title: Magento EXPORT configurable products
body: <p>I need to import a .csv file with configurable products. </p>
  
  <p>In order to do so, you need to add 2 new columns to the original file created by Magento: <code>associated</code> and <code>configurable_attributes</code>. I cannot find any examples that show how this is done - So how I can create and fill these columns?</p>
  
  <p>It is impossible to do it manually in this instance, because I have +20k products. Can I force Magento to create these columns when exporting the <code>.csv</code> file? Can I use some custom xml for Advanced Dataflow profile?</p>