string return result conventions

["Luke Kenneth Casson Leighton" <lkcl lkcl net>]

folks, hi,
i'm looking for advice on memory return result conventions - who is
responsible for maintaining andd/or freeing memory, in particular
strings, as return results from pproperrty getting for example.  the
webkit-glib bindings are going extremely well, pywebkitgtk has them in
use, however, the conventions for webkit are that the library
maintains responsibility for any string management, such that users of
the library do not have to worry about malloc or free.
therefore it's important for me to find out what glib / gobject memory
conventions are, for strings.
much appreciated your advice.
l.