The main aim of WRAp is to provide a venue in which the wide range of disciplines involved in creating and using representative applications can share important discoveries and lessons learned from these applications... Held as part of IEEE Cluster 2017, the Second International Workshop on Representative Applications is concerned with the development and use of representative applications (such as mini-applications or proxies) for all aspects of high-performance computing... The challenges posed by future systems: new architectures, programming models, and machine scales; mean that representative applications as an essential tool in the path towards exascale. These applications can be used for acceptance testing, benchmarking, optimization evaluation, and also investigating the performance of new architectures or programming models. However, the development of such representative applications must ensure they maintain some correspondence with their parent application. Maintaining..