diff --git a/CrossModel/Listxml.Deserializer.cs b/CrossModel/Listxml.Deserializer.cs
new file mode 100644
index 00000000..1f5328a5
--- /dev/null
+++ b/CrossModel/Listxml.Deserializer.cs
@@ -0,0 +1,830 @@
+using System.Linq;
+using SabreTools.Models.Listxml;
+
+namespace SabreTools.Serialization.CrossModel
+{
+    public partial class Listxml : IModelSerializer<Mame, Models.Metadata.MetadataFile>
+    {
+        /// <inheritdoc/>
+#if NET48
+        public Mame Deserialize(Models.Metadata.MetadataFile obj)
+#else
+        public Mame? Deserialize(Models.Metadata.MetadataFile? obj)
+#endif
+        {
+            if (obj == null)
+                return null;
+
+            var header = obj.Read<Models.Metadata.Header>(Models.Metadata.MetadataFile.HeaderKey);
+            var mame = header != null ? ConvertMameFromInternalModel(header) : new Mame();
+
+            var machines = obj.Read<Models.Metadata.Machine[]>(Models.Metadata.MetadataFile.MachineKey);
+            if (machines != null && machines.Any())
+            {
+                mame.Game = machines
+                    .Where(m => m != null)
+                    .Select(ConvertMachineFromInternalModel)
+                    .ToArray();
+            }
+
+            return mame;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.MetadataFile"/> to <cref="Models.Listxml.Mame"/>
+        /// </summary>
+#if NET48
+        private static Mame ConvertMameFromInternalModel(Models.Metadata.MetadataFile item)
+#else
+        public static Mame? ConvertMameFromInternalModel(Models.Metadata.MetadataFile? item)
+#endif
+        {
+            if (item == null)
+                return null;
+
+            var header = item.Read<Models.Metadata.Header>(Models.Metadata.MetadataFile.HeaderKey);
+            var mame = header != null ? ConvertMameFromInternalModel(header) : new Mame();
+
+            var machines = item.Read<Models.Metadata.Machine[]>(Models.Metadata.MetadataFile.MachineKey);
+            if (machines != null && machines.Any())
+            {
+                mame.Game = machines
+                    .Where(m => m != null)
+                    .Select(ConvertMachineFromInternalModel)
+                    .ToArray();
+            }
+
+            return mame;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Header"/> to <cref="Models.Listxml.Mame"/>
+        /// </summary>
+        private static Mame ConvertMameFromInternalModel(Models.Metadata.Header item)
+        {
+            var mame = new Mame
+            {
+                Build = item.ReadString(Models.Metadata.Header.BuildKey),
+                Debug = item.ReadString(Models.Metadata.Header.DebugKey),
+                MameConfig = item.ReadString(Models.Metadata.Header.MameConfigKey),
+            };
+
+            return mame;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Machine"/> to <cref="Models.Listxml.GameBase"/>
+        /// </summary>
+        internal static GameBase ConvertMachineFromInternalModel(Models.Metadata.Machine item)
+        {
+            var machine = new Machine
+            {
+                Name = item.ReadString(Models.Metadata.Machine.NameKey),
+                SourceFile = item.ReadString(Models.Metadata.Machine.SourceFileKey),
+                IsBios = item.ReadString(Models.Metadata.Machine.IsBiosKey),
+                IsDevice = item.ReadString(Models.Metadata.Machine.IsDeviceKey),
+                IsMechanical = item.ReadString(Models.Metadata.Machine.IsMechanicalKey),
+                Runnable = item.ReadString(Models.Metadata.Machine.RunnableKey),
+                CloneOf = item.ReadString(Models.Metadata.Machine.CloneOfKey),
+                RomOf = item.ReadString(Models.Metadata.Machine.RomOfKey),
+                SampleOf = item.ReadString(Models.Metadata.Machine.SampleOfKey),
+                Description = item.ReadString(Models.Metadata.Machine.DescriptionKey),
+                Year = item.ReadString(Models.Metadata.Machine.YearKey),
+                Manufacturer = item.ReadString(Models.Metadata.Machine.ManufacturerKey),
+                History = item.ReadString(Models.Metadata.Machine.HistoryKey),
+            };
+
+            var biosSets = item.Read<Models.Metadata.BiosSet[]>(Models.Metadata.Machine.BiosSetKey);
+            if (biosSets != null && biosSets.Any())
+            {
+                machine.BiosSet = biosSets
+                    .Where(b => b != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var roms = item.Read<Models.Metadata.Rom[]>(Models.Metadata.Machine.RomKey);
+            if (roms != null && roms.Any())
+            {
+                machine.Rom = roms
+                    .Where(r => r != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var disks = item.Read<Models.Metadata.Disk[]>(Models.Metadata.Machine.DiskKey);
+            if (disks != null && disks.Any())
+            {
+                machine.Disk = disks
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var deviceRefs = item.Read<Models.Metadata.DeviceRef[]>(Models.Metadata.Machine.DeviceRefKey);
+            if (deviceRefs != null && deviceRefs.Any())
+            {
+                machine.DeviceRef = deviceRefs
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var samples = item.Read<Models.Metadata.Sample[]>(Models.Metadata.Machine.SampleKey);
+            if (samples != null && samples.Any())
+            {
+                machine.Sample = samples
+                    .Where(s => s != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var chips = item.Read<Models.Metadata.Chip[]>(Models.Metadata.Machine.ChipKey);
+            if (chips != null && chips.Any())
+            {
+                machine.Chip = chips
+                    .Where(c => c != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var displays = item.Read<Models.Metadata.Display[]>(Models.Metadata.Machine.DisplayKey);
+            if (displays != null && displays.Any())
+            {
+                machine.Display = displays
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var videos = item.Read<Models.Metadata.Video[]>(Models.Metadata.Machine.VideoKey);
+            if (videos != null && videos.Any())
+            {
+                machine.Video = videos
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var sound = item.Read<Models.Metadata.Sound>(Models.Metadata.Machine.SoundKey);
+            if (sound != null)
+                machine.Sound = ConvertFromInternalModel(sound);
+
+            var input = item.Read<Models.Metadata.Input>(Models.Metadata.Machine.InputKey);
+            if (input != null)
+                machine.Input = ConvertFromInternalModel(input);
+
+            var dipSwitches = item.Read<Models.Metadata.DipSwitch[]>(Models.Metadata.Machine.DipSwitchKey);
+            if (dipSwitches != null && dipSwitches.Any())
+            {
+                machine.DipSwitch = dipSwitches
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var configurations = item.Read<Models.Metadata.Configuration[]>(Models.Metadata.Machine.ConfigurationKey);
+            if (configurations != null && configurations.Any())
+            {
+                machine.Configuration = configurations
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var ports = item.Read<Models.Metadata.Port[]>(Models.Metadata.Machine.PortKey);
+            if (ports != null && ports.Any())
+            {
+                machine.Port = ports
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var adjusters = item.Read<Models.Metadata.Adjuster[]>(Models.Metadata.Machine.AdjusterKey);
+            if (adjusters != null && adjusters.Any())
+            {
+                machine.Adjuster = adjusters
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var driver = item.Read<Models.Metadata.Driver>(Models.Metadata.Machine.DriverKey);
+            if (driver != null)
+                machine.Driver = ConvertFromInternalModel(driver);
+
+            var features = item.Read<Models.Metadata.Feature[]>(Models.Metadata.Machine.FeatureKey);
+            if (features != null && features.Any())
+            {
+                machine.Feature = features
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var devices = item.Read<Models.Metadata.Device[]>(Models.Metadata.Machine.DeviceKey);
+            if (devices != null && devices.Any())
+            {
+                machine.Device = devices
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var slots = item.Read<Models.Metadata.Slot[]>(Models.Metadata.Machine.SlotKey);
+            if (slots != null && slots.Any())
+            {
+                machine.Slot = slots
