Stakes and challenges
CSV is one of the most (if not THE most) widely spread metadata listing formats. Whether metadata are your only interest or content is (or both), you’ll be safe to head that direction, moreover because Fast2 will get you covered.
On the techier side...
Fast2 integrates a highly customizable CSV module taking as input CSV file(s) built up at your will. If the complexity of your documents requires cross-referencing among different files, be sure Fast2 will be a great support in achieving the processing of the documents you were initially exepecting.