impl dtd models cmany cmnode ftype furi cmany type uri position type ftype type furi uri position gettype ftype geturi furi isnullable stringbuffer strret stringbuffer strret.append strret.append strret.append furi strret.append strret.append append append strret.tostring calcfirstpos cmstateset toset.zerobits toset.setbit calclastpos cmstateset toset.zerobits toset.setbit