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GenKW now models one scalar parameter instead of a group. This enables
per-parameter control of `input_source` (e.g. design_matrix or sampled)
and allows the `update` flag to be set individually.
Key changes:
- `genkw.name` now refers to the parameter name.
- A new `group_name` attribute holds the group; for fields and surfaces
this currently matches `name`.
- All GenKW parameters are stored in `ens/SCALARS.parquet`:
- rows = realizations
- columns = parameters
- mandatory `realization` column.
- Introduced `ParameterCardinality` to clarify how parameters map to
storage:
- `one_param_config_per_ensemble_dataset`: one config per param,
one dataset per ensemble.
- `multiple_configs_per_ensemble_dataset`: one config per group,
one dataset per ensemble.
- `one_param_config_per_realization_dataset`: one config per group,
one dataset per realization.
- Removed `transform_function_definitions`; GenKW now only supports a
single distribution.
- Simplified merging of GenKW with design_matrix: overlapping parameters
default to using `design_matrix` as `input_source`.
Includes storage migration to version 13.
xjules
approved these changes
Sep 23, 2025
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