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var softwareLists = item.Read<Models.Metadata.SoftwareList[]>(Models.Metadata.Machine.SoftwareListKey);
+            if (softwareLists != null && softwareLists.Any())
+            {
+                machine.SoftwareList = softwareLists
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var ramOptions = item.Read<Models.Metadata.RamOption[]>(Models.Metadata.Machine.RamOptionKey);
+            if (ramOptions != null && ramOptions.Any())
+            {
+                machine.RamOption = ramOptions
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            return machine;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Adjuster"/> to <cref="Models.Listxml.Adjuster"/>
+        /// </summary>
+        private static Adjuster ConvertFromInternalModel(Models.Metadata.Adjuster item)
+        {
+            var adjuster = new Adjuster
+            {
+                Name = item.ReadString(Models.Metadata.Adjuster.NameKey),
+                Default = item.ReadString(Models.Metadata.Adjuster.DefaultKey),
+            };
+
+            var condition = item.Read<Models.Metadata.Condition>(Models.Metadata.Adjuster.ConditionKey);
+            if (condition != null)
+                adjuster.Condition = ConvertFromInternalModel(condition);
+
+            return adjuster;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Analog"/> to <cref="Models.Listxml.Analog"/>
+        /// </summary>
+        private static Analog ConvertFromInternalModel(Models.Metadata.Analog item)
+        {
+            var analog = new Analog
+            {
+                Mask = item.ReadString(Models.Metadata.Analog.MaskKey),
+            };
+            return analog;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.BiosSet"/> to <cref="Models.Listxml.BiosSet"/>
+        /// </summary>
+        private static BiosSet ConvertFromInternalModel(Models.Metadata.BiosSet item)
+        {
+            var biosset = new BiosSet
+            {
+                Name = item.ReadString(Models.Metadata.BiosSet.NameKey),
+                Description = item.ReadString(Models.Metadata.BiosSet.DescriptionKey),
+                Default = item.ReadString(Models.Metadata.BiosSet.DefaultKey),
+            };
+            return biosset;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Chip"/> to <cref="Models.Listxml.Chip"/>
+        /// </summary>
+        private static Chip ConvertFromInternalModel(Models.Metadata.Chip item)
+        {
+            var chip = new Chip
+            {
+                Name = item.ReadString(Models.Metadata.Chip.NameKey),
+                Tag = item.ReadString(Models.Metadata.Chip.TagKey),
+                Type = item.ReadString(Models.Metadata.Chip.TypeKey),
+                SoundOnly = item.ReadString(Models.Metadata.Chip.SoundOnlyKey),
+                Clock = item.ReadString(Models.Metadata.Chip.ClockKey),
+            };
+            return chip;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Condition"/> to <cref="Models.Listxml.Condition"/>
+        /// </summary>
+        private static Condition ConvertFromInternalModel(Models.Metadata.Condition item)
+        {
+            var condition = new Condition
+            {
+                Tag = item.ReadString(Models.Metadata.Condition.TagKey),
+                Mask = item.ReadString(Models.Metadata.Condition.MaskKey),
+                Relation = item.ReadString(Models.Metadata.Condition.RelationKey),
+                Value = item.ReadString(Models.Metadata.Condition.ValueKey),
+            };
+            return condition;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Configuration"/> to <cref="Models.Listxml.Configuration"/>
+        /// </summary>
+        private static Configuration ConvertFromInternalModel(Models.Metadata.Configuration item)
+        {
+            var configuration = new Configuration
+            {
+                Name = item.ReadString(Models.Metadata.Configuration.NameKey),
+                Tag = item.ReadString(Models.Metadata.Configuration.TagKey),
+                Mask = item.ReadString(Models.Metadata.Configuration.MaskKey),
+            };
+
+            var condition = item.Read<Models.Metadata.Condition>(Models.Metadata.Configuration.ConditionKey);
+            if (condition != null)
+                configuration.Condition = ConvertFromInternalModel(condition);
+
+            var confLocations = item.Read<Models.Metadata.ConfLocation[]>(Models.Metadata.Configuration.ConfLocationKey);
+            if (confLocations != null && confLocations.Any())
+            {
+                configuration.ConfLocation = confLocations
+                    .Where(c => c != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var confSettings = item.Read<Models.Metadata.ConfSetting[]>(Models.Metadata.Configuration.ConfSettingKey);
+            if (confSettings != null && confSettings.Any())
+            {
+                configuration.ConfSetting = confSettings
+                    .Where(c => c != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            return configuration;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.ConfLocation"/> to <cref="Models.Listxml.ConfLocation"/>
+        /// </summary>
+        private static ConfLocation ConvertFromInternalModel(Models.Metadata.ConfLocation item)
+        {
+            var confLocation = new ConfLocation
+            {
+                Name = item.ReadString(Models.Metadata.ConfLocation.NameKey),
+                Number = item.ReadString(Models.Metadata.ConfLocation.NumberKey),
+                Inverted = item.ReadString(Models.Metadata.ConfLocation.InvertedKey),
+            };
+            return confLocation;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.ConfSetting"/> to <cref="Models.Listxml.ConfSetting"/>
+        /// </summary>
+        private static ConfSetting ConvertFromInternalModel(Models.Metadata.ConfSetting item)
+        {
+            var confSetting = new ConfSetting
+            {
+                Name = item.ReadString(Models.Metadata.ConfSetting.NameKey),
+                Value = item.ReadString(Models.Metadata.ConfSetting.ValueKey),
+                Default = item.ReadString(Models.Metadata.ConfSetting.DefaultKey),
+            };
+
+            var condition = item.Read<Models.Metadata.Condition>(Models.Metadata.ConfSetting.ConditionKey);
+            if (condition != null)
+                confSetting.Condition = ConvertFromInternalModel(condition);
+
+            return confSetting;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Control"/> to <cref="Models.Listxml.Control"/>
+        /// </summary>
+        private static Control ConvertFromInternalModel(Models.Metadata.Control item)
+        {
+            var control = new Control
+            {
+                Type = item.ReadString(Models.Metadata.Control.TypeKey),
+                Player = item.ReadString(Models.Metadata.Control.PlayerKey),
+                Buttons = item.ReadString(Models.Metadata.Control.ButtonsKey),
+                ReqButtons = item.ReadString(Models.Metadata.Control.ReqButtonsKey),
+                Minimum = item.ReadString(Models.Metadata.Control.MinimumKey),
+                Maximum = item.ReadString(Models.Metadata.Control.MaximumKey),
+                Sensitivity = item.ReadString(Models.Metadata.Control.SensitivityKey),
+                KeyDelta = item.ReadString(Models.Metadata.Control.KeyDeltaKey),
+                Reverse = item.ReadString(Models.Metadata.Control.ReverseKey),
+                Ways = item.ReadString(Models.Metadata.Control.WaysKey),
+                Ways2 = item.ReadString(Models.Metadata.Control.Ways2Key),
+                Ways3 = item.ReadString(Models.Metadata.Control.Ways3Key),
+            };
+            return control;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Device"/> to <cref="Models.Listxml.Device"/>
+        /// </summary>
+        private static Device ConvertFromInternalModel(Models.Metadata.Device item)
+        {
+            var device = new Device
+            {
+                Type = item.ReadString(Models.Metadata.Device.TypeKey),
+                Tag = item.ReadString(Models.Metadata.Device.TagKey),
+                FixedImage = item.ReadString(Models.Metadata.Device.FixedImageKey),
+                Mandatory = item.ReadString(Models.Metadata.Device.MandatoryKey),
+                Interface = item.ReadString(Models.Metadata.Device.InterfaceKey),
+            };
+
+            var instance = item.Read<Models.Metadata.Instance>(Models.Metadata.Device.InstanceKey);
