How to programmatically determine whether an RSS feed is a full feed or a partial feed

Question

I would need to programmatically determine whether an RSS feed exposes the full content of its articles or just extracts of them. How would you do it?

Answer 1

Look for a link at the end that says "More", "Continued", "Full article", "..." or similar. Unless you want to follow every link on the page and look for the text from the feed plus extra perhaps.