JDBC: What is 'String type' in Serialize()-constructor?

Hi, 

the subject says it all. 
I could not find a documentation for the parameters of the constructor
of the class postgres.util.Serialize(Connection c, String type).
Connection c is clear to me but what is 'String type' about?
I looked at Peter T. Mounts documentation which documents every method
in that class with parameter description, except the constructor :-)

Any help appreciated.

Cheers, 

Christoph

--
Dr. Christoph Steinbeck (http://www.ice.mpg.de/~stein)
MPI of Chemical Ecology, Tatzendpromenade 1a, 07745 Jena, Germany
Tel: +49(0)3641 643644 - Mobile: +49(0)177 8236510 - Fax: +49(0)3641
643665

What is man but that lofty spirit - that sense of enterprise. 
... Kirk, "I, Mudd," stardate 4513.3..