Alternative forms of metadata

[Gustavo Niemeyer]

Hey Anders,

> But this would create a dependency of Smart on YUM / ZYpp, and
> is probably best avoided. The current XML parser, however, only
> requires the XML module (= ElementTree) maybe implicitly expat.

Another option is to create an additional channel format which
uses YUM/Zypp, but only when the channel format is used as well.
So Smart doesn't depend on them, but they can optionally be used
to support these formats, if wanted.

-- 
Gustavo Niemeyer
http://niemeyer.net