[Biopython] User-defined SeqRecord annotations are trashed in INSDC formats?

[Uri Laserson]

>
> You could stuff record level information into a source feature's
> qualifier dictionary.


What are the allowed types for the values of the qualifiers dictionary (that
will be output correctly in INSDC)?  Is it possible to have lists of
strings?

What is the standard practice: a feature of type "source" that runs the
entire length of the sequence?  Or is it possible to have a SeqFeature with
no position annotation?  Ideally, if I slice the SeqFeature, I would like
these annotations to stay with the slice no matter what.

Uri