We need some classes, that are able to read, write and validate (!)
XML-Files. There are several XML-Libraries out there. One is from the
GNOME-Project (called libxml), but this one is in C only.
think, it is preferable to have a base class that is able to cope with
XML and all other parts of TXC that need to cope with XML as well, will
be derived from this class.
Note, that it is important, that the
XML-lib does validating a XML-file by using a data type description