modify documents

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김경종
2026-06-08 15:45:12 +09:00
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**Reason**: Shell results contain structured mesh, step/frame, nodal, element, Gauss point, resultant, stress, metadata, and tolerance data. HDF5 is better suited than flat CSV for this result hierarchy.
**Tradeoff**: HDF5 becomes a required dependency. FESA will provide an internal RAII wrapper over the HDF5 C API, but the actual HDF5 C library must be supplied by `HDF5_ROOT` or `HDF5_DIR`.
**Tradeoff**: HDF5 becomes a required dependency. FESA will provide an internal RAII wrapper over the HDF5 C API, but the actual HDF5 C library must be supplied by `HDF5_ROOT` or `HDF5_DIR`. The current local Windows install is `C:\Program Files\HDF_Group\HDF5\2.1.1`; use `HDF5_ROOT` for that root or `HDF5_DIR` for `C:\Program Files\HDF_Group\HDF5\2.1.1\cmake`.
## ADR-008: Single Tolerance Policy
**Decision**: Reference comparison uses a single tolerance value `1e-5`. A compared scalar passes when absolute error or relative error is within `1e-5`.