+            if (instance != null)
+                device.Instance = ConvertFromInternalModel(instance);
+
+            var extensions = item.Read<Models.Metadata.Extension[]>(Models.Metadata.Device.ExtensionKey);
+            if (extensions != null && extensions.Any())
+            {
+                device.Extension = extensions
+                    .Where(e => e != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            return device;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.DeviceRef"/> to <cref="Models.Listxml.DeviceRef"/>
+        /// </summary>
+        private static DeviceRef ConvertFromInternalModel(Models.Metadata.DeviceRef item)
+        {
+            var deviceRef = new DeviceRef
+            {
+                Name = item.ReadString(Models.Metadata.DeviceRef.NameKey),
+            };
+            return deviceRef;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.DipLocation"/> to <cref="Models.Listxml.DipLocation"/>
+        /// </summary>
+        private static DipLocation ConvertFromInternalModel(Models.Metadata.DipLocation item)
+        {
+            var dipLocation = new DipLocation
+            {
+                Name = item.ReadString(Models.Metadata.DipLocation.NameKey),
+                Number = item.ReadString(Models.Metadata.DipLocation.NumberKey),
+                Inverted = item.ReadString(Models.Metadata.DipLocation.InvertedKey),
+            };
+            return dipLocation;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.DipSwitch"/> to <cref="Models.Listxml.DipSwitch"/>
+        /// </summary>
+        private static DipSwitch ConvertFromInternalModel(Models.Metadata.DipSwitch item)
+        {
+            var dipSwitch = new DipSwitch
+            {
+                Name = item.ReadString(Models.Metadata.DipSwitch.NameKey),
+                Tag = item.ReadString(Models.Metadata.DipSwitch.TagKey),
+                Mask = item.ReadString(Models.Metadata.DipSwitch.MaskKey),
+            };
+
+            var condition = item.Read<Models.Metadata.Condition>(Models.Metadata.DipSwitch.ConditionKey);
+            if (condition != null)
+                dipSwitch.Condition = ConvertFromInternalModel(condition);
+
+            var dipLocations = item.Read<Models.Metadata.DipLocation[]>(Models.Metadata.DipSwitch.DipLocationKey);
+            if (dipLocations != null && dipLocations.Any())
+            {
+                dipSwitch.DipLocation = dipLocations
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            var dipValues = item.Read<Models.Metadata.DipValue[]>(Models.Metadata.DipSwitch.DipValueKey);
+            if (dipValues != null && dipValues.Any())
+            {
+                dipSwitch.DipValue = dipValues
+                    .Where(d => d != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            return dipSwitch;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.DipValue"/> to <cref="Models.Listxml.DipValue"/>
+        /// </summary>
+        private static DipValue ConvertFromInternalModel(Models.Metadata.DipValue item)
+        {
+            var dipValue = new DipValue
+            {
+                Name = item.ReadString(Models.Metadata.DipValue.NameKey),
+                Value = item.ReadString(Models.Metadata.DipValue.ValueKey),
+                Default = item.ReadString(Models.Metadata.DipValue.DefaultKey),
+            };
+
+            var condition = item.Read<Models.Metadata.Condition>(Models.Metadata.DipValue.ConditionKey);
+            if (condition != null)
+                dipValue.Condition = ConvertFromInternalModel(condition);
+
+            return dipValue;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Disk"/> to <cref="Models.Listxml.Disk"/>
+        /// </summary>
+        private static Disk ConvertFromInternalModel(Models.Metadata.Disk item)
+        {
+            var disk = new Disk
+            {
+                Name = item.ReadString(Models.Metadata.Disk.NameKey),
+                MD5 = item.ReadString(Models.Metadata.Disk.MD5Key),
+                SHA1 = item.ReadString(Models.Metadata.Disk.SHA1Key),
+                Merge = item.ReadString(Models.Metadata.Disk.MergeKey),
+                Region = item.ReadString(Models.Metadata.Disk.RegionKey),
+                Index = item.ReadString(Models.Metadata.Disk.IndexKey),
+                Writable = item.ReadString(Models.Metadata.Disk.WritableKey),
+                Status = item.ReadString(Models.Metadata.Disk.StatusKey),
+                Optional = item.ReadString(Models.Metadata.Disk.OptionalKey),
+            };
+            return disk;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Display"/> to <cref="Models.Listxml.Display"/>
+        /// </summary>
+        private static Display ConvertFromInternalModel(Models.Metadata.Display item)
+        {
+            var display = new Display
+            {
+                Tag = item.ReadString(Models.Metadata.Display.TagKey),
+                Type = item.ReadString(Models.Metadata.Display.TypeKey),
+                Rotate = item.ReadString(Models.Metadata.Display.RotateKey),
+                FlipX = item.ReadString(Models.Metadata.Display.FlipXKey),
+                Width = item.ReadString(Models.Metadata.Display.WidthKey),
+                Height = item.ReadString(Models.Metadata.Display.HeightKey),
+                Refresh = item.ReadString(Models.Metadata.Display.RefreshKey),
+                PixClock = item.ReadString(Models.Metadata.Display.PixClockKey),
+                HTotal = item.ReadString(Models.Metadata.Display.HTotalKey),
+                HBEnd = item.ReadString(Models.Metadata.Display.HBEndKey),
+                HBStart = item.ReadString(Models.Metadata.Display.HBStartKey),
+                VTotal = item.ReadString(Models.Metadata.Display.VTotalKey),
+                VBEnd = item.ReadString(Models.Metadata.Display.VBEndKey),
+                VBStart = item.ReadString(Models.Metadata.Display.VBStartKey),
+            };
+            return display;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Driver"/> to <cref="Models.Listxml.Driver"/>
+        /// </summary>
+        private static Driver ConvertFromInternalModel(Models.Metadata.Driver item)
+        {
+            var driver = new Driver
+            {
+                Status = item.ReadString(Models.Metadata.Driver.StatusKey),
+                Color = item.ReadString(Models.Metadata.Driver.ColorKey),
+                Sound = item.ReadString(Models.Metadata.Driver.SoundKey),
+                PaletteSize = item.ReadString(Models.Metadata.Driver.PaletteSizeKey),
+                Emulation = item.ReadString(Models.Metadata.Driver.EmulationKey),
+                Cocktail = item.ReadString(Models.Metadata.Driver.CocktailKey),
+                SaveState = item.ReadString(Models.Metadata.Driver.SaveStateKey),
+                RequiresArtwork = item.ReadString(Models.Metadata.Driver.RequiresArtworkKey),
+                Unofficial = item.ReadString(Models.Metadata.Driver.UnofficialKey),
+                NoSoundHardware = item.ReadString(Models.Metadata.Driver.NoSoundHardwareKey),
+                Incomplete = item.ReadString(Models.Metadata.Driver.IncompleteKey),
+            };
+            return driver;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Extension"/> to <cref="Models.Listxml.Extension"/>
+        /// </summary>
+        private static Extension ConvertFromInternalModel(Models.Metadata.Extension item)
+        {
+            var extension = new Extension
+            {
+                Name = item.ReadString(Models.Metadata.Extension.NameKey),
+            };
+            return extension;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Feature"/> to <cref="Models.Listxml.Feature"/>
+        /// </summary>
+        private static Feature ConvertFromInternalModel(Models.Metadata.Feature item)
+        {
+            var feature = new Feature
+            {
+                Type = item.ReadString(Models.Metadata.Feature.TypeKey),
+                Status = item.ReadString(Models.Metadata.Feature.StatusKey),
+                Overall = item.ReadString(Models.Metadata.Feature.OverallKey),
+            };
+            return feature;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Input"/> to <cref="Models.Listxml.Input"/>
+        /// </summary>
+        private static Input ConvertFromInternalModel(Models.Metadata.Input item)
+        {
+            var input = new Input
+            {
+                Service = item.ReadString(Models.Metadata.Input.ServiceKey),
+                Tilt = item.ReadString(Models.Metadata.Input.TiltKey),
