{
    "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"
                    }
                }
            }
        ]
    }
}