diff --git a/src/dajet-metadata-tests/ConfigDiff.cs b/src/dajet-metadata-tests/ConfigDiff.cs
new file mode 100644
index 0000000..7d1edba
--- /dev/null
+++ b/src/dajet-metadata-tests/ConfigDiff.cs
@@ -0,0 +1,59 @@
+using DaJet.Metadata.Model;
+using DaJet.Metadata.Services;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.IO;
+using System.Text;
+
+namespace DaJet.Metadata.ConfigDiff
+{
+    [TestClass] public sealed class ConfigDiff
+    {
+        [TestMethod] public void TestDiff()
+        {
+            IMetadataService metadata = new MetadataService();
+            IMetaDiffService metadiff = new MetaDiffService();
+
+            metadata
+                .UseDatabaseProvider(DatabaseProvider.SQLServer)
+                .UseConnectionString("Data Source=ZHICHKIN;Initial Catalog=cerberus;Integrated Security=True");
+            InfoBase ibOld = metadata.LoadInfoBase();
+
+            metadata
+                .UseDatabaseProvider(DatabaseProvider.SQLServer)
+                .UseConnectionString("Data Source=ZHICHKIN;Initial Catalog=cerberus_new;Integrated Security=True");
+            InfoBase ibNew = metadata.LoadInfoBase();
+
+            MetaDiff diff = metadiff.Compare(ibOld, ibNew);
+
+            WriteDiffToFile(diff);
+        }
+
+        private void WriteDiffToFile(MetaDiff diff)
+        {
+            using (StreamWriter stream = new StreamWriter(@"C:\temp\diff.txt", false, Encoding.UTF8))
+            {
+                WriteToFile(stream, diff, 0, string.Empty);
+            }
+        }
+        private void WriteToFile(StreamWriter stream, MetaDiff diff, int level, string path)
+        {
+            string indent = level == 0 ? string.Empty : "-".PadLeft(level * 4, '-');
+            //string thisPath = path + (string.IsNullOrEmpty(path) ? string.Empty : ".") + i.ToString();
+            stream.WriteLine(indent + "[" + level.ToString() + "] (" + diff.Difference.ToString() + ") "
+                + diff.Target.ToString()
+                + (diff.Target is MetadataProperty property ? " (" + property.PropertyType.ToString() + ")" : string.Empty));
+
+            foreach (var entry in diff.NewValues)
+            {
+                indent = "-".PadLeft((level + 1) * 4, '-');
+                stream.WriteLine(indent + "[*] " + entry.Key + " = " + entry.Value.ToString());
+            }
+
+            for (int i = 0; i < diff.Children.Count; i++)
+            {
+                //thisPath = path + (string.IsNullOrEmpty(path) ? string.Empty : ".") + i.ToString();
+                WriteToFile(stream, diff.Children[i], level + 1, path);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/dajet-metadata/enrichers/InfoBaseEnricher.cs b/src/dajet-metadata/enrichers/InfoBaseEnricher.cs
index 699770c..bbe6870 100644
--- a/src/dajet-metadata/enrichers/InfoBaseEnricher.cs
+++ b/src/dajet-metadata/enrichers/InfoBaseEnricher.cs
@@ -28,6 +28,11 @@ public void Enrich(MetadataObject metadataObject)
 
             ConfigureConfigInfo(infoBase, config);
             ConfigureCommonObjects(infoBase, config);
+
+            if (string.IsNullOrWhiteSpace(infoBase.Name) && infoBase.ConfigInfo != null)
+            {
+                infoBase.Name = infoBase.ConfigInfo.Name;
+            }
         }
 
         private void ConfigureConfigInfo(InfoBase infoBase, ConfigObject config)
diff --git a/src/dajet-metadata/model/DataTypeInfo.cs b/src/dajet-metadata/model/DataTypeInfo.cs
index 2af8da3..1a58d34 100644
--- a/src/dajet-metadata/model/DataTypeInfo.cs
+++ b/src/dajet-metadata/model/DataTypeInfo.cs
@@ -72,5 +72,18 @@ public bool IsMultipleType
                 return false;
             }
         }
+        public override string ToString()
+        {
+            if (IsMultipleType) return "Multiple";
+            else if (IsUuid) return "Uuid";
+            else if (IsBinary) return "Binary";
+            else if (IsValueStorage) return "ValueStorage";
