// http://en.tldp.org/LDP/LDP-Author-Guide/inserting-pictures.html
// See also the docbook guide at http://www.docbook.org/
int InsetGraphics::docbook(Buffer const &, ostream & os,
// http://en.tldp.org/LDP/LDP-Author-Guide/inserting-pictures.html
// See also the docbook guide at http://www.docbook.org/
int InsetGraphics::docbook(Buffer const &, ostream & os,