---
title: DeclarationBase
framework: Device Management
role: symbol
role_heading: Object
platforms: [iOS 15.0+, iPadOS 15.0+, Mac Catalyst 15.0+, macOS 13.0+, tvOS 16.0+, visionOS 1.1+, watchOS 10.0+]
path: devicemanagement/declarationbase
---

# DeclarationBase

Keys common to all declarations used with the Remote Management protocol.

## Declaration

```data
object DeclarationBase
```

## Properties

Identifier: A string uniquely identifying this declaration. The size of this string shouldn’t exceed 64 octets. A UUID string value is a good choice. Payload: The payload describing this declaration. ServerToken: A unique token generated by the server specifying a particular revision of the declaration. The size of this string shouldn’t exceed 64 octets. Type: A string specifying the type of this declaration.

## Discussion

Discussion Reason Codes Error.ActivationFailed: A configuration or asset cannot be activated due to an activation that failed. Identifier: (string) The Identifier of the declaration. ServerToken: (string) The ServerToken of the declaration. Error.AssetCannotBeDeserialized: The asset data does not conform to the expected data type. Error: (string) Description of the underlying NSError. Error.AssetCannotBeDownloaded: The asset data cannot be downloaded. Error: (string) Description of the underlying NSError. Error.AssetCannotBeVerified: The downloaded asset data cannot be verified. Error: (string) Description of the underlying NSError. Error.ConfigurationCannotBeApplied: The configuration cannot be applied to the device. Error: (string) Description of the underlying NSError. Error.ConfigurationCannotBeDeserialized: The configuration is not valid. Error: (string) Description of the underlying NSError. Error.ConfigurationFailed: An asset cannot be activated due to a configuration that failed. Identifier: (string) The Identifier of the declaration. ServerToken: (string) The ServerToken of the declaration. Error.ConfigurationIsInvalid: The configuration is not valid for applying to the device. Error: (string) Description of the underlying NSError. Error.ConfigurationNotSupported: The configuration is not supported for this platform, scope, or enrollment type. Identifier: (string) The Identifier of the configuration. ServerToken: (string) The ServerToken of the configuration. Error.InvalidPayload: A declaration is not fully loaded. Identifier: (string) The Identifier of the declaration. ServerToken: (string) The ServerToken of the declaration. Error.MissingAssets: A configuration being activated references assets that are not present. Identifier: (string) The Identifier of the configuration. ServerToken: (string) The ServerToken of the configuration. AssetIdentifiers: (array) Array of strings containing each missing asset Identifier value. Error.MissingConfigurations: An activation being activated references configurations that are not present. Identifier: (string) The Identifier of the activation. ServerToken: (string) The ServerToken of the activation. ConfigurationIdentifiers: (array) Array of strings containing each missing configuration Identifier value. Error.MissingState: A declaration is missing internal state information. Identifier: (string) The Identifier of the declaration. ServerToken: (string) The ServerToken of the declaration. Error.PredicateFailed: A predicate evaluation failed. Identifier: (string) The Identifier of the activation whose predicate failed. ServerToken: (string) The ServerToken of the activation whose predicate failed. Predicate: (string) The predicate description of the predicate that failed. Domain: (string) Underlying NSError’s domain. Code: (string) Underlying NSError’s code. Error.UnableToEvaluatePredicate: A predicate cannot be evaluated. Identifier: (string) The Identifier of the activation whose predicate failed to evaluate. ServerToken: (string) The ServerToken of the activation whose predicate failed to evaluate. Predicate: (string) The predicate description of the predicate that failed to evaluate. Error.UnableToParsePredicate: A predicate expression cannot be parsed. Identifier: (string) The Identifier of the activation whose predicate failed to parse. ServerToken: (string) The ServerToken of the activation whose predicate failed to parse. Predicate: (string) The predicate description of the predicate that failed to parse. Error.UnableToParsePredicateWithCustomOperator: A predicate expression with a custom operator cannot be parsed. Identifier: (string) The Identifier of the activation whose predicate failed to parse. ServerToken: (string) The ServerToken of the activation whose predicate failed to parse. Predicate: (string) The predicate description of the predicate that failed to parse. Error.Unknown: An unrecognized NSError was generated. Domain: (string) NSError’s domain. Code: (string) NSError’s code. Error.UnknownDeclarationType: The declaration type is not known. UnknownDeclarationType: (string) The Type of the declaration. Error.UnknownPayloadKeys: A declaration contains unknown payloads keys. UnknownPayloadKeys: (array) Array of strings containing each unknown key-path. Info.NotReferencedByActivation: A configuration is not referenced in any activation. Identifier: (string) The Identifier of the configuration. ServerToken: (string) The ServerToken of the configuration. Info.NotReferencedByConfiguration: An asset is not referenced in any configuration. Identifier: (string) The Identifier of the asset. ServerToken: (string) The ServerToken of the asset. Info.Predicate: A predicate evaluated to false. Identifier: (string) The Identifier of the activation whose predicate is false. ServerToken: (string) The ServerToken of the activation whose predicate is false. Predicate: (string) The predicate description of the predicate that is false. Info.UnsupportedSettings: Unsupported settings in a configuration. Settings: (array) Array of strings containing each unsupported setting key-path.

## Topics

### Dictionaries

- [DeclarationBase.Payload](devicemanagement/declarationbase/payload-data.dictionary.md)