### 29.1 Understanding how navigation links work

DITA2Go navigation features are designed to work in cases where parallel or subordinate headings are in split files of their own, not in the same file as the headings to which they will be linked. This is not a minor point; in fact, the code for local TOCs, trails, and browse sequences depends heavily on the code for file splitting. That is where DITA2Go gets the titles and links to use. If you do not split DITA files into topics, those lists of titles and links have no content. For example, a trail link would show only the last Heading1 in the file, a local TOC would be completely empty, and browse links would go nowhere.

See §27.3 Splitting files.

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29.2 Generating trails of links

29.3 Creating a browse sequence

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