This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::Bedrock::FlowAlias
<a name="aws-resource-bedrock-flowalias"></a>

Creates an alias of a flow for deployment. For more information, see [Deploy a flow in Amazon Bedrock](https://docs.aws.amazon.com/bedrock/latest/userguide/flows-deploy.html) in the Amazon Bedrock User Guide.

## Syntax
<a name="aws-resource-bedrock-flowalias-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-resource-bedrock-flowalias-syntax.json"></a>

```
{
  "Type" : "AWS::Bedrock::FlowAlias",
  "Properties" : {
      "[ConcurrencyConfiguration](#cfn-bedrock-flowalias-concurrencyconfiguration)" : FlowAliasConcurrencyConfiguration,
      "[Description](#cfn-bedrock-flowalias-description)" : String,
      "[FlowArn](#cfn-bedrock-flowalias-flowarn)" : String,
      "[Name](#cfn-bedrock-flowalias-name)" : String,
      "[RoutingConfiguration](#cfn-bedrock-flowalias-routingconfiguration)" : [ FlowAliasRoutingConfigurationListItem, ... ],
      "[Tags](#cfn-bedrock-flowalias-tags)" : {Key: Value, ...}
    }
}
```

### YAML
<a name="aws-resource-bedrock-flowalias-syntax.yaml"></a>

```
Type: AWS::Bedrock::FlowAlias
Properties:
  [ConcurrencyConfiguration](#cfn-bedrock-flowalias-concurrencyconfiguration): 
    FlowAliasConcurrencyConfiguration
  [Description](#cfn-bedrock-flowalias-description): String
  [FlowArn](#cfn-bedrock-flowalias-flowarn): String
  [Name](#cfn-bedrock-flowalias-name): String
  [RoutingConfiguration](#cfn-bedrock-flowalias-routingconfiguration): 
    - FlowAliasRoutingConfigurationListItem
  [Tags](#cfn-bedrock-flowalias-tags): 
    Key: Value
```

## Properties
<a name="aws-resource-bedrock-flowalias-properties"></a>

`ConcurrencyConfiguration`  <a name="cfn-bedrock-flowalias-concurrencyconfiguration"></a>
The configuration that specifies how nodes in the flow are executed concurrently.  
*Required*: No  
*Type*: [FlowAliasConcurrencyConfiguration](aws-properties-bedrock-flowalias-flowaliasconcurrencyconfiguration.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Description`  <a name="cfn-bedrock-flowalias-description"></a>
A description of the alias.  
*Required*: No  
*Type*: String  
*Minimum*: `1`  
*Maximum*: `200`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`FlowArn`  <a name="cfn-bedrock-flowalias-flowarn"></a>
The Amazon Resource Name (ARN) of the alias.  
*Required*: Yes  
*Type*: String  
*Pattern*: `^arn:aws(-[^:]+)?:bedrock:[a-z0-9-]{1,20}:[0-9]{12}:flow/[0-9a-zA-Z]{10}$`  
*Maximum*: `2048`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`Name`  <a name="cfn-bedrock-flowalias-name"></a>
The name of the alias.  
*Required*: Yes  
*Type*: String  
*Pattern*: `^([0-9a-zA-Z][_-]?){1,100}$`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`RoutingConfiguration`  <a name="cfn-bedrock-flowalias-routingconfiguration"></a>
A list of configurations about the versions that the alias maps to. Currently, you can only specify one.  
*Required*: Yes  
*Type*: Array of [FlowAliasRoutingConfigurationListItem](aws-properties-bedrock-flowalias-flowaliasroutingconfigurationlistitem.md)  
*Minimum*: `1`  
*Maximum*: `1`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Tags`  <a name="cfn-bedrock-flowalias-tags"></a>
Metadata that you can assign to a resource as key-value pairs. For more information, see the following resources:  
+  [Tag naming limits and requirements](https://docs.aws.amazon.com/tag-editor/latest/userguide/tagging.html#tag-conventions) 
+  [Tagging best practices](https://docs.aws.amazon.com/tag-editor/latest/userguide/tagging.html#tag-best-practices) 
*Required*: No  
*Type*: Object of String  
*Pattern*: `^[a-zA-Z0-9\s._:/=+@-]*$`  
*Minimum*: `0`  
*Maximum*: `256`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

## Return values
<a name="aws-resource-bedrock-flowalias-return-values"></a>

### Ref
<a name="aws-resource-bedrock-flowalias-return-values-ref"></a>

When you pass the logical ID of this resource to the intrinsic `Ref` function, `Ref` returns the Amazon Resource Number (ARN) of the flow and the Amazon Resource Name (ARN) of its alias, separated by a pipe (`|`).

