title: In a Java project which file format to be used for Data Dictionary will give best performance?
body: <p>Using which type comes as Best practice .</p>
  
  <p>For eg. XML , CSV , YML .</p>
  
  <p>Edit : 
  This is a UI Automation Java Project employing webdriver. By Data Dictionary I mean the repo of data to be used in Tests.</p>