diff --git a/Hcs.WebApp/Components/Pages/Registry/Common.razor b/Hcs.WebApp/Components/Pages/Registry/Common.razor
new file mode 100644
index 0000000..bb8d481
--- /dev/null
+++ b/Hcs.WebApp/Components/Pages/Registry/Common.razor
@@ -0,0 +1,5 @@
+<h3>Common</h3>
+
+@code {
+
+}
diff --git a/Hcs.WebApp/Data/Hcs/HcsDbContext.cs b/Hcs.WebApp/Data/Hcs/HcsDbContext.cs
index 148b90a..14b0ceb 100644
--- a/Hcs.WebApp/Data/Hcs/HcsDbContext.cs
+++ b/Hcs.WebApp/Data/Hcs/HcsDbContext.cs
@@ -1,5 +1,4 @@
-using Microsoft.AspNetCore.Identity;
-using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
 
 namespace Hcs.WebApp.Data.Hcs
 {
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.Designer.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.Designer.cs
new file mode 100644
index 0000000..bb7245c
--- /dev/null
+++ b/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.Designer.cs
@@ -0,0 +1,85 @@
+// <auto-generated />
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+namespace Hcs.WebApp.Data.Hcs.Migrations
+{
+    [DbContext(typeof(HcsDbContext))]
+    [Migration("20251022075934_SpecifyCommonRegistry")]
+    partial class SpecifyCommonRegistry
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.9")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
+            {
+                b.Property<string>("Id")
+                    .HasColumnType("nvarchar(450)");
+
+                b.Property<bool>("IsCommon")
+                    .HasColumnType("bit");
+
+                b.Property<int>("Number")
+                    .HasColumnType("int");
+
+                b.HasKey("Id");
+
+                b.ToTable("Registries");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
+            {
+                b.Property<string>("Id")
+                    .HasColumnType("nvarchar(450)");
+
+                b.Property<string>("Code")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<string>("GUID")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<string>("RegistryId")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(450)");
+
+                b.Property<string>("Xml")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(max)");
+
+                b.HasKey("Id");
+
+                b.HasIndex("RegistryId");
+
+                b.ToTable("Elements");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
+            {
+                b.HasOne("Hcs.WebApp.Data.Hcs.Registry", "Registry")
+                    .WithMany("Elements")
+                    .HasForeignKey("RegistryId")
+                    .OnDelete(DeleteBehavior.Cascade)
+                    .IsRequired();
+
+                b.Navigation("Registry");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
+            {
+                b.Navigation("Elements");
+            });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.cs
new file mode 100644
index 0000000..547f37b
--- /dev/null
+++ b/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.cs
@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+namespace Hcs.WebApp.Data.Hcs.Migrations
+{
+    /// <inheritdoc />
+    public partial class SpecifyCommonRegistry : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "IsCommon",
+                table: "Registries",
+                type: "bit",
+                nullable: false,
+                defaultValue: false);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "IsCommon",
+                table: "Registries");
+        }
+    }
+}
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs b/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs
index 9ee9958..e8d58a1 100644
--- a/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs
+++ b/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs
@@ -1,12 +1,16 @@
 // <auto-generated />
+using Hcs.WebApp.Data.Hcs;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 
 #nullable disable
+
 namespace Hcs.WebApp.Data.Hcs.Migrations
 {
     [DbContext(typeof(HcsDbContext))]
-    partial class HcsDbContextModelSnapshot : ModelSnapshot
+    public partial class HcsDbContextModelSnapshot : ModelSnapshot
     {
         protected override void BuildModel(ModelBuilder modelBuilder)
         {
@@ -18,61 +22,64 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
             SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
-            {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("nvarchar(450)");
 
-                b.Property<int>("Number")
-                    .HasColumnType("int");
+                    b.Property<bool>("IsCommon")
+                        .HasColumnType("bit");
 
-                b.HasKey("Id");
+                    b.Property<int>("Number")
+                        .HasColumnType("int");
 
-                b.ToTable("Registries");
-            });
+                    b.HasKey("Id");
+
+                    b.ToTable("Registries");
+                });
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
-            {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("nvarchar(450)");
 
-                b.Property<string>("Code")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(max)");
+                    b.Property<string>("Code")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
 
-                b.Property<string>("GUID")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(max)");
+                    b.Property<string>("GUID")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
 
-                b.Property<string>("RegistryId")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(450)");
+                    b.Property<string>("RegistryId")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(450)");
 
-                b.Property<string>("Xml")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(max)");
+                    b.Property<string>("Xml")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
 
-                b.HasKey("Id");
+                    b.HasKey("Id");
 
-                b.HasIndex("RegistryId");
+                    b.HasIndex("RegistryId");
 
-                b.ToTable("Elements");
-            });
+                    b.ToTable("Elements");
+                });
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
-            {
-                b.HasOne("Hcs.WebApp.Data.Hcs.Registry", "Registry")
-                    .WithMany("Elements")
-                    .HasForeignKey("RegistryId")
-                    .OnDelete(DeleteBehavior.Cascade)
-                    .IsRequired();
+                {
+                    b.HasOne("Hcs.WebApp.Data.Hcs.Registry", "Registry")
+                        .WithMany("Elements")
+                        .HasForeignKey("RegistryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
 
-                b.Navigation("Registry");
-            });
+                    b.Navigation("Registry");
+                });
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
-            {
-                b.Navigation("Elements");
-            });
+                {
+                    b.Navigation("Elements");
+                });
 #pragma warning restore 612, 618
         }
     }
diff --git a/Hcs.WebApp/Data/Hcs/Registry.cs b/Hcs.WebApp/Data/Hcs/Registry.cs
index 330931c..c17492e 100644
--- a/Hcs.WebApp/Data/Hcs/Registry.cs
+++ b/Hcs.WebApp/Data/Hcs/Registry.cs
@@ -6,6 +6,8 @@
 
         public int Number { get; set; }
 
+        public bool IsCommon { get; set; }
+
         public virtual ICollection<RegistryElement> Elements { get; set; } = [];
     }
 }