title: How to add SQS message attributes in SNS subscription?
body: <p>The documentation for AWS SNS and SQS have sections about <em>message attributes</em>. But there is no explanation how to have SQS <em>message attributes</em> when that queue is subscribed to a SNS topic.</p>
  
  <p>Is there a way to configure AWS SNS to add particular <em>message attributes</em> to the SQS messages send via the subscription?</p>