diff --git a/.gitignore b/.gitignore
index da1741753..bc0e40a0f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 build/
+bin/
 .gradle/
 
 /.idea/sonarlint/
@@ -20,3 +21,5 @@ Gradle_*.xml
 **/ConfigDumpInfo.xml
 **/.metadata/
 benchmark-results/**
+
+.vscode/
diff --git a/src/main/java/com/github/_1c_syntax/bsl/mdo/Catalog.java b/src/main/java/com/github/_1c_syntax/bsl/mdo/Catalog.java
index 904eaf629..a8098c0b8 100644
--- a/src/main/java/com/github/_1c_syntax/bsl/mdo/Catalog.java
+++ b/src/main/java/com/github/_1c_syntax/bsl/mdo/Catalog.java
@@ -24,6 +24,7 @@
 import com.github._1c_syntax.bsl.mdo.children.ObjectCommand;
 import com.github._1c_syntax.bsl.mdo.children.ObjectForm;
 import com.github._1c_syntax.bsl.mdo.children.ObjectTemplate;
+import com.github._1c_syntax.bsl.mdo.support.CodeSeries;
 import com.github._1c_syntax.bsl.mdo.support.ObjectBelonging;
 import com.github._1c_syntax.bsl.mdo.support.RoleRight;
 import com.github._1c_syntax.bsl.mdo.utils.LazyLoader;
@@ -114,6 +115,24 @@ public class Catalog implements ReferenceObject, AccessRightsOwner {
   @Singular("addOwners")
   List<MdoReference> owners;
 
+  /**
+   * Проверять уникальность кода справочника.
+   * Определяет, нужно ли проверять уникальность кода справочника.
+   * Если значение равно false, то код справочника должен быть уникальным в пределах области,
+   * определяемой свойством {@link #codeSeries}.
+   */
+  @Default
+  boolean checkUnique = false;
+
+  /**
+   * Серия кодов справочника.
+   * Определяет область действия уникальности кода справочника.
+   * Значение по умолчанию: {@link CodeSeries#WHOLE_CATALOG}.
+   * Для формата EDT: если поле отсутствует, автоматически устанавливается значение WHOLE_CATALOG.
+   */
+  @Default
+  CodeSeries codeSeries = CodeSeries.WHOLE_CATALOG;
+
   /**
    * Возвращает перечень возможных прав доступа
    */
diff --git a/src/main/java/com/github/_1c_syntax/bsl/mdo/support/CodeSeries.java b/src/main/java/com/github/_1c_syntax/bsl/mdo/support/CodeSeries.java
new file mode 100644
index 000000000..76c6554e4
--- /dev/null
+++ b/src/main/java/com/github/_1c_syntax/bsl/mdo/support/CodeSeries.java
@@ -0,0 +1,83 @@
+/*
+ * This file is a part of MDClasses.
+ *
+ * Copyright (c) 2019 - 2025
+ * Tymko Oleg <olegtymko@yandex.ru>, Maximov Valery <maximovvalery@gmail.com> and contributors
+ *
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ *
+ * MDClasses is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3.0 of the License, or (at your option) any later version.
+ *
+ * MDClasses is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with MDClasses.
+ */
+package com.github._1c_syntax.bsl.mdo.support;
+
+import java.util.Locale;
+import java.util.Map;
+
+import com.github._1c_syntax.bsl.types.EnumWithName;
+import com.github._1c_syntax.bsl.types.MultiName;
+
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.Accessors;
+
+/**
+ * Серия кодов справочника.
+ * Определяет область действия уникальности кода справочника.
+ */
+@ToString(of = "fullName")
+public enum CodeSeries implements EnumWithName {
+  /**
+   * Весь справочник - уникальность кода проверяется во всем справочнике
+   */
+  WHOLE_CATALOG("WholeCatalog", "ВесьСправочник"),
+  /**
+   * В пределах подчинения - уникальность кода проверяется в пределах подчинения
+   */
+  WITHIN_SUBORDINATION("WithinSubordination", "ВПределахПодчинения"),
+  /**
+   * В пределах подчинения владельцу - уникальность кода проверяется в пределах подчинения владельцу
+   */
+  WITHIN_OWNER_SUBORDINATION("WithinOwnerSubordination", "ВПределахПодчиненияВладельцу");
+
+  private static final Map<String, CodeSeries> KEYS = EnumWithName.computeKeys(values());
+
+  /**
+   * Полное имя элемента перечисления (на русском и английском языках)
+   */
+  @Getter
+  @Accessors(fluent = true)
+  private final MultiName fullName;
+
+  /**
+   * Конструктор элемента перечисления
+   *
+   * @param nameEn Английское имя элемента
+   * @param nameRu Русское имя элемента
+   */
+  CodeSeries(String nameEn, String nameRu) {
+    this.fullName = MultiName.create(nameEn, nameRu);
+  }
+
+  /**
+   * Ищет элемент перечисления по именам (рус, анг).
