/// write ASCII output to the ostream
virtual int ascii(Buffer const *, std::ostream &, int linelen) const;
/// write LinuxDoc output to the ostream
virtual int linuxdoc(Buffer const *, std::ostream &) const;
/// write DocBook output to the ostream
/// write ASCII output to the ostream
virtual int ascii(Buffer const *, std::ostream &, int linelen) const;
/// write LinuxDoc output to the ostream
virtual int linuxdoc(Buffer const *, std::ostream &) const;
/// write DocBook output to the ostream