# Data Types The Application Auto Scaling API contains several data types that various actions use. This section describes each data type in detail. **Note** The order of each element in a data type structure is not guaranteed. Applications should not assume a particular order. The following data types are supported: + [Alarm](API_Alarm.md) + [CapacityForecast](API_CapacityForecast.md) + [CustomizedMetricSpecification](API_CustomizedMetricSpecification.md) + [LoadForecast](API_LoadForecast.md) + [MetricDimension](API_MetricDimension.md) + [NotScaledReason](API_NotScaledReason.md) + [PredefinedMetricSpecification](API_PredefinedMetricSpecification.md) + [PredictiveScalingCustomizedMetricSpecification](API_PredictiveScalingCustomizedMetricSpecification.md) + [PredictiveScalingMetric](API_PredictiveScalingMetric.md) + [PredictiveScalingMetricDataQuery](API_PredictiveScalingMetricDataQuery.md) + [PredictiveScalingMetricDimension](API_PredictiveScalingMetricDimension.md) + [PredictiveScalingMetricSpecification](API_PredictiveScalingMetricSpecification.md) + [PredictiveScalingMetricStat](API_PredictiveScalingMetricStat.md) + [PredictiveScalingPolicyConfiguration](API_PredictiveScalingPolicyConfiguration.md) + [PredictiveScalingPredefinedLoadMetricSpecification](API_PredictiveScalingPredefinedLoadMetricSpecification.md) + [PredictiveScalingPredefinedMetricPairSpecification](API_PredictiveScalingPredefinedMetricPairSpecification.md) + [PredictiveScalingPredefinedScalingMetricSpecification](API_PredictiveScalingPredefinedScalingMetricSpecification.md) + [ScalableTarget](API_ScalableTarget.md) + [ScalableTargetAction](API_ScalableTargetAction.md) + [ScalingActivity](API_ScalingActivity.md) + [ScalingPolicy](API_ScalingPolicy.md) + [ScheduledAction](API_ScheduledAction.md) + [StepAdjustment](API_StepAdjustment.md) + [StepScalingPolicyConfiguration](API_StepScalingPolicyConfiguration.md) + [SuspendedState](API_SuspendedState.md) + [TargetTrackingMetric](API_TargetTrackingMetric.md) + [TargetTrackingMetricDataQuery](API_TargetTrackingMetricDataQuery.md) + [TargetTrackingMetricDimension](API_TargetTrackingMetricDimension.md) + [TargetTrackingMetricStat](API_TargetTrackingMetricStat.md) + [TargetTrackingScalingPolicyConfiguration](API_TargetTrackingScalingPolicyConfiguration.md)