Add timestamps to ISO tables.

Marechai.Database/Models/Iso31661Numeric.cs

@@ -23,8 +23,10 @@
 // Copyright © 2003-2020 Natalia Portillo
 *******************************************************************************/
 
+using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Marechai.Database.Models
 {
@@ -32,6 +34,11 @@ namespace Marechai.Database.Models
     {
         public Iso31661Numeric() => Companies = new HashSet<Company>();
 
+        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+        public DateTime CreatedOn { get; set; }
+        [DatabaseGenerated(DatabaseGeneratedOption.Computed)]
+        public DateTime UpdatedOn { get; set; }
+
         [Required]
         public short Id { get; set; }
         [Required, StringLength(64)]

Marechai.Database/Models/Iso4217.cs

@@ -1,3 +1,28 @@
+/******************************************************************************
+// MARECHAI: Master repository of computing history artifacts information
+// ----------------------------------------------------------------------------
+//
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This program is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as
+//     published by the Free Software Foundation, either version 3 of the
+//     License, or (at your option) any later version.
+//
+//     This program is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2003-2020 Natalia Portillo
+*******************************************************************************/
+
 using System;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
@@ -6,6 +31,11 @@ namespace Marechai.Database.Models
 {
     public class Iso4217
     {
+        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+        public DateTime CreatedOn { get; set; }
+        [DatabaseGenerated(DatabaseGeneratedOption.Computed)]
+        public DateTime UpdatedOn { get; set; }
+
         [StringLength(3), Required, Key]
         public string Code { get; set; }
         [Column(TypeName = "smallint(3)"), Required]

Marechai.Database/Models/Iso639.cs

@@ -23,6 +23,7 @@
 // Copyright © 2003-2020 Natalia Portillo
 *******************************************************************************/
 
+using System;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
@@ -31,6 +32,11 @@ namespace Marechai.Database.Models
     /// <summary>ISO-639 codes</summary>
     public class Iso639
     {
+        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+        public DateTime CreatedOn { get; set; }
+        [DatabaseGenerated(DatabaseGeneratedOption.Computed)]
+        public DateTime UpdatedOn { get; set; }
+
         [Column(TypeName = "char(3)"), Key, Required]
         public string Id { get; set; }
         [Column(TypeName = "char(3)")]