  Another figure so influenced was Martin Heidegger, whose Habilitationsschrift was published in 1916 under the title, Die Kategorien- und Bedeutungslehre des Duns Scotus. This book has not been much studied by Heidegger scholars, which is a pity because it is really about Heidegger's own project of advancing the Husserlian notion of a priori grammar.  A work of historical scholarship it is not. In what now seems a classic understatement, the historian of medieval philosophy Martin Grabmann wrote of this book in 1926, “Martin Heidegger has demonstrated the continuity of the Grammatica speculativa hitherto attributed to Duns Scotus with the terminology and overall intellectual outlook of Husserl, so that the structure and distinctiveness of the medieval original is somewhat  obscured”.[24]  In his defense, Heidegger never pretends to be doing history of philosophy in Die Kategorien- und Bedeutungslehre des Duns Scotus. On the contrary, he states at the beginning of Part II that he is mostly interested in exploring the implications of De modis significandi for the broader theory of meaning, and that he is following scholarly consensus in attributing it to Duns  Scotus.[25]