Has anyone here had experience of building software that can use both Perl and Java objects to pull information from an XML data structure. And with these objects generate XML objects for further evaluation. My understanding of applied informatics tells me it is a good idea but I am happy to hear suggestions from computer scientists that can explain to me why it might be a bad idea. I want to generate a programming framework that will allow individuals to add their own bits and bobs in the language of their choice. It will enable them to use either BioPerl or BioJava. Also. Can Perl and Java objects be easily held in and pulled from the same database? If so, how?