using System;

using Newtonsoft.Json.Schema;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        var schema = JsonSchema.Parse(@"

        {

            ""$schema"": ""http://json-schema.org/draft-03/schema#"",

            ""properties"": {

                ""recipients"": {

                    ""type"": ""array"",

                    ""minItems"" : 1,

                    ""required"":true,

                    ""items"": {

                        ""type"": [

                            {

                                ""properties"": {

                                    ""type"": {""enum"": [""provider""]},

                                    ""identifier"": {""required"": true},

                                    ""id_type"": {""required"": true}

                                }

                            },

                            {

                                ""properties"": {

                                    ""type"": {""enum"": [""organization""]}

                                }

                            }

                        ],

                        ""properties"": {

                            ""type"": {

                                ""type"": ""string"",

                                ""required"":true

                            },

                            ""identifier"": {

                                ""type"": ""string"",

                                ""minLength"":1,

                                ""maxLength"":20

                            },

                            ""id_type"": {

                                ""type"": ""string"",

                                ""enum"": [ ""NPI"", ""ProviderID"" ]

                            },

                            ""tax_id_number"": {

                                ""type"": ""string"",

                                ""required"":true,

                                ""minLength"":9,

                                ""maxLength"":9

                            }

                        }

                    },                                  

                    ""additionalProperties"":false,

                    ""uniqueItems"": true

                }    

            }

        }       

        ");

    }

}