+   * Поиск выполняется без учета регистра.
+   *
+   * @param string Имя искомого элемента
+   * @return Найденное значение, если не найден - то WHOLE_CATALOG
+   */
+  public static CodeSeries valueByName(String string) {
+    return KEYS.getOrDefault(string.toLowerCase(Locale.ROOT), WHOLE_CATALOG);
+  }
+}
+
diff --git a/src/main/java/com/github/_1c_syntax/bsl/reader/common/xstream/ExtendXStream.java b/src/main/java/com/github/_1c_syntax/bsl/reader/common/xstream/ExtendXStream.java
index 1b5890049..b2eb5fc33 100644
--- a/src/main/java/com/github/_1c_syntax/bsl/reader/common/xstream/ExtendXStream.java
+++ b/src/main/java/com/github/_1c_syntax/bsl/reader/common/xstream/ExtendXStream.java
@@ -31,6 +31,7 @@
 import com.github._1c_syntax.bsl.mdo.storage.form.FormElementType;
 import com.github._1c_syntax.bsl.mdo.support.ApplicationRunMode;
 import com.github._1c_syntax.bsl.mdo.support.AutoRecordType;
+import com.github._1c_syntax.bsl.mdo.support.CodeSeries;
 import com.github._1c_syntax.bsl.mdo.support.ConfigurationExtensionPurpose;
 import com.github._1c_syntax.bsl.mdo.support.DataLockControlMode;
 import com.github._1c_syntax.bsl.mdo.support.DataSeparation;
@@ -273,6 +274,7 @@ protected void setupConverters() {
     registerConverter(new EnumConverter<>(FormElementType.class));
     registerConverter(new EnumConverter<>(InterfaceCompatibilityMode.class));
     registerConverter(new EnumConverter<>(DateFractions.class));
+    registerConverter(new EnumConverter<>(CodeSeries.class));
   }
 
   private void init() {
diff --git a/src/test/java/com/github/_1c_syntax/bsl/mdo/CatalogTest.java b/src/test/java/com/github/_1c_syntax/bsl/mdo/CatalogTest.java
index 47e96c6c7..9c584e482 100644
--- a/src/test/java/com/github/_1c_syntax/bsl/mdo/CatalogTest.java
+++ b/src/test/java/com/github/_1c_syntax/bsl/mdo/CatalogTest.java
@@ -156,6 +156,30 @@ void testSSL(ArgumentsAccessor argumentsAccessor) {
     assertThat(stdAttribute.getValueType().contains(PrimitiveValueType.STRING)).isTrue();
   }
 
+  /**
+   * Проверяет, что для справочника "Заметки" поле checkUnique установлено в false.
+   * <p>
+   * В формате Designer: в XML файле явно указано {@code <CheckUnique>false</CheckUnique>}.
+   * В формате EDT: в XML файле поле отсутствует, используется значение по умолчанию false.
