d4p.max.nav.depth Ant parameter
Specifies the maximum depth of the navigation table of contents.
This property controls the depth of navigation tables of contents, such as left-nav trees for HTML5 output and the EPUB navigation toc. This is distinct from any HTML table of contents that might get generated. For example, Apple uses the practice of a single-level navigation ToC in EPUBs.
The default is the value of the d4p.max.toc.depth parameter, which itself defaults to "5".