What is in a DTA file?

Wow.  This one is even simpler than the MGF file:

You get the monoisotopic mass (A1), the charge state (B1) and you get the fragment masses and areas.  Each individual DTA file is given its own number, but I am unclear as to whether you can use that ID to reference back to your original scan event (actually, I doubt it).  You could always do it manually.

Again, no charge state assignment.