diff --git a/SabreTools.Library/DatFiles/DatHeader.cs b/SabreTools.Library/DatFiles/DatHeader.cs
index 0f5b72ed..bbe7c5fd 100644
--- a/SabreTools.Library/DatFiles/DatHeader.cs
+++ b/SabreTools.Library/DatFiles/DatHeader.cs
@@ -239,8 +239,15 @@ namespace SabreTools.Library.DatFiles
         /// <summary>
         /// OfflineList info list
         /// </summary>
+        [JsonProperty("infos")]
         public List<Tuple<string, bool?, bool?, bool?>> Infos { get; set; }
 
+        /// <summary>
+        /// OfflineList can-open extensions
+        /// </summary>
+        [JsonProperty("canopen")]
+        public List<string> CanOpen { get; set; }
+
         /// <summary>
         /// Rom title
         /// </summary>
diff --git a/SabreTools.Library/DatFiles/Json.cs b/SabreTools.Library/DatFiles/Json.cs
index d99d7503..652a5787 100644
--- a/SabreTools.Library/DatFiles/Json.cs
+++ b/SabreTools.Library/DatFiles/Json.cs
@@ -311,6 +311,16 @@ namespace SabreTools.Library.DatFiles
 
                         break;
 
+                    case "canopen":
+                        Header.CanOpen = new List<string>();
+                        jtr.Read(); // Start Array
+                        while (!sr.EndOfStream && jtr.TokenType != JsonToken.EndArray)
+                        {
+                            Header.CanOpen.Add(jtr.ReadAsString());
+                        }
+
+                        break;
+
                     case "romtitle":
                         content = jtr.ReadAsString();
                         Header.RomTitle = (Header.MameConfig == null ? content : Header.RomTitle);
@@ -1165,6 +1175,18 @@ namespace SabreTools.Library.DatFiles
                     jtw.WriteEndArray();
                 }
 
+                if (Header.CanOpen != null)
+                {
+                    jtw.WritePropertyName("canopen");
+                    jtw.WriteStartArray();
+                    foreach (string extension in Header.CanOpen)
+                    {
+                        jtw.WriteValue(extension);
+                    }
+
+                    jtw.WriteEndArray();
+                }
+
                 if (!string.IsNullOrWhiteSpace(Header.RomTitle))
                 {
                     jtw.WritePropertyName("romtitle");
diff --git a/SabreTools.Library/DatFiles/OfflineList.cs b/SabreTools.Library/DatFiles/OfflineList.cs
index fb753bea..0a45e939 100644
--- a/SabreTools.Library/DatFiles/OfflineList.cs
+++ b/SabreTools.Library/DatFiles/OfflineList.cs
@@ -162,7 +162,6 @@ namespace SabreTools.Library.DatFiles
                         reader.Skip();
                         break;
 
-                    // TODO: Use header values
                     case "canopen":
                         ReadCanOpen(reader.ReadSubtree());
 
@@ -170,7 +169,7 @@ namespace SabreTools.Library.DatFiles
                         reader.Skip();
                         break;
 
-                    // TODO: Use header values
+                    // TODO: Use all header values
                     case "newdat":
                         ReadNewDat(reader.ReadSubtree());
 
@@ -241,7 +240,7 @@ namespace SabreTools.Library.DatFiles
         private void ReadCanOpen(XmlReader reader)
         {
             // Prepare all internal variables
-            List<string> extensions = new List<string>();
+            Header.CanOpen = new List<string>();
 
             // If there's no subtree to the configuration, skip it
             if (reader == null)
@@ -264,7 +263,7 @@ namespace SabreTools.Library.DatFiles
                 switch (reader.Name.ToLowerInvariant())
                 {
                     case "extension":
-                        extensions.Add(reader.ReadElementContentAsString());
+                        Header.CanOpen.Add(reader.ReadElementContentAsString());
                         break;
 
                     default:
@@ -783,9 +782,18 @@ namespace SabreTools.Library.DatFiles
                     xtw.WriteEndElement();
                 }
                 
-                xtw.WriteStartElement("canOpen");
-                xtw.WriteElementString("extension", ".bin");
-                xtw.WriteEndElement();
+                if (Header.CanOpen != null)
+                {
+                    xtw.WriteStartElement("canOpen");
+
+                    foreach (string extension in Header.CanOpen)
+                    {
+                        xtw.WriteElementString("extension", extension);
+                    }
+
+                    // End canOpen
+                    xtw.WriteEndElement();
+                }
 
                 xtw.WriteStartElement("newDat");
                 xtw.WriteElementString("datVersionURL", Header.Url);
diff --git a/SabreTools.Library/DatFiles/SeparatedValue.cs b/SabreTools.Library/DatFiles/SeparatedValue.cs
index 57a4e01c..b4528601 100644
--- a/SabreTools.Library/DatFiles/SeparatedValue.cs
+++ b/SabreTools.Library/DatFiles/SeparatedValue.cs
@@ -222,7 +222,19 @@ namespace SabreTools.Library.DatFiles
                             Header.ScreenshotsHeight = (Header.ScreenshotsHeight == null ? value : Header.ScreenshotsHeight);
                             break;
 
-                        // TODO: Figure out how Header.Infos could be read in
+                        case "DatFile.Infos":
+                            // TODO: Figure out how Header.Infos could be read in
+                            break;
+
+                        case "DatFile.CanOpen":
+                            Header.CanOpen = new List<string>();
+                            var extensions = value.Split(';');
+                            foreach (var extension in extensions)
+                            {
+                                Header.CanOpen.Add(extension);
+                            }
+
+                            break;
 
                         case "DatFile.RomTitle":
                             Header.RomTitle = (Header.RomTitle == null ? value : Header.RomTitle);
@@ -814,6 +826,22 @@ namespace SabreTools.Library.DatFiles
                 case "screenshots-height":
                     return "DatFile.ScreenshotsHeight";
 
+                case "offlineinfos":
+                case "offline infos":
+                case "offline-infos":
+                case "olinfos":
+                case "ol infos":
+                case "ol-infos":
+                case "offlinelistinfos":
+                case "offlinelist infos":
+                case "offlinelist-infos":
+                    return "DatFile.Infos";
+
+                case "canopen":
+                case "can open":
+                case "can-open":
+                    return "DatFile.CanOpen";
+
                 case "romtitle":
                 case "rom title":
                 case "rom-title":