+            else if (CanBeString) return "String";
+            else if (CanBeBoolean) return "Boolean";
+            else if (CanBeNumeric) return "Numeric";
+            else if (CanBeDateTime) return "DateTime";
+            else if (CanBeReference) return "Reference";
+            else return "Unknown";
+        }
     }
 }
\ No newline at end of file
diff --git a/src/dajet-metadata/model/MetaDiff.cs b/src/dajet-metadata/model/MetaDiff.cs
new file mode 100644
index 0000000..7c57529
--- /dev/null
+++ b/src/dajet-metadata/model/MetaDiff.cs
@@ -0,0 +1,31 @@
+using System.Collections.Generic;
+
+namespace DaJet.Metadata.Model
+{
+    public enum DiffType
+    {
+        ///<summary>No difference (used just as a root of child differences)</summary>
+        None,
+        ///<summary>New item to add</summary>
+        Insert,
+        ///<summary>Some properties has been changed</summary>
+        Update,
+        ///<summary>Target item to be deleted</summary>
+        Delete
+    }
+    public sealed class MetaDiff
+    {
+        public MetaDiff() { }
+        public MetaDiff(MetaDiff parent, MetadataObject target, DiffType difference)
+        {
+            Parent = parent;
+            Target = target;
+            Difference = difference;
+        }
+        public MetaDiff Parent { set; get; }
+        public DiffType Difference { set; get; }
+        public MetadataObject Target { set; get; }
+        public List<MetaDiff> Children { get; } = new List<MetaDiff>();
+        public Dictionary<string, object> NewValues { get; } = new Dictionary<string, object>();
+    }
+}
\ No newline at end of file
diff --git a/src/dajet-metadata/model/MetadataObject.cs b/src/dajet-metadata/model/MetadataObject.cs
index 4ab42ef..b52b3a1 100644
--- a/src/dajet-metadata/model/MetadataObject.cs
+++ b/src/dajet-metadata/model/MetadataObject.cs
@@ -2,15 +2,28 @@
 
 namespace DaJet.Metadata.Model
 {
-    public abstract class MetadataObject
+    public abstract class MetadataObject : IComparable
     {
-        ///<summary>Идентификатор объекта метаданных из файла объекта метаданных</summary>
+        ///<summary>Внутренний идентификатор объекта метаданных</summary>
         public Guid Uuid { get; set; } = Guid.Empty;
         ///<summary>Идентификатор файла объекта метаданных в таблице Config и DBNames</summary>
         public Guid FileName { get; set; } = Guid.Empty;
+        ///<summary>Имя объекта метаданных</summary>
         public string Name { get; set; } = string.Empty;
+        ///<summary>Синоним объекта метаданных</summary>
         public string Alias { get; set; } = string.Empty;
+        
         // TODO: add Comment property ?
-        public override string ToString() { return string.Format("{0}.{1}", GetType().Name, Name); }
+
+        public int CompareTo(object other)
+        {
+            return this.CompareTo((MetadataObject)other);
+        }
+        public int CompareTo(MetadataObject other)
+        {
+            if (other == null) return 1; // this instance is bigger than other
+            return this.Name.CompareTo(other.Name);
+        }
+        public override string ToString() { return string.Format("{0}.{1}", this.GetType().Name, this.Name); }
     }
 }
\ No newline at end of file
diff --git a/src/dajet-metadata/model/MetadataProperty.cs b/src/dajet-metadata/model/MetadataProperty.cs
index 6c8245f..814b960 100644
--- a/src/dajet-metadata/model/MetadataProperty.cs
+++ b/src/dajet-metadata/model/MetadataProperty.cs
@@ -5,17 +5,8 @@
 namespace DaJet.Metadata.Model
 {
     ///<summary>Класс для описания свойств объекта метаданных <see cref="ApplicationObject"> (реквизитов, измерений и ресурсов)</summary>
-    public class MetadataProperty
+    public class MetadataProperty : MetadataObject
     {
-        ///<summary>
-        /// Идентификатор свойства объекта метаданных из файла DBNames таблицы Params.
