Description edit
This is a navigation experimental template, specific for Horses and roads (hence the acronym HAR). It's mainly built to link analytical index of the book to anchors into the text; such links must run both into nsPage and ns0.
Optionally it will give back some metadata of the book.
It uses {{Page only}} and the generated links point to {{Anchor2}} anchors. It uses too its subpage Data as a named array space.