This volume includes revised final versions of the best papers presented at the fourth European Workshop on Natural Language Generation, EWNLG '93, held in Pisa, Italy in April 1993. Out of the 35 papers accepted for presentation at the workshop, 19 were selected for publication in this book.The papers deal with NLG from different perspectives: linguistics, artificial intelligence, psychology, and engineering. The broad spectrum covered and the outstanding quality of the papers presented are evidence of the remarkable dynamism of the field.