+                Players = item.ReadString(Models.Metadata.Input.PlayersKey),
+                ControlAttr = item.ReadString(Models.Metadata.Input.ControlKey),
+                Buttons = item.ReadString(Models.Metadata.Input.ButtonsKey),
+                Coins = item.ReadString(Models.Metadata.Input.CoinsKey),
+            };
+
+            var controls = item.Read<Models.Metadata.Control[]>(Models.Metadata.Input.ControlKey);
+            if (controls != null && controls.Any())
+            {
+                input.Control = controls
+                    .Where(c => c != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            return input;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Instance"/> to <cref="Models.Listxml.Instance"/>
+        /// </summary>
+        private static Instance ConvertFromInternalModel(Models.Metadata.Instance item)
+        {
+            var instance = new Instance
+            {
+                Name = item.ReadString(Models.Metadata.Instance.NameKey),
+                BriefName = item.ReadString(Models.Metadata.Instance.BriefNameKey),
+            };
+            return instance;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Port"/> to <cref="Models.Listxml.Port"/>
+        /// </summary>
+        private static Port ConvertFromInternalModel(Models.Metadata.Port item)
+        {
+            var port = new Port
+            {
+                Tag = item.ReadString(Models.Metadata.Port.TagKey),
+            };
+
+            var analogs = item.Read<Models.Metadata.Analog[]>(Models.Metadata.Port.AnalogKey);
+            if (analogs != null && analogs.Any())
+            {
+                port.Analog = analogs
+                    .Where(a => a != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            return port;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.RamOption"/> to <cref="Models.Listxml.RamOption"/>
+        /// </summary>
+        private static RamOption ConvertFromInternalModel(Models.Metadata.RamOption item)
+        {
+            var ramOption = new RamOption
+            {
+                Name = item.ReadString(Models.Metadata.RamOption.NameKey),
+                Default = item.ReadString(Models.Metadata.RamOption.DefaultKey),
+                Content = item.ReadString(Models.Metadata.RamOption.ContentKey),
+            };
+            return ramOption;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Rom"/> to <cref="Models.Listxml.Rom"/>
+        /// </summary>
+        private static Rom ConvertFromInternalModel(Models.Metadata.Rom item)
+        {
+            var rom = new Rom
+            {
+                Name = item.ReadString(Models.Metadata.Rom.NameKey),
+                Bios = item.ReadString(Models.Metadata.Rom.BiosKey),
+                Size = item.ReadString(Models.Metadata.Rom.SizeKey),
+                CRC = item.ReadString(Models.Metadata.Rom.CRCKey),
+                SHA1 = item.ReadString(Models.Metadata.Rom.SHA1Key),
+                Merge = item.ReadString(Models.Metadata.Rom.MergeKey),
+                Region = item.ReadString(Models.Metadata.Rom.RegionKey),
+                Offset = item.ReadString(Models.Metadata.Rom.OffsetKey),
+                Status = item.ReadString(Models.Metadata.Rom.StatusKey),
+                Optional = item.ReadString(Models.Metadata.Rom.OptionalKey),
+                Dispose = item.ReadString(Models.Metadata.Rom.DisposeKey),
+                SoundOnly = item.ReadString(Models.Metadata.Rom.SoundOnlyKey),
+            };
+            return rom;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Sample"/> to <cref="Models.Listxml.Sample"/>
+        /// </summary>
+        private static Sample ConvertFromInternalModel(Models.Metadata.Sample item)
+        {
+            var sample = new Sample
+            {
+                Name = item.ReadString(Models.Metadata.Sample.NameKey),
+            };
+            return sample;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Slot"/> to <cref="Models.Listxml.Slot"/>
+        /// </summary>
+        private static Slot ConvertFromInternalModel(Models.Metadata.Slot item)
+        {
+            var slot = new Slot
+            {
+                Name = item.ReadString(Models.Metadata.Slot.NameKey),
+            };
+
+            var slotOptions = item.Read<Models.Metadata.SlotOption[]>(Models.Metadata.Slot.SlotOptionKey);
+            if (slotOptions != null && slotOptions.Any())
+            {
+                slot.SlotOption = slotOptions
+                    .Where(s => s != null)
+                    .Select(ConvertFromInternalModel)
+                    .ToArray();
+            }
+
+            return slot;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.SlotOption"/> to <cref="Models.Listxml.SlotOption"/>
+        /// </summary>
+        private static SlotOption ConvertFromInternalModel(Models.Metadata.SlotOption item)
+        {
+            var slotOption = new SlotOption
+            {
+                Name = item.ReadString(Models.Metadata.SlotOption.NameKey),
+                DevName = item.ReadString(Models.Metadata.SlotOption.DevNameKey),
+                Default = item.ReadString(Models.Metadata.SlotOption.DefaultKey),
+            };
+            return slotOption;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.SoftwareList"/> to <cref="Models.Listxml.SoftwareList"/>
+        /// </summary>
+        private static SoftwareList ConvertFromInternalModel(Models.Metadata.SoftwareList item)
+        {
+            var softwareList = new SoftwareList
+            {
+                Tag = item.ReadString(Models.Metadata.SoftwareList.TagKey),
+                Name = item.ReadString(Models.Metadata.SoftwareList.NameKey),
+                Status = item.ReadString(Models.Metadata.SoftwareList.StatusKey),
+                Filter = item.ReadString(Models.Metadata.SoftwareList.FilterKey),
+            };
+            return softwareList;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Sound"/> to <cref="Models.Listxml.Sound"/>
+        /// </summary>
+        private static Sound ConvertFromInternalModel(Models.Metadata.Sound item)
+        {
+            var sound = new Sound
+            {
+                Channels = item.ReadString(Models.Metadata.Sound.ChannelsKey),
+            };
+            return sound;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Video"/> to <cref="Models.Listxml.Video"/>
+        /// </summary>
+        private static Video ConvertFromInternalModel(Models.Metadata.Video item)
+        {
+            var video = new Video
+            {
+                Screen = item.ReadString(Models.Metadata.Video.ScreenKey),
+                Orientation = item.ReadString(Models.Metadata.Video.OrientationKey),
+                Width = item.ReadString(Models.Metadata.Video.WidthKey),
+                Height = item.ReadString(Models.Metadata.Video.HeightKey),
+                AspectX = item.ReadString(Models.Metadata.Video.AspectXKey),
+                AspectY = item.ReadString(Models.Metadata.Video.AspectYKey),
+                Refresh = item.ReadString(Models.Metadata.Video.RefreshKey),
+            };
+            return video;
+        }
+    }
+}
\ No newline at end of file
diff --git a/CrossModel/Listxml.Serializer.cs b/CrossModel/Listxml.Serializer.cs
new file mode 100644
index 00000000..e0085119
--- /dev/null
+++ b/CrossModel/Listxml.Serializer.cs
@@ -0,0 +1,769 @@
+using System.Linq;
+using SabreTools.Models.Listxml;
+
+namespace SabreTools.Serialization.CrossModel
+{
+    public partial class Listxml : IModelSerializer<Mame, Models.Metadata.MetadataFile>
+    {
+        /// <inheritdoc/>
+#if NET48
+        public Models.Metadata.MetadataFile Serialize(Mame item)
+#else
+        public Models.Metadata.MetadataFile? Serialize(Mame? item)
+#endif
+        {
+            if (item == null)
+                return null;
+
+            var metadataFile = new Models.Metadata.MetadataFile
+            {
+                [Models.Metadata.MetadataFile.HeaderKey] = ConvertHeaderToInternalModel(item),
+            };
+
+            if (item?.Game != null && item.Game.Any())
+            {
+                metadataFile[Models.Metadata.MetadataFile.MachineKey] = item.Game
+                    .Where(g => g != null)
+                    .Select(ConvertMachineToInternalModel)
+                    .ToArray();
+            }
+
+            return metadataFile;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Mame"/> to <cref="Models.Metadata.Header"/>
+        /// </summary>
