Preface.- Foreword.- U. Langer, A. Mantzaflaris, S.E. Moore, I. Toulopoulos: Multipatch Discontinuous Galerkin Isogeometric Analysis.- E. Brivadis, A. Buffa, B. Wohlmuth, L. Wunderlich: The Influence of Quadrature Errors on Isogeometric Mortar Methods.- M. Pauley, D.-M. Nguyen, D. Mayer, J. Speh, O. Weeger, B. J