diff --git a/SabreTools.DatFiles/Formats/ClrMamePro.Writer.cs b/SabreTools.DatFiles/Formats/ClrMamePro.Writer.cs
index 694323c1..ec9e388e 100644
--- a/SabreTools.DatFiles/Formats/ClrMamePro.Writer.cs
+++ b/SabreTools.DatFiles/Formats/ClrMamePro.Writer.cs
@@ -130,7 +130,6 @@ namespace SabreTools.DatFiles.Formats
                     break;
             }
 
-            // TODO: Check required fields
             return missingFields;
         }
 
diff --git a/SabreTools.Serialization/Logiqx.cs b/SabreTools.Serialization/Logiqx.cs
index 556b0c09..84923351 100644
--- a/SabreTools.Serialization/Logiqx.cs
+++ b/SabreTools.Serialization/Logiqx.cs
@@ -1,7 +1,38 @@
+using System.IO;
+
 namespace SabreTools.Serialization
 {
     /// <summary>
     /// XML deserializer for Logiqx-derived metadata files
     /// </summary>
-    public class Logiqx : XmlSerializer<Models.Logiqx.Datafile> { }
+    public class Logiqx : XmlSerializer<Models.Logiqx.Datafile>
+    {
+        /// <summary>
+        /// name field for DOCTYPE
+        /// </summary>
+        public const string? DocTypeName = "datafile";
+
+        /// <summary>
+        /// pubid field for DOCTYPE
+        /// </summary>
+        public const string? DocTypePubId = "-//Logiqx//DTD ROM Management Datafile//EN";
+
+        /// <summary>
+        /// sysid field for DOCTYPE
+        /// </summary>
+        public const string? DocTypeSysId = "http://www.logiqx.com/Dats/datafile.dtd";
+
+        /// <summary>
+        /// subset field for DOCTYPE
+        /// </summary>
+        public const string? DocTypeSubset = null;
+
+        /// <inheritdoc cref="SerializeToFile(Models.Logiqx.Datafile, string, string?, string?, string?, string?)" />
+        public static bool SerializeToFileWithDocType(Models.Logiqx.Datafile obj, string path)
+            => SerializeToFile(obj, path, DocTypeName, DocTypePubId, DocTypeSysId, DocTypeSysId);
+
+        /// <inheritdoc cref="SerializeToStream(Models.Logiqx.Datafile, string?, string?, string?, string?)" />
+        public static Stream? SerializeToStreamWithDocType(Models.Logiqx.Datafile obj, string path)
+            => SerializeToStream(obj, DocTypeName, DocTypePubId, DocTypeSysId, DocTypeSysId);
+    }
 }
\ No newline at end of file
diff --git a/SabreTools.Serialization/OpenMSX.cs b/SabreTools.Serialization/OpenMSX.cs
index 2f88c0eb..17d94692 100644
--- a/SabreTools.Serialization/OpenMSX.cs
+++ b/SabreTools.Serialization/OpenMSX.cs
@@ -1,7 +1,38 @@
+using System.IO;
+
 namespace SabreTools.Serialization
 {
     /// <summary>
     /// XML deserializer for OpenMSX software database files
     /// </summary>
-    public class OpenMSX : XmlSerializer<Models.OpenMSX.SoftwareDb> { }
+    public class OpenMSX : XmlSerializer<Models.OpenMSX.SoftwareDb>
+    {
+        /// <summary>
+        /// name field for DOCTYPE
+        /// </summary>
+        public const string? DocTypeName = "softwaredb";
+
+        /// <summary>
+        /// pubid field for DOCTYPE
+        /// </summary>
+        public const string? DocTypePubId = null;
+
+        /// <summary>
+        /// sysid field for DOCTYPE
+        /// </summary>
+        public const string? DocTypeSysId = "softwaredb1.dtd";
+
+        /// <summary>
+        /// subset field for DOCTYPE
+        /// </summary>
+        public const string? DocTypeSubset = null;
+
+        /// <inheritdoc cref="SerializeToFile(Models.OpenMSX.SoftwareDb, string, string?, string?, string?, string?)" />
+        public static bool SerializeToFileWithDocType(Models.OpenMSX.SoftwareDb obj, string path)
+            => SerializeToFile(obj, path, DocTypeName, DocTypePubId, DocTypeSysId, DocTypeSysId);
+
+        /// <inheritdoc cref="SerializeToStream(Models.OpenMSX.SoftwareDb, string?, string?, string?, string?)" />
+        public static Stream? SerializeToStreamWithDocType(Models.OpenMSX.SoftwareDb obj, string path)
+            => SerializeToStream(obj, DocTypeName, DocTypePubId, DocTypeSysId, DocTypeSysId);
+    }
 }
\ No newline at end of file
diff --git a/SabreTools.Serialization/SoftwareList.cs b/SabreTools.Serialization/SoftwareList.cs
index 00e062f6..68f9f451 100644
--- a/SabreTools.Serialization/SoftwareList.cs
+++ b/SabreTools.Serialization/SoftwareList.cs
@@ -1,7 +1,38 @@
+using System.IO;
+
 namespace SabreTools.Serialization
 {
     /// <summary>
     /// XML deserializer for MAME softwarelist files
     /// </summary>
-    public class SoftawreList : XmlSerializer<Models.SoftwareList.SoftwareList> { }
+    public class SoftawreList : XmlSerializer<Models.SoftwareList.SoftwareList>
+    {
+        /// <summary>
+        /// name field for DOCTYPE
+        /// </summary>
+        public const string? DocTypeName = "softwarelist";
+
+        /// <summary>
+        /// pubid field for DOCTYPE
+        /// </summary>
+        public const string? DocTypePubId = null;
+
+        /// <summary>
+        /// sysid field for DOCTYPE
+        /// </summary>
+        public const string? DocTypeSysId = "softwarelist.dtd";
+
+        /// <summary>
+        /// subset field for DOCTYPE
+        /// </summary>
+        public const string? DocTypeSubset = null;
+
+        /// <inheritdoc cref="SerializeToFile(Models.SoftwareList.SoftwareList, string, string?, string?, string?, string?)" />
+        public static bool SerializeToFileWithDocType(Models.SoftwareList.SoftwareList obj, string path)
+            => SerializeToFile(obj, path, DocTypeName, DocTypePubId, DocTypeSysId, DocTypeSysId);
+
+        /// <inheritdoc cref="SerializeToStream(Models.SoftwareList.SoftwareList, string?, string?, string?, string?)" />
+        public static Stream? SerializeToStreamWithDocType(Models.SoftwareList.SoftwareList obj, string path)
+            => SerializeToStream(obj, DocTypeName, DocTypePubId, DocTypeSysId, DocTypeSysId);
+    }
 }
\ No newline at end of file
diff --git a/SabreTools.Serialization/XmlSerializer.Serializer.cs b/SabreTools.Serialization/XmlSerializer.Serializer.cs
index 9e60a817..8aff4502 100644
--- a/SabreTools.Serialization/XmlSerializer.Serializer.cs
+++ b/SabreTools.Serialization/XmlSerializer.Serializer.cs
@@ -10,6 +10,16 @@ namespace SabreTools.Serialization
     /// </summary>
     public abstract partial class XmlSerializer<T>
     {
+        /// <summary>
+        /// Serializes the defined type to an XML file
+        /// </summary>
+        /// <param name="obj">Data to serialize</param>
+        /// <param name="path">Path to the file to serialize to</param>
+        /// <param name="obj">Data to serialize</param>
+        /// <returns>True on successful serialization, false otherwise</returns>
+        public static bool SerializeToFile(T? obj, string path)
+            => SerializeToFile(obj, path, null, null, null, null);
+
         /// <summary>
         /// Serializes the defined type to an XML file
         /// </summary>
@@ -21,9 +31,9 @@ namespace SabreTools.Serialization
         /// <param name="sysid">Optional DOCTYPE sysid</param>
         /// <param name="subset">Optional DOCTYPE name</param>
         /// <returns>True on successful serialization, false otherwise</returns>
-        public static bool SerializeToFile(T? obj, string path, string? name = null, string? pubid = null, string? sysid = null, string? subset = null)
+        protected static bool SerializeToFile(T? obj, string path, string? name = null, string? pubid = null, string? sysid = null, string? subset = null)
         {
-            using var stream = SerializeToStream(obj);
+            using var stream = SerializeToStream(obj, name, pubid, sysid, subset);
             if (stream == null)
                 return false;
 
