Use Logiqx serializer for reading only

SabreTools.Models/Logiqx/DeviceRef.cs

@@ -4,9 +4,21 @@ using System.Xml.Serialization;
 namespace SabreTools.Models.Logiqx
 {
     [XmlRoot("device_ref")]
-    public class DeviceRef : ItemBase
+    public class DeviceRef
     {
         [XmlAttribute("name")]
         public string Name { get; set; }
+        
+        #region DO NOT USE IN PRODUCTION
+
+        /// <remarks>Should be empty</remarks>
+        [XmlAnyAttribute]
+        public XmlAttribute[]? ADDITIONAL_ATTRIBUTES { get; set; }
+
+        /// <remarks>Should be empty</remarks>
+        [XmlAnyElement]
+        public object[]? ADDITIONAL_ELEMENTS { get; set; }
+
+        #endregion
     }
 }