diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4d936b6..e4df7b8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 18.x, 20.7]
+        node-version: [14.x, 16.x, 18.x, 20.x]
 
     steps:
       - name: Checkout
diff --git a/index.d.ts b/index.d.ts
index a604911..4b1e02b 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -639,7 +639,12 @@ declare class Request extends Mixin(Command, AsyncEventEmitter) {
   /**
    * Creates an instance of Request.
    */
-  constructor(type: number, affectedOrRequestedClassUid: string, hasDataset: boolean);
+  constructor(
+    type: number,
+    affectedOrRequestedClassUid: string,
+    hasDataset: boolean,
+    metaSopClassUid?: string
+  );
 
   /**
    * Gets affected SOP class UID.
@@ -661,6 +666,16 @@ declare class Request extends Mixin(Command, AsyncEventEmitter) {
    */
   setRequestedSopClassUid(requestedSopClassUid: string): void;
 
+  /**
+   * Gets meta SOP class UID.
+   */
+  getMetaSopClassUid(): string | undefined;
+
+  /**
+   * Sets meta SOP class UID.
+   */
+  setMetaSopClassUid(metaSopClassUid: string): void;
+
   /**
    * Gets affected SOP instance UID.
    */
@@ -1071,7 +1086,11 @@ declare class NCreateRequest extends Request {
   /**
    * Creates an instance of NCreateRequest.
    */
-  constructor(affectedSopClassUid: string, affectedSopInstanceUid: string);
+  constructor(
+    affectedSopClassUid: string,
+    affectedSopInstanceUid: string,
+    metaSopClassUid?: string
+  );
 }
 
 declare class NCreateResponse extends Response {
@@ -1095,7 +1114,12 @@ declare class NActionRequest extends Request {
   /**
    * Creates an instance of NActionRequest.
    */
-  constructor(requestedSopClassUid: string, requestedSopInstanceUid: string, actionTypeId: number);
+  constructor(
+    requestedSopClassUid: string,
+    requestedSopInstanceUid: string,
+    actionTypeId: number,
+    metaSopClassUid?: string
+  );
 
   /**
    * Gets action type ID.
@@ -1140,7 +1164,11 @@ declare class NDeleteRequest extends Request {
   /**
    * Creates an instance of NDeleteRequest.
    */
-  constructor(requestedSopClassUid: string, requestedSopInstanceUid: string);
+  constructor(
+    requestedSopClassUid: string,
+    requestedSopInstanceUid: string,
+    metaSopClassUid?: string
+  );
 }
 
 declare class NDeleteResponse extends Response {
@@ -1164,7 +1192,12 @@ declare class NEventReportRequest extends Request {
   /**
    * Creates an instance of NEventReportRequest.
    */
-  constructor(affectedSopClassUid: string, affectedSopInstanceUid: string, eventTypeID: number);
+  constructor(
+    affectedSopClassUid: string,
+    affectedSopInstanceUid: string,
+    eventTypeID: number,
+    metaSopClassUid?: string
+  );
 
   /**
    * Gets event type ID.
@@ -1212,7 +1245,8 @@ declare class NGetRequest extends Request {
   constructor(
     requestedSopClassUid: string,
     requestedSopInstanceUid: string,
-    attributeIdentifierList: Array<string>
+    attributeIdentifierList: Array<string>,
+    metaSopClassUid?: string
   );
 
   /**
@@ -1247,7 +1281,11 @@ declare class NSetRequest extends Request {
   /**
    * Creates an instance of NSetRequest.
    */
-  constructor(requestedSopClassUid: string, requestedSopInstanceUid: string);
+  constructor(
+    requestedSopClassUid: string,
+    requestedSopInstanceUid: string,
+    metaSopClassUid?: string
+  );
 }
 
 declare class NSetResponse extends Response {
diff --git a/index.test-d.ts b/index.test-d.ts
index f16d97d..4cde912 100644
--- a/index.test-d.ts
+++ b/index.test-d.ts
@@ -145,16 +145,19 @@ expectType<number>(Implementation.getMaxPduLength());
 expectError(Implementation.setMaxPduLength('1'));
 
 // Request
-expectError(new Request('1', 123, 'true'));
-expectType<requests.Request>(new Request(1, '1.2.3.4.5', false));
+expectError(new Request('1', 123, 'true', 1));
+expectType<requests.Request>(new Request(1, '1.2.3.4.5', false, '5.4.3.2.1'));
 
-const request = new Request(1, '1.2.3.4.5', false);
+const request = new Request(1, '1.2.3.4.5', false, '5.4.3.2.1');
 expectType<string>(request.getAffectedSopClassUid());
 expectError(request.setAffectedSopClassUid(1));
 expectType<void>(request.setAffectedSopClassUid('1.2.3.4'));
 expectType<string>(request.getRequestedSopClassUid());
 expectError(request.setRequestedSopClassUid(1));
 expectType<void>(request.setRequestedSopClassUid('1.2.3.4'));
+expectType<string | undefined>(request.getMetaSopClassUid());
+expectError(request.setMetaSopClassUid(1));
+expectType<void>(request.setRequestedSopClassUid('5.4.3.2.1'));
 expectType<string>(request.getAffectedSopInstanceUid());
 expectError(request.setAffectedSopInstanceUid(1));
 expectType<void>(request.setAffectedSopInstanceUid('1.2.3.4'));
@@ -305,7 +308,10 @@ expectType<number>(getResponse.getFailures());
 // NCreateRequest
 expectError(new NCreateRequest(1));
 expectError(new NCreateRequest('1', 2));
-expectType<requests.NCreateRequest>(new NCreateRequest(SopClass.BasicFilmBox, '1.2.3.4.5'));
+expectError(new NCreateRequest('1', 2, 3));
+expectType<requests.NCreateRequest>(
+  new NCreateRequest(SopClass.BasicFilmBox, '1.2.3.4.5', '5.4.3.2.1')
+);
 