-        /// Используется для того, чтобы ссылаться на свойство в файле объекта метаданных из таблицы Config.
-        ///</summary>
-        public Guid FileName { get; set; } = Guid.Empty;
-        ///<summary>Имя свойства объекта метаданных</summary>
-        public string Name { get; set; } = string.Empty;
-        ///<summary>Синоним свойства объекта метаданных</summary>
-        public string Alias { get; set; } = string.Empty;
         ///<summary>Основа имени поля в таблице СУБД (может быть дополнено постфиксами в зависимости от типа данных свойства)</summary>
         public string DbName { get; set; } = string.Empty;
         ///<summary>Коллекция для описания полей таблицы СУБД свойства объекта метаданных</summary>
diff --git a/src/dajet-metadata/services/Configurator.cs b/src/dajet-metadata/services/Configurator.cs
index d88c149..8613170 100644
--- a/src/dajet-metadata/services/Configurator.cs
+++ b/src/dajet-metadata/services/Configurator.cs
@@ -223,6 +223,7 @@ public MetadataProperty CreateProperty(Guid uuid, string token, int code)
         {
             return new MetadataProperty()
             {
+                Uuid = uuid,
                 FileName = uuid,
                 DbName = CreateDbName(token, code)
             };
diff --git a/src/dajet-metadata/services/MetaDiffService.cs b/src/dajet-metadata/services/MetaDiffService.cs
new file mode 100644
index 0000000..322b903
--- /dev/null
+++ b/src/dajet-metadata/services/MetaDiffService.cs
@@ -0,0 +1,166 @@
+using DaJet.Metadata.Model;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace DaJet.Metadata.Services
+{
+    public interface IMetaDiffService
+    {
+        MetaDiff Compare(InfoBase target, InfoBase source);
+    }
+    public sealed class MetaDiffService : IMetaDiffService
+    {
+        public MetaDiff Compare(InfoBase target, InfoBase source)
+        {
+            MetaDiff root = new MetaDiff(null, target, DiffType.None);
+            CompareLists(root, target.Catalogs.Values.ToList(), source.Catalogs.Values.ToList());
+            CompareLists(root, target.Documents.Values.ToList(), source.Documents.Values.ToList());
+            CompareLists(root, target.Characteristics.Values.ToList(), source.Characteristics.Values.ToList());
+            CompareLists(root, target.InformationRegisters.Values.ToList(), source.InformationRegisters.Values.ToList());
+            CompareLists(root, target.AccumulationRegisters.Values.ToList(), source.AccumulationRegisters.Values.ToList());
+            return root;
+        }
+        private void CompareLists<T>(MetaDiff parent, List<T> target_list, List<T> source_list) where T : MetadataObject, IComparable
+        {
+            int target_count = target_list.Count;
+            int source_count = source_list.Count;
+            int target_index = 0;
+            int source_index = 0;
+            int compareResult;
+
+            if (target_count == 0 && source_count == 0) return;
+
+            target_list.Sort();
+            source_list.Sort();
+
+            while (target_index < target_count)
+            {
+                if (source_index < source_count)
+                {
+                    compareResult = target_list[target_index].CompareTo(source_list[source_index]);
+                    if (compareResult < 0)
+                    {
+                        MetaDiff difference = new MetaDiff(parent, target_list[target_index], DiffType.Delete);
+                        parent.Children.Add(difference);
+                        SetUpdateDiffType(parent);
+                        AddChildren(difference);
+                        target_index++;
+                    }
+                    else if (compareResult == 0)
+                    {
+                        MetaDiff difference = new MetaDiff(parent, target_list[target_index], DiffType.None);
+                        CompareListItems(difference, target_list[target_index], source_list[source_index]);
+                        if (difference.Difference == DiffType.Update) parent.Children.Add(difference);
+                        target_index++;
+                        source_index++;
+                    }
+                    else
+                    {
+                        MetaDiff difference = new MetaDiff(parent, source_list[source_index], DiffType.Insert);
+                        parent.Children.Add(difference);
+                        SetUpdateDiffType(parent);
+                        AddChildren(difference);
+                        source_index++;
