The Independent fields in every export
The article record covers canonical URL, headline, standfirst, section and subsection, byline, publication timestamp, last updated timestamp, item type and the article identifier.
The access flag records whether the article was Premium at collection time and how much text rendered publicly. Most output is free, which makes the flagged minority easy to handle and easy to forget - so it is a field rather than an assumption.
Live pages are collected as a parent record with their stream of timestamped entries: entry text, time, author where credited, and any embedded quote or link. The parent carries an entry count and the time of the latest entry, so a page that has gone quiet is distinguishable from one still running.
Both timestamps are kept separately, which matters here because headlines on fast moving stories are rewritten in place through the day.
Front observations record which items sat on a front, in what order and when. On a high volume title, promotion is a far better proxy for editorial weight than a count of items.