title: Front end for backend DDD
body: <p>We have a application landscape with many micro services and use a backend for front-end for the UI to aggregate data.</p>
  <p>Would you put the aggregation logic (combine data from multiple micro services) in the domain or application layer of the Front End For Backend Application?</p>
  <p>It feels like business logic, however, there is no persistance only data retrieval, so I am in doubt where to put it?</p>