Visualization Schema For Fusion Data Structures

3D scientific visualization in HPC environments is a topic that ranges from post-processing (on dedicated visualization clusters) to in-situ code instrumentation. Often, 3D visualization is based on multi-layered data access frameworks that need custom plugins to be developed for specific codes. Interfacing fusion codes in EUROfusion Code Development for Integrated Modelling is based on Consistent Physical Objects (CPOs). CPOs are standardized data structures that describe various physical aspects of fusion experiments and are designed to be suitable for use with simulation codes and experimental data. Integration with CPOs thus brings a common data model to integrated simulations that allows direct comparison with experiment, use of experimental data as an input or mixed approaches. To facilitate change and to support different programming languages, the data structure is described by a XML schema definition (XSD) from which visualization schema in XML is generated and included in datastructure description. Visualisation schema is a key for representation of data in various spaces that are linked and can be cross-CPO mapped.