title: Migration from eXist-db 1.4.x to 2.x
body: <p>We're going to migrate our application from eXist-db 1.4.1 to ~2.2 (probably RC2).
  I`m wondering if anybody already did such a migration and what impediments they met?</p>
  
  <p>I already found some documentation about this on official website and tried to Google, but didn't find much. For now I know that there were significant changes in the security model and some APIs are also changed. But still I want to know if somebody investigated further or maybe can share success story.</p>