title: How is the Data Mapper pattern different from the Repository Pattern?
body: <p>I found two patterns which appear to have the same goal - what is the difference?</p>
  
  <p><a href="http://martinfowler.com/eaaCatalog/dataMapper.html">http://martinfowler.com/eaaCatalog/dataMapper.html</a></p>
  
  <p><a href="http://martinfowler.com/eaaCatalog/repository.html">http://martinfowler.com/eaaCatalog/repository.html</a></p>