The exact mapping rules: every attribute becomes a @name key (category="fiction" → "@category": "fiction"). If an element has both child elements and its own text, that text is captured as #text — but if the element has only text and no attributes, it collapses to a plain string with no wrapper object at all. Repeated sibling elements with the same tag name (two <book> elements) don't overwrite each other — the second occurrence turns the value into an array automatically.