Some "fruit preserves" also use vinegars and other acids. Which leads to the Venn diagrams of the definitions of pickles, chutneys, and preserves (fruit) all have a massive overlap and ketchup is right there in the middle as pickled tomatoes, tomato chutney, or tomato preserve depending on how much you want to classify it is a fruit, vegetable, or "it doesn't matter". (I would at least argue that "preserve" is the more accurate fruit term over jam or jelly.)