<!-- bryant-content-generator:start --> # The structure is nevertheless not a tree, and this... > The structure is nevertheless not a tree, and this is the correction the deployed artifact forces on any tidy account of it. Every quote page and passage page carries an explicit **return edge** — a stated source linking back to the document it came from, rendered simultaneously as a hyperlink and as a live node-and-edge in the interactive graph beside the text. Composition runs downward from book to passage to sentence; navigation runs in **both directions**, and the return edge is what converts a pile of extracted fragments into something a reader can traverse. {{Extraction without a path home is fragmentation; extraction with a path home is a lattice.}} The consequence compounds when a sentence recurs, because a quotation that appears in more than one work fans back to all of them, and the node stops being a leaf and becomes a junction. {{A sentence that appears in two books makes those two books neighbours, and the reader who arrived at the sentence can now walk to either one.}} **Source:** [[projects/Dual-Render Authorship and the Atomic Markdown Double-Brace Grammar|Dual-Render Authorship: The Atomic Markdown Double-Brace Grammar]], [[working/control/pre-dual-render-integration-2026-08-31/projects/Dual-Render Authorship and the Atomic Markdown Double-Brace Grammar|Dual-Render Authorship: The Atomic Markdown Double-Brace Grammar]] <!-- bryant-content-generator:end -->