Where's the support for Unimarc?

Hello everybody,
I'm about to use MARC::Record for the first time, and I've found nothing 
on CPAN about Unimarc. Did I do a wrong search? I happened to read about 
something some times ago, but I don't remember where.
I've tried to use it step by step by simply creating an empty record and 
filling it field by field while reading a file (line by line). It almost 
worked, but it seems USMARC has some functions that could ease my work 
if they existed for Unimarc.

Can someone address me please?

Another question: is there a way to import from an Aleph sequential file?

Thanks in advance,
Emanuele