virtual int plaintext(odocstringstream &, OutputParams const &,
size_t max_length = INT_MAX) const = 0;
/// docbook output
- virtual int docbook(odocstream & os, OutputParams const &) const;
+ virtual void docbook(XMLStream &, OutputParams const &) const;
/// XHTML output
/// the inset is expected to write XHTML to the XMLStream
/// \return any "deferred" material that should be written outside the