Data quality metrics extracted from 4k20.cif.gz by aB_cif2table1 from BUSTER (Global Phasing Ltd.). See also the PDBx/mmCIF dictionary.

Raw JSON data
{
  "mxlims_type": "ReflectionSet",
  "version": "0.2.2",
  "uuid": "960aab693240bf83cf7db83b3c4abbb9",
  "space_group_name": "P 31 2 1",
  "unit_cell": {
    "a": 71.630,
    "b": 71.630,
    "c": 167.791,
    "alpha": 90.0,
    "beta": 90.0,
    "gamma": 120.0
  },
  "wavelengths": [0.99990],
  "anisotropic_diffraction": false,
  "overall_refln_statistics": {
    "resolution_limits": [62.033,3.40],
    "number_observations_unique": 7344,
    "quality_factors": [
      {
        "type": "R(merge)",
        "value": 0.130
      },
      {
        "type": "I/SigI",
        "value": 13.200
      },
      {
        "type": "Completeness",
        "value": 100.000
      },
      {
        "type": "Redundancy",
        "value": 10.200
      }
    ]
  },
  "refln_shells": [
    {
      "resolution_limits": [3.580,3.400],
      "number_observations": 10939,
      "number_observations_unique": 1058,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.497
        },
        {
          "type": "I/SigI",
          "value": 1.500
        },
        {
          "type": "Completeness",
          "value": 100.000
        },
        {
          "type": "Redundancy",
          "value": 10.300
        }
      ]
    },
    {
      "resolution_limits": [3.800,3.580],
      "number_observations": 10200,
      "number_observations_unique": 979,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.337
        },
        {
          "type": "I/SigI",
          "value": 2.200
        },
        {
          "type": "Completeness",
          "value": 100.000
        },
        {
          "type": "Redundancy",
          "value": 10.400
        }
      ]
    },
    {
      "resolution_limits": [4.060,3.800],
      "number_observations": 9434,
      "number_observations_unique": 912,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.269
        },
        {
          "type": "I/SigI",
          "value": 2.700
        },
        {
          "type": "Completeness",
          "value": 100.000
        },
        {
          "type": "Redundancy",
          "value": 10.300
        }
      ]
    },
    {
      "resolution_limits": [4.390,4.060],
      "number_observations": 9114,
      "number_observations_unique": 875,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.145
        },
        {
          "type": "I/SigI",
          "value": 5.100
        },
        {
          "type": "Completeness",
          "value": 100.000
        },
        {
          "type": "Redundancy",
          "value": 10.400
        }
      ]
    },
    {
      "resolution_limits": [4.810,4.390],
      "number_observations": 8506,
      "number_observations_unique": 825,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.100
        },
        {
          "type": "I/SigI",
          "value": 7.100
        },
        {
          "type": "Completeness",
          "value": 100.000
        },
        {
          "type": "Redundancy",
          "value": 10.300
        }
      ]
    },
    {
      "resolution_limits": [5.380,4.810],
      "number_observations": 7571,
      "number_observations_unique": 736,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.100
        },
        {
          "type": "I/SigI",
          "value": 7.000
        },
        {
          "type": "Completeness",
          "value": 100.000
        },
        {
          "type": "Redundancy",
          "value": 10.300
        }
      ]
    },
    {
      "resolution_limits": [6.210,5.380],
      "number_observations": 6522,
      "number_observations_unique": 650,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.137
        },
        {
          "type": "I/SigI",
          "value": 4.800
        },
        {
          "type": "Completeness",
          "value": 100.000
        },
        {
          "type": "Redundancy",
          "value": 10.000
        }
      ]
    },
    {
      "resolution_limits": [7.600,6.210],
      "number_observations": 5705,
      "number_observations_unique": 570,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.133
        },
        {
          "type": "I/SigI",
          "value": 4.900
        },
        {
          "type": "Completeness",
          "value": 100.000
        },
        {
          "type": "Redundancy",
          "value": 10.000
        }
      ]
    },
    {
      "resolution_limits": [10.750,7.600],
      "number_observations": 4367,
      "number_observations_unique": 457,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.045
        },
        {
          "type": "I/SigI",
          "value": 13.800
        },
        {
          "type": "Completeness",
          "value": 100.000
        },
        {
          "type": "Redundancy",
          "value": 9.600
        }
      ]
    },
    {
      "resolution_limits": [58.184,10.750],
      "number_observations": 2382,
      "number_observations_unique": 282,
      "quality_factors": [
        {
          "type": "R(merge)",
          "value": 0.044
        },
        {
          "type": "I/SigI",
          "value": 13.200
        },
        {
          "type": "Completeness",
          "value": 98.900
        },
        {
          "type": "Redundancy",
          "value": 8.400
        }
      ]
    }
  ]

}
  

Table 1 generated from MXLIMS-JSON (via JavaScript):


Binned data generated from MXLIMS-JSON (via JavaScript):