+        private static Models.Metadata.Header ConvertHeaderToInternalModel(Mame item)
+        {
+            var header = new Models.Metadata.Header
+            {
+                [Models.Metadata.Header.BuildKey] = item.Build,
+                [Models.Metadata.Header.DebugKey] = item.Debug,
+                [Models.Metadata.Header.MameConfigKey] = item.MameConfig,
+            };
+            return header;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.GameBase"/> to <cref="Models.Metadata.Machine"/>
+        /// </summary>
+        internal static Models.Metadata.Machine ConvertMachineToInternalModel(GameBase item)
+        {
+            var machine = new Models.Metadata.Machine
+            {
+                [Models.Metadata.Machine.NameKey] = item.Name,
+                [Models.Metadata.Machine.SourceFileKey] = item.SourceFile,
+                [Models.Metadata.Machine.IsBiosKey] = item.IsBios,
+                [Models.Metadata.Machine.IsDeviceKey] = item.IsDevice,
+                [Models.Metadata.Machine.IsMechanicalKey] = item.IsMechanical,
+                [Models.Metadata.Machine.RunnableKey] = item.Runnable,
+                [Models.Metadata.Machine.CloneOfKey] = item.CloneOf,
+                [Models.Metadata.Machine.RomOfKey] = item.RomOf,
+                [Models.Metadata.Machine.SampleOfKey] = item.SampleOf,
+                [Models.Metadata.Machine.DescriptionKey] = item.Description,
+                [Models.Metadata.Machine.YearKey] = item.Year,
+                [Models.Metadata.Machine.ManufacturerKey] = item.Manufacturer,
+                [Models.Metadata.Machine.HistoryKey] = item.History,
+            };
+
+            if (item.BiosSet != null && item.BiosSet.Any())
+            {
+                machine[Models.Metadata.Machine.BiosSetKey] = item.BiosSet
+                    .Where(b => b != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Rom != null && item.Rom.Any())
+            {
+                machine[Models.Metadata.Machine.RomKey] = item.Rom
+                    .Where(r => r != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Disk != null && item.Disk.Any())
+            {
+                machine[Models.Metadata.Machine.DiskKey] = item.Disk
+                    .Where(d => d != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.DeviceRef != null && item.DeviceRef.Any())
+            {
+                machine[Models.Metadata.Machine.DeviceRefKey] = item.DeviceRef
+                    .Where(d => d != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Sample != null && item.Sample.Any())
+            {
+                machine[Models.Metadata.Machine.SampleKey] = item.Sample
+                    .Where(s => s != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Chip != null && item.Chip.Any())
+            {
+                machine[Models.Metadata.Machine.ChipKey] = item.Chip
+                    .Where(c => c != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Display != null && item.Display.Any())
+            {
+                machine[Models.Metadata.Machine.DisplayKey] = item.Display
+                    .Where(d => d != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Video != null && item.Video.Any())
+            {
+                machine[Models.Metadata.Machine.VideoKey] = item.Video
+                    .Where(v => v != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Sound != null)
+                machine[Models.Metadata.Machine.SoundKey] = ConvertToInternalModel(item.Sound);
+
+            if (item.Input != null)
+                machine[Models.Metadata.Machine.InputKey] = ConvertToInternalModel(item.Input);
+
+            if (item.DipSwitch != null && item.DipSwitch.Any())
+            {
+                machine[Models.Metadata.Machine.DipSwitchKey] = item.DipSwitch
+                    .Where(d => d != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Configuration != null && item.Configuration.Any())
+            {
+                machine[Models.Metadata.Machine.ConfigurationKey] = item.Configuration
+                    .Where(c => c != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Port != null && item.Port.Any())
+            {
+                machine[Models.Metadata.Machine.PortKey] = item.Port
+                    .Where(p => p != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Adjuster != null && item.Adjuster.Any())
+            {
+                machine[Models.Metadata.Machine.AdjusterKey] = item.Adjuster
+                    .Where(a => a != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Driver != null)
+                machine[Models.Metadata.Machine.DriverKey] = ConvertToInternalModel(item.Driver);
+
+            if (item.Feature != null && item.Feature.Any())
+            {
+                machine[Models.Metadata.Machine.FeatureKey] = item.Feature
+                    .Where(f => f != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Device != null && item.Device.Any())
+            {
+                machine[Models.Metadata.Machine.DeviceKey] = item.Device
+                    .Where(d => d != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.Slot != null && item.Slot.Any())
+            {
+                machine[Models.Metadata.Machine.SlotKey] = item.Slot
+                    .Where(s => s != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.SoftwareList != null && item.SoftwareList.Any())
+            {
+                machine[Models.Metadata.Machine.SoftwareListKey] = item.SoftwareList
+                    .Where(s => s != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.RamOption != null && item.RamOption.Any())
+            {
+                machine[Models.Metadata.Machine.RamOptionKey] = item.RamOption
+                    .Where(r => r != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            return machine;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Adjuster"/> to <cref="Models.Metadata.Adjuster"/>
+        /// </summary>
+        private static Models.Metadata.Adjuster ConvertToInternalModel(Adjuster item)
+        {
+            var adjuster = new Models.Metadata.Adjuster
+            {
+                [Models.Metadata.Adjuster.NameKey] = item.Name,
+                [Models.Metadata.Adjuster.DefaultKey] = item.Default,
+            };
+
+            if (item.Condition != null)
+                adjuster[Models.Metadata.Adjuster.ConditionKey] = ConvertToInternalModel(item.Condition);
+
+            return adjuster;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Analog"/> to <cref="Models.Metadata.Analog"/>
+        /// </summary>
+        private static Models.Metadata.Analog ConvertToInternalModel(Analog item)
+        {
+            var analog = new Models.Metadata.Analog
+            {
+                [Models.Metadata.Analog.MaskKey] = item.Mask,
+            };
+            return analog;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.BiosSet"/> to <cref="Models.Metadata.BiosSet"/>
+        /// </summary>
+        private static Models.Metadata.BiosSet ConvertToInternalModel(BiosSet item)
+        {
+            var biosset = new Models.Metadata.BiosSet
+            {
+                [Models.Metadata.BiosSet.NameKey] = item.Name,
+                [Models.Metadata.BiosSet.DescriptionKey] = item.Description,
+                [Models.Metadata.BiosSet.DefaultKey] = item.Default,
+            };
+            return biosset;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Chip"/> to <cref="Models.Metadata.Chip"/>
+        /// </summary>
+        private static Models.Metadata.Chip ConvertToInternalModel(Chip item)
+        {
+            var chip = new Models.Metadata.Chip
+            {
+                [Models.Metadata.Chip.NameKey] = item.Name,
+                [Models.Metadata.Chip.TagKey] = item.Tag,
+                [Models.Metadata.Chip.TypeKey] = item.Type,
+                [Models.Metadata.Chip.SoundOnlyKey] = item.SoundOnly,
+                [Models.Metadata.Chip.ClockKey] = item.Clock,
+            };
+            return chip;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Condition"/> to <cref="Models.Metadata.Condition"/>
+        /// </summary>
+        private static Models.Metadata.Condition ConvertToInternalModel(Condition item)
+        {
+            var condition = new Models.Metadata.Condition
+            {
+                [Models.Metadata.Condition.TagKey] = item.Tag,
+                [Models.Metadata.Condition.MaskKey] = item.Mask,
+                [Models.Metadata.Condition.RelationKey] = item.Relation,
+                [Models.Metadata.Condition.ValueKey] = item.Value,
