DAQV: Distributed Array Query and Visualization Framework. This paper describes the design and implementation of the distributed array query and visualization (DAQV) framework, a project sponsored by the parallel tools consortium. DAQV’s reference implementation targets High Performance Fortran (HPF) and leverages the HPF language, compiler, and runtime system to address the general problem of providing high-level access to distributed data structures. DAQV supports a framework in which visualization and analysis clients connect to a distributed array server (i.e., the HPF application with DAQV control) for program-level access to array values. Implementing key components of DAQV in the parallel language (e.g., HPF) itself has led to a robust solution in which clients do not need to know how data is distributed. The framework is highly portable to different computing environments as well as other languages where distributed data is involved.