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This paper presents the approach, the status and the future of two companion open standards for electronic exchange and archival of space engineering data: 1) STEP-NRF - Network-model Results Format - a discipline-independent protocol for the definitions of analysis, test or operation cases/models and the bulk results produced by running such cases/models. A generic network-model formulation is used to represent the different elements of an analysis model, a test article or an operational product and where applicable their environment. The results are stored as valued properties for particular network-model components for a particular state during a run. Properties can be of scalar, vector or tensor type. Special care is taken to ensure efficient storage of sparse data structures. 2) STEP-TAS - Thermal Analysis for Space - a protocol for the definitions of space missions and models used in thermal analysis.