WAPP	ADP
wapp-page-XXXXX	pages/appn/XXXXX.adp
wapp-subst string	ns_adp_puts string
wapp-param NAME ?DEFAULT?	ns_set get $::page::form name ?default?
No templates.	Move HTML generation out to tpl/appn/*.adp.
Everything is global.	Rewrite wapp-page-* proc to receive parameters.
Needs startup code.	Introduce strategy for persistency: cookies, nsv