{
  "fields": [
    {
      "field": "MRG.1",
      "minOccurs": "1",
      "maxOccurs": "unbounded"
    },
    {
      "field": "MRG.2",
      "minOccurs": "0",
      "maxOccurs": "unbounded"
    },
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      "minOccurs": "0",
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    },
    {
      "field": "MRG.4",
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      "maxOccurs": "1"
    },
    {
      "field": "MRG.5",
      "minOccurs": "0",
      "maxOccurs": "1"
    },
    {
      "field": "MRG.6",
      "minOccurs": "0",
      "maxOccurs": "1"
    },
    {
      "field": "MRG.7",
      "minOccurs": "0",
      "maxOccurs": "unbounded"
    }
  ]
}