyattribute.md)

### Initializers

- [init(coder:)](coremediaio/cmioextensionpropertyattributes/init(coder:).md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)

## See Also

### Properties

- [CMIOExtensionProperty](coremediaio/cmioextensionproperty.md)
- [CMIOExtensionPropertyState](coremediaio/cmioextensionpropertystate.md)
- [CMIOExtensionInfoDictionaryKey](coremediaio/cmioextensioninfodictionarykey.md)
- [CMIOExtensionMachServiceNameKey](coremediaio/cmioextensionmachservicenamekey.md)