+            };
+            return condition;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Configuration"/> to <cref="Models.Metadata.Configuration"/>
+        /// </summary>
+        private static Models.Metadata.Configuration ConvertToInternalModel(Configuration item)
+        {
+            var configuration = new Models.Metadata.Configuration
+            {
+                [Models.Metadata.Configuration.NameKey] = item.Name,
+                [Models.Metadata.Configuration.TagKey] = item.Tag,
+                [Models.Metadata.Configuration.MaskKey] = item.Mask,
+            };
+
+            if (item.Condition != null)
+                configuration[Models.Metadata.Configuration.ConditionKey] = ConvertToInternalModel(item.Condition);
+
+            if (item.ConfLocation != null && item.ConfLocation.Any())
+            {
+                configuration[Models.Metadata.Configuration.ConfLocationKey] = item.ConfLocation
+                    .Where(c => c != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.ConfSetting != null && item.ConfSetting.Any())
+            {
+                configuration[Models.Metadata.Configuration.ConfSettingKey] = item.ConfSetting
+                    .Where(c => c != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            return configuration;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.ConfLocation"/> to <cref="Models.Metadata.ConfLocation"/>
+        /// </summary>
+        private static Models.Metadata.ConfLocation ConvertToInternalModel(ConfLocation item)
+        {
+            var confLocation = new Models.Metadata.ConfLocation
+            {
+                [Models.Metadata.ConfLocation.NameKey] = item.Name,
+                [Models.Metadata.ConfLocation.NumberKey] = item.Number,
+                [Models.Metadata.ConfLocation.InvertedKey] = item.Inverted,
+            };
+            return confLocation;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.ConfSetting"/> to <cref="Models.Metadata.ConfSetting"/>
+        /// </summary>
+        private static Models.Metadata.ConfSetting ConvertToInternalModel(ConfSetting item)
+        {
+            var confSetting = new Models.Metadata.ConfSetting
+            {
+                [Models.Metadata.ConfSetting.NameKey] = item.Name,
+                [Models.Metadata.ConfSetting.ValueKey] = item.Value,
+                [Models.Metadata.ConfSetting.DefaultKey] = item.Default,
+            };
+
+            if (item.Condition != null)
+                confSetting[Models.Metadata.ConfSetting.ConditionKey] = ConvertToInternalModel(item.Condition);
+
+            return confSetting;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Control"/> to <cref="Models.Metadata.Control"/>
+        /// </summary>
+        private static Models.Metadata.Control ConvertToInternalModel(Control item)
+        {
+            var control = new Models.Metadata.Control
+            {
+                [Models.Metadata.Control.TypeKey] = item.Type,
+                [Models.Metadata.Control.PlayerKey] = item.Player,
+                [Models.Metadata.Control.ButtonsKey] = item.Buttons,
+                [Models.Metadata.Control.ReqButtonsKey] = item.ReqButtons,
+                [Models.Metadata.Control.MinimumKey] = item.Minimum,
+                [Models.Metadata.Control.MaximumKey] = item.Maximum,
+                [Models.Metadata.Control.SensitivityKey] = item.Sensitivity,
+                [Models.Metadata.Control.KeyDeltaKey] = item.KeyDelta,
+                [Models.Metadata.Control.ReverseKey] = item.Reverse,
+                [Models.Metadata.Control.WaysKey] = item.Ways,
+                [Models.Metadata.Control.Ways2Key] = item.Ways2,
+                [Models.Metadata.Control.Ways3Key] = item.Ways3,
+            };
+            return control;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Device"/> to <cref="Models.Metadata.Device"/>
+        /// </summary>
+        private static Models.Metadata.Device ConvertToInternalModel(Device item)
+        {
+            var device = new Models.Metadata.Device
+            {
+                [Models.Metadata.Device.TypeKey] = item.Type,
+                [Models.Metadata.Device.TagKey] = item.Tag,
+                [Models.Metadata.Device.FixedImageKey] = item.FixedImage,
+                [Models.Metadata.Device.MandatoryKey] = item.Mandatory,
+                [Models.Metadata.Device.InterfaceKey] = item.Interface,
+            };
+
+            if (item.Instance != null)
+                device[Models.Metadata.Device.InstanceKey] = ConvertToInternalModel(item.Instance);
+
+            if (item.Extension != null && item.Extension.Any())
+            {
+                device[Models.Metadata.Device.ExtensionKey] = item.Extension
+                    .Where(e => e != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            return device;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.DeviceRef"/> to <cref="Models.Metadata.DeviceRef"/>
+        /// </summary>
+        private static Models.Metadata.DeviceRef ConvertToInternalModel(DeviceRef item)
+        {
+            var deviceRef = new Models.Metadata.DeviceRef
+            {
+                [Models.Metadata.DeviceRef.NameKey] = item.Name,
+            };
+            return deviceRef;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.DipLocation"/> to <cref="Models.Metadata.DipLocation"/>
+        /// </summary>
+        private static Models.Metadata.DipLocation ConvertToInternalModel(DipLocation item)
+        {
+            var dipLocation = new Models.Metadata.DipLocation
+            {
+                [Models.Metadata.DipLocation.NameKey] = item.Name,
+                [Models.Metadata.DipLocation.NumberKey] = item.Number,
+                [Models.Metadata.DipLocation.InvertedKey] = item.Inverted,
+            };
+            return dipLocation;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.DipSwitch"/> to <cref="Models.Metadata.DipSwitch"/>
+        /// </summary>
+        private static Models.Metadata.DipSwitch ConvertToInternalModel(DipSwitch item)
+        {
+            var dipSwitch = new Models.Metadata.DipSwitch
+            {
+                [Models.Metadata.DipSwitch.NameKey] = item.Name,
+                [Models.Metadata.DipSwitch.TagKey] = item.Tag,
+                [Models.Metadata.DipSwitch.MaskKey] = item.Mask,
+            };
+
+            if (item.Condition != null)
+                dipSwitch[Models.Metadata.DipSwitch.ConditionKey] = ConvertToInternalModel(item.Condition);
+
+            if (item.DipLocation != null && item.DipLocation.Any())
+            {
+                dipSwitch[Models.Metadata.DipSwitch.DipLocationKey] = item.DipLocation
+                    .Where(d => d != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            if (item.DipValue != null && item.DipValue.Any())
+            {
+                dipSwitch[Models.Metadata.DipSwitch.DipValueKey] = item.DipValue
+                    .Where(d => d != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            return dipSwitch;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.DipValue"/> to <cref="Models.Metadata.DipValue"/>
+        /// </summary>
+        private static Models.Metadata.DipValue ConvertToInternalModel(DipValue item)
+        {
+            var dipValue = new Models.Metadata.DipValue
+            {
+                [Models.Metadata.DipValue.NameKey] = item.Name,
+                [Models.Metadata.DipValue.ValueKey] = item.Value,
+                [Models.Metadata.DipValue.DefaultKey] = item.Default,
+            };
+
+            if (item.Condition != null)
+                dipValue[Models.Metadata.DipValue.ConditionKey] = ConvertToInternalModel(item.Condition);
+
+            return dipValue;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Disk"/> to <cref="Models.Metadata.Disk"/>
+        /// </summary>
+        private static Models.Metadata.Disk ConvertToInternalModel(Disk item)
+        {
+            var disk = new Models.Metadata.Disk
+            {
+                [Models.Metadata.Disk.NameKey] = item.Name,
+                [Models.Metadata.Disk.MD5Key] = item.MD5,
+                [Models.Metadata.Disk.SHA1Key] = item.SHA1,
+                [Models.Metadata.Disk.MergeKey] = item.Merge,
+                [Models.Metadata.Disk.RegionKey] = item.Region,
+                [Models.Metadata.Disk.IndexKey] = item.Index,
+                [Models.Metadata.Disk.WritableKey] = item.Writable,
+                [Models.Metadata.Disk.StatusKey] = item.Status,
