json-schema.txt

{
    "productId": 1,
    "productName": "some name",
    "price": 12.50
}

const schema = {
    type: "object",
    required: ["productId"]
    properties: {
        "productId": {
            description: "Unique id for a product",
            type: "integer"
        },
        "productName": {
            description: "product name ",
            type: "string",
            minLength: 10
        }
    }
}

[
  {
    "productId": 1,
    "productName": "some name",
    "price": 12.50
  }  
]

const schemaArray = {
    type: 'array',
    items: {
        type: 'object',
        required: ["productId"]
        properties: {
        "productId": {
            description: "Unique id for a product",
            type: "integer"
        },
        "productName": {
            description: "product name ",
            type: "string",
            minLength: 10
        }
     }
    }
}