+                    }
+                }
+                else
+                {
+                    MetaDiff difference = new MetaDiff(parent, target_list[target_index], DiffType.Delete);
+                    parent.Children.Add(difference);
+                    SetUpdateDiffType(parent);
+                    AddChildren(difference);
+                    target_index++;
+                }
+            }
+            while (source_index < source_count)
+            {
+                MetaDiff difference = new MetaDiff(parent, source_list[source_index], DiffType.Insert);
+                parent.Children.Add(difference);
+                SetUpdateDiffType(parent);
+                AddChildren(difference);
+                source_index++;
+            }
+        }
+        // Compare methods is used by Update difference
+        private void CompareListItems(MetaDiff difference, MetadataObject target, MetadataObject source)
+        {
+            if (target is ApplicationObject)
+            {
+                CompareObjects(difference, (ApplicationObject)target, (ApplicationObject)source);
+            }
+            else if (typeof(MetadataProperty) == target.GetType())
+            {
+                CompareProperties(difference, (MetadataProperty)target, (MetadataProperty)source);
+            }
+        }
+        private void CompareObjects(MetaDiff difference, ApplicationObject target, ApplicationObject source)
+        {
+            //difference.NewValues.Clear();
+            //if (target.TypeCode != source.TypeCode)
+            //{
+            //    difference.NewValues.Add("TypeCode", source.TypeCode);
+            //}
+            //if (difference.NewValues.Count > 0) SetUpdateDiffType(difference);
+            
+            //if (target.Uuid == source.Uuid || target.FileName == source.FileName)
+            //{
+
+            //}
+
+            CompareLists(difference, target.Properties, source.Properties);
+            CompareLists(difference, target.TableParts, source.TableParts);
+        }
+        private void CompareProperties(MetaDiff difference, MetadataProperty target, MetadataProperty source)
+        {
+            difference.NewValues.Clear();
+            if (target.PropertyType.CanBeBoolean != source.PropertyType.CanBeBoolean
+                || target.PropertyType.CanBeString != source.PropertyType.CanBeString
+                || target.PropertyType.CanBeNumeric != source.PropertyType.CanBeNumeric
+                || target.PropertyType.CanBeDateTime != source.PropertyType.CanBeDateTime
+                || target.PropertyType.CanBeReference != source.PropertyType.CanBeReference
+                || target.PropertyType.IsUuid != source.PropertyType.IsUuid
+                || target.PropertyType.IsValueStorage != source.PropertyType.IsValueStorage
+                || target.PropertyType.IsMultipleType != source.PropertyType.IsMultipleType)
+            {
+                difference.NewValues.Add("PropertyType", source.PropertyType);
+            }
+            if (difference.NewValues.Count > 0) SetUpdateDiffType(difference);
+        }
+        private void SetUpdateDiffType(MetaDiff difference)
+        {
+            if (difference.Difference != DiffType.None) return;
+            difference.Difference = DiffType.Update;
+            MetaDiff parent = difference.Parent;
+            while (parent != null)
+            {
+                parent.Difference = DiffType.Update;
+                parent = parent.Parent;
+            }
+        }
+        // Add children is used by Insert and Delete differences
+        private void AddChildren(MetaDiff difference)
+        {
+            if (difference.Target is ApplicationObject)
+            {
+                AddObjectChildren(difference);
+            }
+        }
+        private void AddObjectChildren(MetaDiff difference)
+        {
+            ApplicationObject target = (ApplicationObject)difference.Target;
+            
+            foreach (MetadataProperty child in target.Properties)
+            {
+                MetaDiff diff = new MetaDiff(difference, child, difference.Difference);
+                difference.Children.Add(diff);
+            }
+            foreach (TablePart child in target.TableParts)
+            {
+                MetaDiff diff = new MetaDiff(difference, child, difference.Difference);
+                difference.Children.Add(diff);
+                AddObjectChildren(diff);
+            }
+        }
+    }
+}
\ No newline at end of file