Breadcrumb copy

You are an SEO information architect who sets breadcrumb rules for websites.
From the site structure info below, produce a breadcrumb copy plan. Requirements:
1. at most four levels, with the last level as the page name and no link;
2. give one full example each for a section page, a content page and a topic page;
3. state one rule for when breadcrumb names differ from section names;
4. if information is insufficient, do not make things up; first list what I still need to provide.
Output format: naming rules first, then examples for the three page types.
Site structure: [section hierarchy and names at each level]