I'm not sure if all the information I list is possible to retrieve.  And secondly, for CSV, I don't list any of the comments associated with a review because it seems against the natural CSV structure/hierarhy. Unless it is okay, for example, to input the data like:

"[Review] this is a review.", "[comment] this is a comment on the review.", "[comment] this is the second comment on the reivew".

NEW ROW: "[Review] this is another review.", "[comment] etc.."

Y'know, thinking about it right now, I don't think this is CSV... like, a CSV file is something that could / should map properly to a spreadsheet...
You mention this in your notes, but the many-comments (or bugs, or attachment links) is kind of opposing the way CSV generally works.
I think a better way of doing this might be to visualize it as being inserted in an Excel spreadsheet, and extrapolating the CSV format from that.
Can you create a spreadsheet, and toss this review request data into it and see how it looks? I imagine that's what folks are using these CSV files for anyways - for putting into spreadsheets. We might as well try to find a way of formatting it to look good.

The filenames and the URLs to the files might be.

Sorry it's taken me so long to get back to you on this, Mark. I think your second mockument (heh) looks like a great place to start. Let's roll with that.