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# AWS::KinesisAnalyticsV2::ApplicationReferenceDataSource ReferenceSchema
<a name="aws-properties-kinesisanalyticsv2-applicationreferencedatasource-referenceschema"></a>

For a SQL-based Kinesis Data Analytics application, describes the format of the data in the streaming source, and how each data element maps to corresponding columns created in the in-application stream. 

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

### JSON
<a name="aws-properties-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-syntax.json"></a>

```
{
  "[RecordColumns](#cfn-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-recordcolumns)" : {{[ RecordColumn, ... ]}},
  "[RecordEncoding](#cfn-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-recordencoding)" : {{String}},
  "[RecordFormat](#cfn-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-recordformat)" : {{RecordFormat}}
}
```

### YAML
<a name="aws-properties-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-syntax.yaml"></a>

```
  [RecordColumns](#cfn-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-recordcolumns): {{
    - RecordColumn}}
  [RecordEncoding](#cfn-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-recordencoding): {{String}}
  [RecordFormat](#cfn-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-recordformat): {{
    RecordFormat}}
```

## Properties
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`RecordColumns`  <a name="cfn-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-recordcolumns"></a>
A list of `RecordColumn` objects.   
*Required*: Yes  
*Type*: Array of [RecordColumn](aws-properties-kinesisanalyticsv2-applicationreferencedatasource-recordcolumn.md)  
*Minimum*: `1`  
*Maximum*: `1000`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`RecordEncoding`  <a name="cfn-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-recordencoding"></a>
Specifies the encoding of the records in the streaming source. For example, UTF-8.  
*Required*: No  
*Type*: String  
*Pattern*: `UTF-8`  
*Minimum*: `5`  
*Maximum*: `5`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`RecordFormat`  <a name="cfn-kinesisanalyticsv2-applicationreferencedatasource-referenceschema-recordformat"></a>
Specifies the format of the records on the streaming source.  
*Required*: Yes  
*Type*: [RecordFormat](aws-properties-kinesisanalyticsv2-applicationreferencedatasource-recordformat.md)  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

## See also
<a name="aws-properties-kinesisanalyticsv2-applicationreferencedatasource-referenceschema--seealso"></a>
+ [SourceSchema](https://docs.amazonaws.cn/managed-flink/latest/apiv2/API_SourceSchema.html) in the *Amazon Kinesis Data Analytics API Reference*