Look at a) the comments in xml_woarchive regarding derivation. b) portabla_binary_archive demo in the librar c) discussion of this topic in the current documentation Robert Ramey Robert Bielik wrote:

When loading an object via serialization I need to be able to load the object in different modes (which has nothing to do with its data). I tried making an ext_xml_wiarchive (inheriting xml_wiarchive) that adds a function to retrieve the mode, but the serialization template functions do not seem to be able to access that function.

I know I'm missing something here... :(

/R