+                [Models.Metadata.Disk.OptionalKey] = item.Optional,
+            };
+            return disk;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Display"/> to <cref="Models.Metadata.Display"/>
+        /// </summary>
+        private static Models.Metadata.Display ConvertToInternalModel(Display item)
+        {
+            var display = new Models.Metadata.Display
+            {
+                [Models.Metadata.Display.TagKey] = item.Tag,
+                [Models.Metadata.Display.TypeKey] = item.Type,
+                [Models.Metadata.Display.RotateKey] = item.Rotate,
+                [Models.Metadata.Display.FlipXKey] = item.FlipX,
+                [Models.Metadata.Display.WidthKey] = item.Width,
+                [Models.Metadata.Display.HeightKey] = item.Height,
+                [Models.Metadata.Display.RefreshKey] = item.Refresh,
+                [Models.Metadata.Display.PixClockKey] = item.PixClock,
+                [Models.Metadata.Display.HTotalKey] = item.HTotal,
+                [Models.Metadata.Display.HBEndKey] = item.HBEnd,
+                [Models.Metadata.Display.HBStartKey] = item.HBStart,
+                [Models.Metadata.Display.VTotalKey] = item.VTotal,
+                [Models.Metadata.Display.VBEndKey] = item.VBEnd,
+                [Models.Metadata.Display.VBStartKey] = item.VBStart,
+            };
+            return display;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Driver"/> to <cref="Models.Metadata.Driver"/>
+        /// </summary>
+        private static Models.Metadata.Driver ConvertToInternalModel(Driver item)
+        {
+            var driver = new Models.Metadata.Driver
+            {
+                [Models.Metadata.Driver.StatusKey] = item.Status,
+                [Models.Metadata.Driver.ColorKey] = item.Color,
+                [Models.Metadata.Driver.SoundKey] = item.Sound,
+                [Models.Metadata.Driver.PaletteSizeKey] = item.PaletteSize,
+                [Models.Metadata.Driver.EmulationKey] = item.Emulation,
+                [Models.Metadata.Driver.CocktailKey] = item.Cocktail,
+                [Models.Metadata.Driver.SaveStateKey] = item.SaveState,
+                [Models.Metadata.Driver.RequiresArtworkKey] = item.RequiresArtwork,
+                [Models.Metadata.Driver.UnofficialKey] = item.Unofficial,
+                [Models.Metadata.Driver.NoSoundHardwareKey] = item.NoSoundHardware,
+                [Models.Metadata.Driver.IncompleteKey] = item.Incomplete,
+            };
+            return driver;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Extension"/> to <cref="Models.Metadata.Extension"/>
+        /// </summary>
+        private static Models.Metadata.Extension ConvertToInternalModel(Extension item)
+        {
+            var extension = new Models.Metadata.Extension
+            {
+                [Models.Metadata.Extension.NameKey] = item.Name,
+            };
+            return extension;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Feature"/> to <cref="Models.Metadata.Feature"/>
+        /// </summary>
+        private static Models.Metadata.Feature ConvertToInternalModel(Feature item)
+        {
+            var feature = new Models.Metadata.Feature
+            {
+                [Models.Metadata.Feature.TypeKey] = item.Type,
+                [Models.Metadata.Feature.StatusKey] = item.Status,
+                [Models.Metadata.Feature.OverallKey] = item.Overall,
+            };
+            return feature;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Input"/> to <cref="Models.Metadata.Input"/>
+        /// </summary>
+        private static Models.Metadata.Input ConvertToInternalModel(Input item)
+        {
+            var input = new Models.Metadata.Input
+            {
+                [Models.Metadata.Input.ServiceKey] = item.Service,
+                [Models.Metadata.Input.TiltKey] = item.Tilt,
+                [Models.Metadata.Input.PlayersKey] = item.Players,
+                [Models.Metadata.Input.ControlKey] = item.ControlAttr,
+                [Models.Metadata.Input.ButtonsKey] = item.Buttons,
+                [Models.Metadata.Input.CoinsKey] = item.Coins,
+            };
+
+            if (item.Control != null && item.Control.Any())
+            {
+                input[Models.Metadata.Input.ControlKey] = item.Control
+                    .Where(c => c != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            return input;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Instance"/> to <cref="Models.Metadata.Instance"/>
+        /// </summary>
+        private static Models.Metadata.Instance ConvertToInternalModel(Instance item)
+        {
+            var instance = new Models.Metadata.Instance
+            {
+                [Models.Metadata.Instance.NameKey] = item.Name,
+                [Models.Metadata.Instance.BriefNameKey] = item.BriefName,
+            };
+            return instance;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Port"/> to <cref="Models.Metadata.Port"/>
+        /// </summary>
+        private static Models.Metadata.Port ConvertToInternalModel(Port item)
+        {
+            var port = new Models.Metadata.Port
+            {
+                [Models.Metadata.Port.TagKey] = item.Tag,
+            };
+
+            if (item.Analog != null && item.Analog.Any())
+            {
+                port[Models.Metadata.Port.AnalogKey] = item.Analog
+                    .Where(a => a != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            return port;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.RamOption"/> to <cref="Models.Metadata.RamOption"/>
+        /// </summary>
+        private static Models.Metadata.RamOption ConvertToInternalModel(RamOption item)
+        {
+            var ramOption = new Models.Metadata.RamOption
+            {
+                [Models.Metadata.RamOption.NameKey] = item.Name,
+                [Models.Metadata.RamOption.DefaultKey] = item.Default,
+                [Models.Metadata.RamOption.ContentKey] = item.Content,
+            };
+            return ramOption;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Rom"/> to <cref="Models.Metadata.Rom"/>
+        /// </summary>
+        private static Models.Metadata.Rom ConvertToInternalModel(Rom item)
+        {
+            var rom = new Models.Metadata.Rom
+            {
+                [Models.Metadata.Rom.NameKey] = item.Name,
+                [Models.Metadata.Rom.BiosKey] = item.Bios,
+                [Models.Metadata.Rom.SizeKey] = item.Size,
+                [Models.Metadata.Rom.CRCKey] = item.CRC,
+                [Models.Metadata.Rom.SHA1Key] = item.SHA1,
+                [Models.Metadata.Rom.MergeKey] = item.Merge,
+                [Models.Metadata.Rom.RegionKey] = item.Region,
+                [Models.Metadata.Rom.OffsetKey] = item.Offset,
+                [Models.Metadata.Rom.StatusKey] = item.Status,
+                [Models.Metadata.Rom.OptionalKey] = item.Optional,
+                [Models.Metadata.Rom.DisposeKey] = item.Dispose,
+                [Models.Metadata.Rom.SoundOnlyKey] = item.SoundOnly,
+            };
+            return rom;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Sample"/> to <cref="Models.Metadata.Sample"/>
+        /// </summary>
+        private static Models.Metadata.Sample ConvertToInternalModel(Sample item)
+        {
+            var sample = new Models.Metadata.Sample
+            {
+                [Models.Metadata.Sample.NameKey] = item.Name,
+            };
+            return sample;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Slot"/> to <cref="Models.Metadata.Slot"/>
+        /// </summary>
+        private static Models.Metadata.Slot ConvertToInternalModel(Slot item)
+        {
+            var slot = new Models.Metadata.Slot
+            {
+                [Models.Metadata.Slot.NameKey] = item.Name,
+            };
+
+            if (item.SlotOption != null && item.SlotOption.Any())
+            {
+                slot[Models.Metadata.Slot.SlotOptionKey] = item.SlotOption
+                    .Where(s => s != null)
+                    .Select(ConvertToInternalModel)
+                    .ToArray();
+            }
+
+            return slot;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.SlotOption"/> to <cref="Models.Metadata.SlotOption"/>
+        /// </summary>
+        private static Models.Metadata.SlotOption ConvertToInternalModel(SlotOption item)
+        {
+            var slotOption = new Models.Metadata.SlotOption
+            {
+                [Models.Metadata.SlotOption.NameKey] = item.Name,
