// descriptor tag hander
myStreamHandler = new DescriptorTagHandler(myStreamHandler, myStreamHandler);
// version dependent handler
if (myUDFRevision == UDFRevision.Revision102) {
myStreamHandler = new UDF102Handler(myStreamHandler, myStreamHandler);
} else if (myUDFRevision == UDFRevision.Revision201) {
myStreamHandler = new UDF201Handler(myStreamHandler, myStreamHandler);
} else if (myUDFRevision == UDFRevision.Revision260) {
myStreamHandler = new UDF260Handler(myStreamHandler, myStreamHandler);
}