---
title: kCMMetadataDataTypeRegistryError_DataTypeAlreadyRegistered
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmmetadatadatatyperegistryerror_datatypealreadyregistered
---

# kCMMetadataDataTypeRegistryError_DataTypeAlreadyRegistered

An error that indicates the datatype is in a registered state.

## Declaration

```swift
var kCMMetadataDataTypeRegistryError_DataTypeAlreadyRegistered: OSStatus { get }
```

## See Also

### Constants

- [kCMMetadataDataTypeRegistryError_AllocationFailed](coremedia/kcmmetadatadatatyperegistryerror_allocationfailed.md)
- [kCMMetadataDataTypeRegistryError_BadDataTypeIdentifier](coremedia/kcmmetadatadatatyperegistryerror_baddatatypeidentifier.md)
- [kCMMetadataDataTypeRegistryError_MultipleConformingBaseTypes](coremedia/kcmmetadatadatatyperegistryerror_multipleconformingbasetypes.md)
- [kCMMetadataDataTypeRegistryError_RequiredParameterMissing](coremedia/kcmmetadatadatatyperegistryerror_requiredparametermissing.md)
- [kCMMetadataDataTypeRegistryError_RequiresConformingBaseType](coremedia/kcmmetadatadatatyperegistryerror_requiresconformingbasetype.md)