@@ -32,6 +42,14 @@ namespace SabreTools.Serialization
             return true;
         }
 
+        /// <summary>
+        /// Serializes the defined type to a stream
+        /// </summary>
+        /// <param name="obj">Data to serialize</param>
+        /// <returns>Stream containing serialized data on success, null otherwise</returns>
+        public static Stream? SerializeToStream(T? obj)
+            => SerializeToStream(obj, null, null, null, null);
+    
         /// <summary>
         /// Serializes the defined type to a stream
         /// </summary>
@@ -41,7 +59,7 @@ namespace SabreTools.Serialization
         /// <param name="sysid">Optional DOCTYPE sysid</param>
         /// <param name="subset">Optional DOCTYPE name</param>
         /// <returns>Stream containing serialized data on success, null otherwise</returns>
-        public static Stream? SerializeToStream(T? obj, string? name = null, string? pubid = null, string? sysid = null, string? subset = null)
+        protected static Stream? SerializeToStream(T? obj, string? name = null, string? pubid = null, string? sysid = null, string? subset = null)
         {
             // If the object is null
             if (obj == null)
@@ -70,5 +88,6 @@ namespace SabreTools.Serialization
             stream.Seek(0, SeekOrigin.Begin);
             return stream;
         }
+    
     }
 }
\ No newline at end of file