+                [Models.Metadata.SlotOption.DevNameKey] = item.DevName,
+                [Models.Metadata.SlotOption.DefaultKey] = item.Default,
+            };
+            return slotOption;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.SoftwareList"/> to <cref="Models.Metadata.SoftwareList"/>
+        /// </summary>
+        private static Models.Metadata.SoftwareList ConvertToInternalModel(SoftwareList item)
+        {
+            var softwareList = new Models.Metadata.SoftwareList
+            {
+                [Models.Metadata.SoftwareList.TagKey] = item.Tag,
+                [Models.Metadata.SoftwareList.NameKey] = item.Name,
+                [Models.Metadata.SoftwareList.StatusKey] = item.Status,
+                [Models.Metadata.SoftwareList.FilterKey] = item.Filter,
+            };
+            return softwareList;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Sound"/> to <cref="Models.Metadata.Sound"/>
+        /// </summary>
+        private static Models.Metadata.Sound ConvertToInternalModel(Sound item)
+        {
+            var sound = new Models.Metadata.Sound
+            {
+                [Models.Metadata.Sound.ChannelsKey] = item.Channels,
+            };
+            return sound;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.Video"/> to <cref="Models.Metadata.Video"/>
+        /// </summary>
+        private static Models.Metadata.Video ConvertToInternalModel(Video item)
+        {
+            var video = new Models.Metadata.Video
+            {
+                [Models.Metadata.Video.ScreenKey] = item.Screen,
+                [Models.Metadata.Video.OrientationKey] = item.Orientation,
+                [Models.Metadata.Video.WidthKey] = item.Width,
+                [Models.Metadata.Video.HeightKey] = item.Height,
+                [Models.Metadata.Video.AspectXKey] = item.AspectX,
+                [Models.Metadata.Video.AspectYKey] = item.AspectY,
+                [Models.Metadata.Video.RefreshKey] = item.Refresh,
+            };
+            return video;
+        }
+    }
+}
\ No newline at end of file
diff --git a/CrossModel/M1.Deserializer.cs b/CrossModel/M1.Deserializer.cs
new file mode 100644
index 00000000..2e55d82f
--- /dev/null
+++ b/CrossModel/M1.Deserializer.cs
@@ -0,0 +1,44 @@
+using System.Linq;
+
+namespace SabreTools.Serialization.CrossModel
+{
+    public partial class M1 : IModelSerializer<Models.Listxml.M1, Models.Metadata.MetadataFile>
+    {
+        /// <inheritdoc/>
+#if NET48
+        public Models.Listxml.M1 Deserialize(Models.Metadata.MetadataFile obj)
+#else
+        public Models.Listxml.M1? Deserialize(Models.Metadata.MetadataFile? obj)
+#endif
+        {
+            if (obj == null)
+                return null;
+
+            var header = obj.Read<Models.Metadata.Header>(Models.Metadata.MetadataFile.HeaderKey);
+            var m1 = header != null ? ConvertM1FromInternalModel(header) : new Models.Listxml.M1();
+
+            var machines = obj.Read<Models.Metadata.Machine[]>(Models.Metadata.MetadataFile.MachineKey);
+            if (machines != null && machines.Any())
+            {
+                m1.Game = machines
+                    .Where(m => m != null)
+                    .Select(Listxml.ConvertMachineFromInternalModel)
+                    .ToArray();
+            }
+
+            return m1;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Metadata.Models.Metadata.Header"/> to <cref="Models.Listxml.M1"/>
+        /// </summary>
+        private static Models.Listxml.M1 ConvertM1FromInternalModel(Models.Metadata.Header item)
+        {
+            var m1 = new Models.Listxml.M1
+            {
+                Version = item.ReadString(Models.Metadata.Header.VersionKey),
+            };
+            return m1;
+        }
+    }
+}
\ No newline at end of file
diff --git a/CrossModel/M1.Serializer.cs b/CrossModel/M1.Serializer.cs
new file mode 100644
index 00000000..b568fe61
--- /dev/null
+++ b/CrossModel/M1.Serializer.cs
@@ -0,0 +1,45 @@
+using System.Linq;
+
+namespace SabreTools.Serialization.CrossModel
+{
+    public partial class M1 : IModelSerializer<Models.Listxml.M1, Models.Metadata.MetadataFile>
+    {
+        /// <inheritdoc/>
+#if NET48
+        public Models.Metadata.MetadataFile Serialize(Models.Listxml.M1 item)
+#else
+        public Models.Metadata.MetadataFile? Serialize(Models.Listxml.M1? item)
+#endif
+        {
+            if (item == null)
+                return null;
+
+            var metadataFile = new Models.Metadata.MetadataFile
+            {
+                [Models.Metadata.MetadataFile.HeaderKey] = ConvertHeaderToInternalModel(item),
+            };
+
+            if (item?.Game != null && item.Game.Any())
+            {
+                metadataFile[Models.Metadata.MetadataFile.MachineKey] = item.Game
+                    .Where(g => g != null)
+                    .Select(Listxml.ConvertMachineToInternalModel)
+                    .ToArray();
+            }
+
+            return metadataFile;
+        }
+
+        /// <summary>
+        /// Convert from <cref="Models.Listxml.M1"/> to <cref="Models.Metadata.Header"/>
+        /// </summary>
+        private static Models.Metadata.Header ConvertHeaderToInternalModel(Models.Listxml.M1 item)
+        {
+            var header = new Models.Metadata.Header
+            {
+                [Models.Metadata.Header.VersionKey] = item.Version,
+            };
+            return header;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Files/Listxml.Deserializer.cs b/Files/Listxml.Deserializer.cs
new file mode 100644
index 00000000..df9ae2cd
--- /dev/null
+++ b/Files/Listxml.Deserializer.cs
@@ -0,0 +1,7 @@
+namespace SabreTools.Serialization.Files
+{
+    public partial class Listxml : XmlFile<Models.Listxml.Mame>
+    {
+        // All serialization logic is in the base class
+    }
+}
\ No newline at end of file
diff --git a/Files/Listxml.Serializer.cs b/Files/Listxml.Serializer.cs
new file mode 100644
index 00000000..df9ae2cd
--- /dev/null
+++ b/Files/Listxml.Serializer.cs
@@ -0,0 +1,7 @@
+namespace SabreTools.Serialization.Files
+{
+    public partial class Listxml : XmlFile<Models.Listxml.Mame>
+    {
+        // All serialization logic is in the base class
+    }
+}
\ No newline at end of file
diff --git a/Files/M1.Deserializer.cs b/Files/M1.Deserializer.cs
new file mode 100644
index 00000000..1296da8f
--- /dev/null
+++ b/Files/M1.Deserializer.cs
@@ -0,0 +1,7 @@
+namespace SabreTools.Serialization.Files
+{
+    public partial class M1 : XmlFile<Models.Listxml.M1>
+    {
+        // All serialization logic is in the base class
+    }
+}
\ No newline at end of file
diff --git a/Files/M1.Serializer.cs b/Files/M1.Serializer.cs
new file mode 100644
index 00000000..1296da8f
--- /dev/null
+++ b/Files/M1.Serializer.cs
@@ -0,0 +1,7 @@
+namespace SabreTools.Serialization.Files
+{
+    public partial class M1 : XmlFile<Models.Listxml.M1>
+    {
+        // All serialization logic is in the base class
+    }
+}
\ No newline at end of file
diff --git a/Streams/Listxml.Deserializer.cs b/Streams/Listxml.Deserializer.cs
new file mode 100644
index 00000000..720276af
--- /dev/null
+++ b/Streams/Listxml.Deserializer.cs
@@ -0,0 +1,7 @@
+namespace SabreTools.Serialization.Streams
+{
+    public partial class Listxml : XmlFile<Models.Listxml.Mame>
+    {
+        // All serialization logic is in the base class
+    }
+}
\ No newline at end of file
diff --git a/Streams/Listxml.Serializer.cs b/Streams/Listxml.Serializer.cs
new file mode 100644
index 00000000..720276af
--- /dev/null
+++ b/Streams/Listxml.Serializer.cs
@@ -0,0 +1,7 @@
+namespace SabreTools.Serialization.Streams
+{
+    public partial class Listxml : XmlFile<Models.Listxml.Mame>
+    {
+        // All serialization logic is in the base class
+    }
+}
\ No newline at end of file
diff --git a/Streams/M1.Deserializer.cs b/Streams/M1.Deserializer.cs
new file mode 100644
index 00000000..75f0f35e
--- /dev/null
+++ b/Streams/M1.Deserializer.cs
@@ -0,0 +1,7 @@
+namespace SabreTools.Serialization.Streams
+{
+    public partial class M1 : XmlFile<Models.Listxml.M1>
+    {
+        // All serialization logic is in the base class
+    }
+}
\ No newline at end of file
diff --git a/Streams/M1.Serializer.cs b/Streams/M1.Serializer.cs
new file mode 100644
index 00000000..75f0f35e
--- /dev/null
+++ b/Streams/M1.Serializer.cs
@@ -0,0 +1,7 @@
+namespace SabreTools.Serialization.Streams
+{
+    public partial class M1 : XmlFile<Models.Listxml.M1>
+    {
+        // All serialization logic is in the base class
+    }
+}
\ No newline at end of file