Two different ways to convert an XML document to JSON

petstore.xml

<petStore>
  <pets>
    <dog>
      <id>515</id>
      <name>Rusty</name>
      <breed>ChocolateLabrador</breed>
    </dog>
    <dog>
      <id>516</id>
      <name>Lulu</name>
      <breed>Chihuahua</breed>
    </dog>
    <cat>
      <id>572</id>
      <name>Peanut</name>
      <breed>Birman</breed>
    </cat>
  </pets>
</petStore>

petstore_1.json

{
  "petStore": {
    "pets": {
      "dogs": [{
        "id": 515,
        "name": "Rusty",
        "breed": "ChocolateLabrador"
      }, {
        "id": 515,
        "name": "Lulu",
        "breed": "Chihuahua"
      }],
      "cats": [{
        "id": 572,
        "name": "Peanut",
        "breed": "Birman"
      }]
    }
  }
}

petstore_2.json

{
  "petStore": {
    "pets": [{
      "type": "dog",
      "id": 515,
      "name": "Rusty",
      "breed": "ChocolateLabrador"
    }, {
      "type": "dog",
      "id": 516,
      "name": "Lulu",
      "breed": "Chihuahua"
    }, {
      "type": "cat",
      "id": 572,
      "name": "Peanut",
      "breed": "Birman"
    }]
  }
}