Major The aim is to declare a zone as inherited from another zone, so when the current zone is empty it will inherit the content of the named zone in the parent page.
e.g. A skin with a single template with a zone 'default' and a zone 'right'. By declaring the 'right' zone as inheriting the 'right' zone, the following behavior will apply : when the right zone is empty, it is filled with the content of the right zone in the parent page (or the parent-parent page...).
Almost done. (todo documentation)
inherit="" to inherit a same named zone
inherit="foo" to inherit a zone named "foo"
inherit="t1->foo,*
>other,t2>" to inherit "foo" on the template t1, to inherit "other" on all templates, but to do not inherit from template t2