can we specify more than one value for the discriminator field for a subclass
if so how could it be

thanks in advance
zeeta

AFAIK this is planed (done?) for hibernate 3.

If you have a DB which supports triggers on views (e.g. Oracle) you could do it like that:
Create a view which composes the values into one column. Then create an instead of trigger for insert/delete/update where you decompose the values in order to access the apropriate columns.

HTH
Ernst

It is done in HB3