Model options available for classification requests.
| JSON representation | 
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{ // Union field  | 
            
| Fields | |
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Union field model_type. If this field is not set, then the v1_model will be used by default. model_type can be only one of the following: | 
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v1 | 
              
                 
 Setting this field will use the V1 model and V1 content categories version. The V1 model is a legacy model; support for this will be discontinued in the future.  | 
            
v2 | 
              
                 
 Setting this field will use the V2 model with the appropriate content categories version. The V2 model is a better performing model.  | 
            
V1Model
This type has no fields.
Options for the V1 model.
V2Model
Options for the V2 model.
| JSON representation | 
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{
  "contentCategoriesVersion": enum ( | 
              
| Fields | |
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content | 
                
                   
 The content categories used for classification.  | 
              
ContentCategoriesVersion
The content categories used for classification.
| Enums | |
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CONTENT_CATEGORIES_VERSION_UNSPECIFIED | 
                If ContentCategoriesVersion is not specified, this option will default to V1. | 
              
V1 | 
                Legacy content categories of our initial launch in 2017. | 
V2 | 
                Updated content categories in 2022. |