+   *
+   * @param argumentsAccessor параметры теста (формат, имя пакета, ссылка на MDO, постфикс фикстуры)
+   */
+  @ParameterizedTest
+  @CsvSource({
+    "true, ssl_3_1, Catalogs.Заметки, _edt",
+    "false, ssl_3_1, Catalogs.Заметки"
+  })
+  void testCheckUniqueFalse(ArgumentsAccessor argumentsAccessor) {
+    var mdo = MDTestUtils.getMDWithSimpleTest(argumentsAccessor);
+    assertThat(mdo)
+      .isInstanceOf(Catalog.class);
+
+    var catalog = (Catalog) mdo;
+    assertThat(catalog.isCheckUnique())
+      .as("Поле checkUnique должно быть false для справочника Заметки")
+      .isFalse();
+  }
+
   @ParameterizedTest
   @CsvSource({
     "true, ssl_3_1, Catalogs.ВерсииФайлов, _edt",
@@ -166,14 +190,4 @@ void testSSLFixture(ArgumentsAccessor argumentsAccessor) {
     assertThat(mdo)
       .isInstanceOf(Catalog.class);
   }
-
-//  private void checkExtInfo(FormDataOLD formData) {
-//    var extInfo = (DynamicListExtInfo) formData.getAttributes().get(1).getExtInfo();
-//    assertThat(extInfo)
-//      .isNotNull()
-//      .isInstanceOf(DynamicListExtInfo.class);
-//
-//    assertThat(extInfo.isCustomQuery()).isTrue();
-//    assertThat(extInfo.getQuery().getTextQuery()).isNotEmpty();
-//  }
-}
\ No newline at end of file
+}
diff --git "a/src/test/resources/fixtures/mdclasses/Catalogs.\320\241\320\277\321\200\320\260\320\262\320\276\321\207\320\275\320\270\320\2721.json" "b/src/test/resources/fixtures/mdclasses/Catalogs.\320\241\320\277\321\200\320\260\320\262\320\276\321\207\320\275\320\270\320\2721.json"
index e2711bf88..f8edfac7c 100644
--- "a/src/test/resources/fixtures/mdclasses/Catalogs.\320\241\320\277\321\200\320\260\320\262\320\276\321\207\320\275\320\270\320\2721.json"
+++ "b/src/test/resources/fixtures/mdclasses/Catalogs.\320\241\320\277\321\200\320\260\320\262\320\276\321\207\320\275\320\270\320\2721.json"
@@ -1219,6 +1219,8 @@
   "name": "Справочник1",
   "objectBelonging": "OWN",
   "owners": [],
+  "checkUnique": true,
+  "codeSeries": "WHOLE_CATALOG",
   "possibleRights": [
     {
       "default": {
diff --git "a/src/test/resources/fixtures/mdclasses/Catalogs.\320\241\320\277\321\200\320\260\320\262\320\276\321\207\320\275\320\270\320\2721_edt.json" "b/src/test/resources/fixtures/mdclasses/Catalogs.\320\241\320\277\321\200\320\260\320\262\320\276\321\207\320\275\320\270\320\2721_edt.json"
index 8af2c2973..0908be487 100644
--- "a/src/test/resources/fixtures/mdclasses/Catalogs.\320\241\320\277\321\200\320\260\320\262\320\276\321\207\320\275\320\270\320\2721_edt.json"
+++ "b/src/test/resources/fixtures/mdclasses/Catalogs.\320\241\320\277\321\200\320\260\320\262\320\276\321\207\320\275\320\270\320\2721_edt.json"
@@ -1219,6 +1219,8 @@
   "name": "Справочник1",
   "objectBelonging": "OWN",
   "owners": [],
+  "checkUnique": true,
+  "codeSeries": "WHOLE_CATALOG",
   "possibleRights": [
     {
       "default": {
diff --git a/src/test/resources/fixtures/mdclasses/Configuration.json b/src/test/resources/fixtures/mdclasses/Configuration.json
index 0cba799de..d2d77df2a 100644
--- a/src/test/resources/fixtures/mdclasses/Configuration.json
+++ b/src/test/resources/fixtures/mdclasses/Configuration.json
@@ -666,6 +666,8 @@
       "explanation": {
         "@reference": "/com.github._1c_syntax.bsl.mdclasses.Configuration/XDTOPackages/com.github._1c_syntax.bsl.mdo.XDTOPackage/synonym"
       },
+      "checkUnique": true,
+      "codeSeries": "WHOLE_CATALOG",
       "owners": []
     }
   ],
diff --git a/src/test/resources/fixtures/mdclasses/Configuration_edt.json b/src/test/resources/fixtures/mdclasses/Configuration_edt.json
index 5cb8204b0..7f7a38da6 100644
--- a/src/test/resources/fixtures/mdclasses/Configuration_edt.json
+++ b/src/test/resources/fixtures/mdclasses/Configuration_edt.json
@@ -666,6 +666,8 @@
       "explanation": {
         "@reference": "/com.github._1c_syntax.bsl.mdclasses.Configuration/XDTOPackages/com.github._1c_syntax.bsl.mdo.XDTOPackage/synonym"
