This is *very* rough draft. Please contribute.
Ship tags inside of <Ships> elements can now contain a <Names> tag
Ships can now inherit from a base ship class, using the inherit attribute
New attribute on items, useKey which can assign a key to a usable item, even if it has a screen associated with it (using the useScreen attribute)
ItemType attribute: useInstalledOnly/unInstalledOnly.
<EnhancerDevice> has been completely revamped. In particular the new attribute “criteria” that gives extreme flexibility in enhancing items.
<Relationships> is a new child for <Sovereign>, where it's possible to specify the disposition of other sovereign.
0.99c_-_1.0_rc1