
The 'docbook' webbox is used just to display the cache (HTML) files
of a DocBookWiki application. It is useful for including a docbook
document in an application.

It can be included like this:
<include src="{{DOCBOOK_PATH}}docbook.html" />
where DOCBOOK_PATH is defined by the framework itself.
If you make a local copy of the webbox, then you have 
to use the right path. 

It has these state variables which can be initialized or changed
by the application that includes it:

docbook->cache_path  -- the path of the HTML files (usually the
                        directory 'contents/books/cache/' of the DocBookWiki
docbook->book_id     -- the id of the book
docbook->node_path   -- the path of the node to be displayed (default './')
docbook->lng         -- the language of the book (default 'en')
docbook->webnotes    -- show webnotes if it is 'true' (default 'false')

The JS function set_node(node_path) can be used by the application
to change the node that is currently displayed.

If the state var 'docbook->webnotes' is 'true', then webnotes
will be appended at the end of each section, but first the database
of the webnotes must be installed.