# type ChangeHistoryValue (v202505)

**Service** **PublisherQueryLanguageService** **Inheritance** [Value](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.Value) ▼ [ObjectValue](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ObjectValue) ▼ **ChangeHistoryValue** [TargetingValue](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.TargetingValue)

This class is unused. It exists only to provide reference documentation of the possible values
for [type](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ChangeHistoryEntityType) and [ChangeHistoryOperation](https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ChangeHistoryOperation).

*** ** * ** ***

Namespace
:
    `https://www.google.com/apis/ads/publisher/v202505`

| ## Field ||
|---|---|
| **`Value` (inherited)** ||
| **`ObjectValue` (inherited)** ||
| **`ChangeHistoryValue`** ||
| ### `entityType` | ` https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ChangeHistoryEntityType ` *** ** * ** *** **Enumerations** `UNKNOWN` :   The value returned if the actual value is not exposed by the requested API version. `BASE_RATE` : `COMPANY` : `CONTACT` : `CREATIVE` : `CREATIVE_SET` : `CUSTOM_FIELD` : `CUSTOM_KEY` : `CUSTOM_VALUE` : `PLACEMENT` : `AD_UNIT` : `LABEL` : `LINE_ITEM` : `NETWORK` : `ORDER` : `PREMIUM_RATE` : `PRODUCT` : `PRODUCT_PACKAGE` : `PRODUCT_PACKAGE_ITEM` : `PRODUCT_TEMPLATE` : `PROPOSAL` : `PROPOSAL_LINK` : `PROPOSAL_LINE_ITEM` : `PACKAGE` : `RATE_CARD` : `ROLE` : `TEAM` : `USER` : `WORKFLOW` : <br /> |
| ### `operation` | ` https://developers.google.com/ad-manager/api/reference/v202505/PublisherQueryLanguageService.ChangeHistoryOperation ` *** ** * ** *** **Enumerations** `CREATE` : `UPDATE` : `DELETE` : `UNKNOWN` :   The value returned if the actual value is not exposed by the requested API version. <br /> |