| ApiBindingType | Specifies the binding type for a Custom API. |
| ApiParameterType | Specifies the data type of a Custom API request or response parameter. |
| ApiProcessingStepType | Specifies the type of processing steps allowed for a Custom API. |
| ParameterDirection | Specifies whether a Custom API parameter is an input or output parameter. |
| PluginDeployment | Specifies the deployment context in which a plugin step executes. |
| PluginImageType | Specifies the type of entity image to register with a plugin step. |
| PluginInvocationSource | Specifies the invocation source for a plugin step. |
| PluginMode | Specifies the execution mode for a plugin step. |
| PluginStage | Specifies the stage in the event pipeline when a plugin executes. |