Start adding currently-unused models

SabreTools.Models/Listxml/Device.cs

@@ -0,0 +1,30 @@
+using System.Xml;
+using System.Xml.Serialization;
+
+namespace SabreTools.Models.Listxml
+{
+    [XmlRoot("device")]
+    public class Device
+    {
+        [XmlAttribute("type")]
+        public string Type { get; set; }
+
+        [XmlAttribute("tag")]
+        public string? Tag { get; set; }
+
+        [XmlAttribute("fixed_image")]
+        public string? FixedImage { get; set; }
+
+        [XmlAttribute("mandatory")]
+        public string? Mandatory { get; set; }
+
+        [XmlAttribute("interface")]
+        public string? Interface { get; set; }
+
+        [XmlElement("instance")]
+        public Instance? Instance { get; set; }
+
+        [XmlElement("extension")]
+        public Extension[]? Extension { get; set; }
+    }
+}