{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
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      "properties": {
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        "changed_axes": {"type": "array", "items": {"type": "string"}},
        "baseline": {"$ref": "#/$defs/provenance"},
        "candidate": {"$ref": "#/$defs/provenance"}
      }
    }
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  "$defs": {
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      "required": [
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}