{
  "title": "featureExpressionInfo",
  "type": "object",
  "$schema": "http://json-schema.org/draft-04/schema",
  "description": "An object that defines an expression for per-feature elevation.",
  "properties": {
    "expression": {
      "type": "string",
      "description": "An [Arcade expression](https://developers.arcgis.com/arcade/) evaluating to a number.",
      "minLength": 1
    },
    "title": {
      "type": "string",
      "description": "Title of the expression.",
      "minLength": 1
    }
  },
  "required": [
    "expression"
  ],
  "additionalProperties": false,
  "esriDocumentation": {
    "examples": [
      {
        "title": "Zero expression",
        "description": "Do not use geometry.z values",
        "code": {
          "featureExpressionInfo": {
            "expression": "0"
          }
        }
      },
      {
        "title": "Expression with field name",
        "description": "Elevation from field value without geometry.z",
        "code": {
          "featureExpressionInfo": {
            "expression": "$feature.ELEVATION_FOOT"
          }
        }
      }
    ]
  }
}