diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleModifyingRound.kt b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleCreator.kt
similarity index 88%
rename from src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleModifyingRound.kt
rename to src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleCreator.kt
index c4ab6d1..cb777ea 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleModifyingRound.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleCreator.kt
@@ -9,14 +9,14 @@ import ru.landgrafhomyak.serdha.api.v0.dml.SelectCreator
 import ru.landgrafhomyak.serdha.api.v0.dml.Update
 import ru.landgrafhomyak.serdha.api.v0.dml.UpdateCreator
 
-public interface ModuleModifyingRound {
-	public fun interface CreateTable<TableUserExtension : Any> {
+public interface ModuleCreator {
+	public interface CreateTable<TableUserExtension : Any> {
 		public fun createTable(creator: TableCreator<TableUserExtension>): TableUserExtension
 	}
 
 	public fun <TableUserExtension : Any> createTable(namespace: Namespace, name: String, initializer: CreateTable<TableUserExtension>): Table<TableUserExtension, Nothing>
 
-	public fun interface UpdateTable<TableNewUserExtension : Any, TableOldUserExtension : Any> {
+	public interface UpdateTable<TableNewUserExtension : Any, TableOldUserExtension : Any> {
 		public fun updateTable(oldTable: Table<TableOldUserExtension, *>, updater: TableUpdater<TableNewUserExtension, TableOldUserExtension>): TableNewUserExtension
 	}
 
@@ -49,25 +49,25 @@ public interface ModuleModifyingRound {
 		initializer: UpdateTable<TableNewUserExtension, TableOldUserExtension>
 	): Table<TableNewUserExtension, TableOldUserExtension>
 
-	public fun interface CreateSelect<QueryUserWrapper : Any> {
+	public interface CreateSelect<QueryUserWrapper : Any> {
 		public fun createSelect(creator: SelectCreator<QueryUserWrapper>): QueryUserWrapper
 	}
 
 	public fun <QueryUserWrapper : Any> createSelect(initializer: CreateSelect<QueryUserWrapper>): Select<QueryUserWrapper>
 
-	public fun interface CreateInsert<TableUserExtension : Any, QueryUserWrapper : Any> {
+	public interface CreateInsert<TableUserExtension : Any, QueryUserWrapper : Any> {
 		public fun createInsert(table: Table<TableUserExtension, *>, creator: InsertCreator<TableUserExtension, QueryUserWrapper>): QueryUserWrapper
 	}
 
 	public fun <TableUserExtension : Any, QueryUserWrapper : Any> createInsert(table: Table<TableUserExtension, *>, initializer: CreateInsert<TableUserExtension, QueryUserWrapper>): Insert<QueryUserWrapper>
 
-	public fun interface CreateUpdate<TableUserExtension : Any, QueryUserWrapper : Any> {
+	public interface CreateUpdate<TableUserExtension : Any, QueryUserWrapper : Any> {
 		public fun createUpdate(table: Table<TableUserExtension, *>, creator: UpdateCreator<TableUserExtension, QueryUserWrapper>): QueryUserWrapper
 	}
 
 	public fun <TableUserExtension : Any, QueryUserWrapper : Any> createUpdate(table: Table<TableUserExtension, *>, initializer: CreateUpdate<TableUserExtension, QueryUserWrapper>): Update<QueryUserWrapper>
 
-	public fun interface CreateDelete<TableUserExtension : Any, QueryUserWrapper : Any> {
+	public interface CreateDelete<TableUserExtension : Any, QueryUserWrapper : Any> {
 		public fun createDelete(table: Table<TableUserExtension, *>, creator: DeleteCreator<TableUserExtension, QueryUserWrapper>): QueryUserWrapper
 	}
 
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleTemplate.kt b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleTemplate.kt
index 1fa9cd7..23587eb 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleTemplate.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleTemplate.kt
@@ -1,9 +1,17 @@
 package ru.landgrafhomyak.serdha.api.v0.ddl
 
 public interface ModuleTemplate<ModuleUserExtension : Any> {
-	public fun <NewModuleUserExtension : Any> modify(
+	public interface CreateModule<ModuleUserExtension : Any> {
+		public fun createModule(oldModule: ModuleTemplate<ModuleUserExtension>, rootNs: Namespace, updater: ModuleCreator): ModuleUserExtension
+	}
+
+	public interface UpgradeModule<OldModuleUserExtension : Any, NewModuleUserExtension : Any> {
+		public fun createModule(oldModule: ModuleTemplate<OldModuleUserExtension>, rootNs: Namespace, updater: ModuleCreator): NewModuleUserExtension
+	}
+
+	public fun <NewModuleUserExtension : Any> upgrade(
 		newVersionKey: String,
-		updater: (oldModule: ModuleTemplate<ModuleUserExtension>, rootNs: Namespace, updater: ModuleModifyingRound) -> NewModuleUserExtension
+		updater: UpgradeModule<ModuleUserExtension, NewModuleUserExtension>
 	): ModuleTemplate<NewModuleUserExtension>
 
 	public val versionKey: String
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/runtime/UnsynchronizedDatabase.kt b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/runtime/UnsynchronizedDatabase.kt
index 07d26a9..7132522 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/runtime/UnsynchronizedDatabase.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/runtime/UnsynchronizedDatabase.kt
@@ -1,12 +1,12 @@
 package ru.landgrafhomyak.serdha.api.v0.runtime
 
-import ru.landgrafhomyak.serdha.api.v0.ddl.ModuleModifyingRound
+import ru.landgrafhomyak.serdha.api.v0.ddl.ModuleCreator
 import ru.landgrafhomyak.serdha.api.v0.ddl.ModuleTemplate
 import ru.landgrafhomyak.serdha.api.v0.ddl.Namespace
 
 @Suppress("SpellCheckingInspection")
 public interface UnsynchronizedDatabase {
-	public fun <ModuleUserExtension : Any> createModule(initialVersionKey: String, content: (rootNs: Namespace, updater: ModuleModifyingRound) -> ModuleUserExtension): ModuleTemplate<ModuleUserExtension>
+	public fun <ModuleUserExtension : Any> createModule(initialVersionKey: String, content: ModuleTemplate.CreateModule<ModuleUserExtension>): ModuleTemplate<ModuleUserExtension>
 
 	public suspend fun <ModuleUserExtension : Any> synchronize(conent: ModuleTemplate<ModuleUserExtension>): SynchronizedDatabase<ModuleUserExtension>
 }
\ No newline at end of file