example

{
      "elements": [
        {
          "type": "element",
          "name": "PMML",
          "attributes": {
            "xmlns": "http://www.dmg.org/PMML-4_4",
            "xmlns:cheese": "http://cheese.org",
            "version": "4.4"
          },
          "elements": [
            {
              "type": "element",
              "name": "Header",
              "attributes": {
                "copyright": "DMG.org"
              }
            },
            {
              "type": "element",
              "name": "DataDictionary",
              "attributes": {
                "numberOfFields": "2"
              },
              "elements": [
                {
                  "type": "element",
                  "name": "DataField",
                  "attributes": {
                    "name": "age",
                    "optype": "continuous",
                    "dataType": "double"
                  },
                  "elements": [
                    {
                      "type": "element",
                      "name": "Interval",
                      "attributes": {
                        "closure": "closedClosed",
                        "leftMargin": "0",
                        "rightMargin": "100"
                      }
                    }
                  ]
                },
                {
                  "type": "element",
                  "name": "DataField",
                  "attributes": {
                    "name": "weight",
                    "optype": "continuous",
                    "dataType": "double"
                  },
                  "elements": [
                    {
                      "type": "element",
                      "name": "Interval",
                      "attributes": {
                        "closure": "closedClosed",
                        "leftMargin": "0",
                        "rightMargin": "200"
                      }
                    }
                  ]
                }
              ]
            },
            {
              "type": "element",
              "name": "RegressionModel",
              "attributes": {
                "modelName": "You get fatter as you get older",
                "functionName": "regression",
                "algorithmName": "linearRegression",
                "targetFieldName": "height_of_tide"
              },
              "elements": [
                {
                  "type": "element",
                  "name": "MiningSchema",
                  "attributes": {
                    "cheese:withExtraFlavour": "edam"
                  },
                  "elements": [
                    {
                      "type": "element",
                      "name": "MiningField",
                      "attributes": {
                        "name": "age"
                      }
                    },
                    {
                      "type": "element",
                      "name": "MiningField",
                      "attributes": {
                        "name": "weight",
                        "usageType": "target"
                      }
                    }
                  ]
                },
                {
                  "type": "element",
                  "name": "RegressionTable",
                  "attributes": {
                    "intercept": "2"
                  },
                  "elements": [
                    {
                      "type": "element",
                      "name": "NumericPredictor",
                      "attributes": {
                        "name": "age",
                        "exponent": "1",
                        "coefficient": "1.6"
                      }
                    }
                  ]
                }
              ]
            }
          ]
        }
      ]
    }