       },
+      "checkUnique": true,
+      "codeSeries": "WHOLE_CATALOG",
       "owners": []
     }
   ],
diff --git a/src/test/resources/fixtures/mdclasses_3_24/Configuration_edt.json b/src/test/resources/fixtures/mdclasses_3_24/Configuration_edt.json
index f083d67a8..d39198871 100644
--- a/src/test/resources/fixtures/mdclasses_3_24/Configuration_edt.json
+++ b/src/test/resources/fixtures/mdclasses_3_24/Configuration_edt.json
@@ -666,6 +666,8 @@
       "explanation": {
         "@reference": "/com.github._1c_syntax.bsl.mdclasses.Configuration/XDTOPackages/com.github._1c_syntax.bsl.mdo.XDTOPackage/synonym"
       },
+      "checkUnique": true,
+      "codeSeries": "WHOLE_CATALOG",
       "owners": []
     }
   ],
diff --git "a/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\222\320\265\321\200\321\201\320\270\320\270\320\244\320\260\320\271\320\273\320\276\320\262.json" "b/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\222\320\265\321\200\321\201\320\270\320\270\320\244\320\260\320\271\320\273\320\276\320\262.json"
index f70acb3ad..0b710aa54 100644
--- "a/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\222\320\265\321\200\321\201\320\270\320\270\320\244\320\260\320\271\320\273\320\276\320\262.json"
+++ "b/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\222\320\265\321\200\321\201\320\270\320\270\320\244\320\260\320\271\320\273\320\276\320\262.json"
@@ -2887,6 +2887,8 @@
       "mdoRefRu": "Справочник.Файлы"
     }
   ],
+  "checkUnique": true,
+  "codeSeries": "WITHIN_OWNER_SUBORDINATION",
   "possibleRights": [
     {
       "default": {
diff --git "a/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\222\320\265\321\200\321\201\320\270\320\270\320\244\320\260\320\271\320\273\320\276\320\262_edt.json" "b/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\222\320\265\321\200\321\201\320\270\320\270\320\244\320\260\320\271\320\273\320\276\320\262_edt.json"
index 2f8f24160..3041e89dd 100644
--- "a/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\222\320\265\321\200\321\201\320\270\320\270\320\244\320\260\320\271\320\273\320\276\320\262_edt.json"
+++ "b/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\222\320\265\321\200\321\201\320\270\320\270\320\244\320\260\320\271\320\273\320\276\320\262_edt.json"
@@ -2887,6 +2887,8 @@
       "mdoRefRu": "Справочник.Файлы"
     }
   ],
+  "checkUnique": true,
+  "codeSeries": "WITHIN_OWNER_SUBORDINATION",
   "possibleRights": [
     {
       "default": {
diff --git "a/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\227\320\260\320\274\320\265\321\202\320\272\320\270.json" "b/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\227\320\260\320\274\320\265\321\202\320\272\320\270.json"
index cd6c845e6..57661027a 100644
--- "a/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\227\320\260\320\274\320\265\321\202\320\272\320\270.json"
+++ "b/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\227\320\260\320\274\320\265\321\202\320\272\320\270.json"
@@ -2326,6 +2326,8 @@
   "name": "Заметки",
   "objectBelonging": "OWN",
   "owners": [],
+  "checkUnique": false,
+  "codeSeries": "WHOLE_CATALOG",
   "possibleRights": [
     {
       "default": {
diff --git "a/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\227\320\260\320\274\320\265\321\202\320\272\320\270_edt.json" "b/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\227\320\260\320\274\320\265\321\202\320\272\320\270_edt.json"
index d10e0fb29..dbf9d9968 100644
--- "a/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\227\320\260\320\274\320\265\321\202\320\272\320\270_edt.json"
+++ "b/src/test/resources/fixtures/ssl_3_1/Catalogs.\320\227\320\260\320\274\320\265\321\202\320\272\320\270_edt.json"
@@ -2298,6 +2298,8 @@
   "name": "Заметки",
   "objectBelonging": "OWN",
   "owners": [],
+  "checkUnique": false,
+  "codeSeries": "WHOLE_CATALOG",
   "possibleRights": [
     {
       "default": {