contentBasedDeduplication

Enables content-based deduplication for FIFO topics.

• By default, `ContentBasedDeduplication` is set to `false`. If you create a FIFO topic and this attribute is `false`, you must specify a value for the `MessageDeduplicationId` parameter for the Publish action.

• When you set `ContentBasedDeduplication` to `true`, SNS uses a SHA-256 hash to generate the `MessageDeduplicationId` using the body of the message (but not the attributes of the message). (Optional) To override the generated value, you can specify a value for the the `MessageDeduplicationId` parameter for the `Publish` action.