For example, `{ "Ref": "myFlowAlias" }` could return the value `"arn:aws:bedrock:us-east-1:123456789012:flow/FLOW12345|arn:aws:bedrock:us-east-1:123456789012:flow/FLOW12345/alias/ALIAS12345"`.

For more information about using the `Ref` function, see [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html).

### Fn::GetAtt
<a name="aws-resource-bedrock-flowalias-return-values-fn--getatt"></a>

#### 
<a name="aws-resource-bedrock-flowalias-return-values-fn--getatt-fn--getatt"></a>

`Arn`  <a name="Arn-fn::getatt"></a>
The Amazon Resource Name (ARN) of the alias.

`CreatedAt`  <a name="CreatedAt-fn::getatt"></a>
The time at which the alias was created.

`FlowId`  <a name="FlowId-fn::getatt"></a>
The unique identifier of the flow.

`Id`  <a name="Id-fn::getatt"></a>
The unique identifier of the alias of the flow.

`UpdatedAt`  <a name="UpdatedAt-fn::getatt"></a>
The time at which the alias was last updated.

# AWS::Bedrock::FlowAlias FlowAliasConcurrencyConfiguration
<a name="aws-properties-bedrock-flowalias-flowaliasconcurrencyconfiguration"></a>

Determines how multiple nodes in a flow can run in parallel. Running nodes concurrently can improve your flow's performance.

## Syntax
<a name="aws-properties-bedrock-flowalias-flowaliasconcurrencyconfiguration-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-bedrock-flowalias-flowaliasconcurrencyconfiguration-syntax.json"></a>

```
{
  "[MaxConcurrency](#cfn-bedrock-flowalias-flowaliasconcurrencyconfiguration-maxconcurrency)" : Number,
  "[Type](#cfn-bedrock-flowalias-flowaliasconcurrencyconfiguration-type)" : String
}
```

### YAML
<a name="aws-properties-bedrock-flowalias-flowaliasconcurrencyconfiguration-syntax.yaml"></a>

```
  [MaxConcurrency](#cfn-bedrock-flowalias-flowaliasconcurrencyconfiguration-maxconcurrency): Number
  [Type](#cfn-bedrock-flowalias-flowaliasconcurrencyconfiguration-type): String
```

## Properties
<a name="aws-properties-bedrock-flowalias-flowaliasconcurrencyconfiguration-properties"></a>

`MaxConcurrency`  <a name="cfn-bedrock-flowalias-flowaliasconcurrencyconfiguration-maxconcurrency"></a>
The maximum number of nodes that can be executed concurrently in the flow.  
*Required*: No  
*Type*: Number  
*Minimum*: `1`  
*Maximum*: `100`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Type`  <a name="cfn-bedrock-flowalias-flowaliasconcurrencyconfiguration-type"></a>
The type of concurrency to use for parallel node execution. Specify one of the following options:  
+ `Automatic` - Amazon Bedrock determines which nodes can be executed in parallel based on the flow definition and its dependencies.
+ `Manual` - You specify which nodes can be executed in parallel.
*Required*: Yes  
*Type*: String  
*Allowed values*: `Automatic | Manual`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

# AWS::Bedrock::FlowAlias FlowAliasRoutingConfigurationListItem
<a name="aws-properties-bedrock-flowalias-flowaliasroutingconfigurationlistitem"></a>

Contains information about a version that the alias maps to.

## Syntax
<a name="aws-properties-bedrock-flowalias-flowaliasroutingconfigurationlistitem-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-bedrock-flowalias-flowaliasroutingconfigurationlistitem-syntax.json"></a>

```
{
  "[FlowVersion](#cfn-bedrock-flowalias-flowaliasroutingconfigurationlistitem-flowversion)" : String
}
```

### YAML
<a name="aws-properties-bedrock-flowalias-flowaliasroutingconfigurationlistitem-syntax.yaml"></a>

```
  [FlowVersion](#cfn-bedrock-flowalias-flowaliasroutingconfigurationlistitem-flowversion): String
```

## Properties
<a name="aws-properties-bedrock-flowalias-flowaliasroutingconfigurationlistitem-properties"></a>

`FlowVersion`  <a name="cfn-bedrock-flowalias-flowaliasroutingconfigurationlistitem-flowversion"></a>
The version that the alias maps to.  
*Required*: No  
*Type*: String  
*Pattern*: `^(DRAFT|[0-9]{0,4}[1-9][0-9]{0,4})$`  
*Minimum*: `1`  
*Maximum*: `5`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)