---
title: NSEntityMappingType.undefinedEntityMappingType
framework: coredata
role: symbol
role_heading: Case
path: coredata/nsentitymappingtype/undefinedentitymappingtype
---

# NSEntityMappingType.undefinedEntityMappingType

Specifies that the developer handles destination instance creation.

## Declaration

```swift
case undefinedEntityMappingType
```

## See Also

### Constants

- [NSEntityMappingType.customEntityMappingType](coredata/nsentitymappingtype/customentitymappingtype.md)
- [NSEntityMappingType.addEntityMappingType](coredata/nsentitymappingtype/addentitymappingtype.md)
- [NSEntityMappingType.removeEntityMappingType](coredata/nsentitymappingtype/removeentitymappingtype.md)
- [NSEntityMappingType.copyEntityMappingType](coredata/nsentitymappingtype/copyentitymappingtype.md)
- [NSEntityMappingType.transformEntityMappingType](coredata/nsentitymappingtype/transformentitymappingtype.md)