 // NCreateResponse
 expectError(new NCreateResponse('1', 2, '3', 4));
@@ -315,13 +321,14 @@ expectType<responses.NCreateResponse>(
 
 // NActionRequest
 expectError(new NActionRequest(1));
-expectError(new NActionRequest('1', 2, '3'));
+expectError(new NActionRequest('1', 2, '3', 1));
 expectType<requests.NActionRequest>(
-  new NActionRequest(SopClass.BasicFilmSession, '1.2.3.4.5', 0x01)
+  new NActionRequest(SopClass.BasicFilmSession, '1.2.3.4.5', 0x01, '5.4.3.2.1')
 );
 
 const actionRequest = new NActionRequest(SopClass.PrintJob, '1.2.3.4.5', 0x01);
 expectType<number>(actionRequest.getActionTypeId());
+expectType<string | undefined>(actionRequest.getMetaSopClassUid());
 expectError(actionRequest.setActionTypeId('1'));
 
 // NActionResponse
@@ -345,7 +352,10 @@ expectError(actionResponse.setActionTypeId('1'));
 // NDeleteRequest
 expectError(new NDeleteRequest(1));
 expectError(new NDeleteRequest('1', 2));
-expectType<requests.NDeleteRequest>(new NDeleteRequest(SopClass.BasicFilmSession, '1.2.3.4.5'));
+expectError(new NDeleteRequest('1', 2, 3));
+expectType<requests.NDeleteRequest>(
+  new NDeleteRequest(SopClass.BasicFilmSession, '1.2.3.4.5', '5.4.3.2.1')
+);
 
 // NDeleteResponse
 expectError(new NDeleteResponse('1', 2, '3', 4));
@@ -356,8 +366,9 @@ expectType<responses.NDeleteResponse>(
 // NEventReportRequest
 expectError(new NEventReportRequest(1));
 expectError(new NEventReportRequest('1', 2, '3'));
+expectError(new NEventReportRequest('1', 2, '3', 4));
 expectType<requests.NEventReportRequest>(
-  new NEventReportRequest(SopClass.PrintJob, '1.2.3.4.5', 0x01)
+  new NEventReportRequest(SopClass.PrintJob, '1.2.3.4.5', 0x01, '5.4.3.2.1')
 );
 
 const eventReportRequest = new NEventReportRequest(SopClass.PrintJob, '1.2.3.4.5', 0x01);
@@ -385,14 +396,14 @@ expectError(eventReportResponse.setEventTypeId('1'));
 // NGetRequest
 expectError(new NGetRequest(1));
 expectError(new NGetRequest('1', 2));
-expectError(new NGetRequest('1', 2, '3'));
+expectError(new NGetRequest('1', 2, '3', 4));
 expectType<requests.NGetRequest>(
-  new NGetRequest(SopClass.BasicGrayscaleImageBox, '1.2.3.4.5', ['PatientID'])
+  new NGetRequest(SopClass.BasicGrayscaleImageBox, '1.2.3.4.5', ['PatientID'], '5.4.3.2.1')
 );
 
-const cGetRequest = new NGetRequest(SopClass.BasicGrayscaleImageBox, '1.2.3.4.5', ['PatientID']);
-expectType<Array<string>>(cGetRequest.getAttributeIdentifierList());
-expectError(cGetRequest.setAttributeIdentifierList('1'));
+const nGetRequest = new NGetRequest(SopClass.BasicGrayscaleImageBox, '1.2.3.4.5', ['PatientID']);
+expectType<Array<string>>(nGetRequest.getAttributeIdentifierList());
+expectError(nGetRequest.setAttributeIdentifierList('1'));
 
 // NGetResponse
 expectError(new NGetResponse('1', 2, '3', 4));
@@ -405,7 +416,10 @@ expectType<responses.NGetResponse>(
 // NSetRequest
 expectError(new NSetRequest(1));
 expectError(new NSetRequest('1', 2));
-expectType<requests.NSetRequest>(new NSetRequest(SopClass.BasicFilmSession, '1.2.3.4.5'));
+expectError(new NSetRequest('1', 2, 3));
+expectType<requests.NSetRequest>(
+  new NSetRequest(SopClass.BasicFilmSession, '1.2.3.4.5', undefined)
+);
 
 // NSetResponse
 expectError(new NSetResponse('1', 2, '3', 4));
diff --git a/package-lock.json b/package-lock.json
index 68b6f32..c71cd46 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,40 +1,40 @@
 {
   "name": "dcmjs-dimse",
-  "version": "0.1.28",
+  "version": "0.1.29",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "dcmjs-dimse",
-      "version": "0.1.28",
+      "version": "0.1.29",
       "license": "MIT",
       "dependencies": {
         "async-eventemitter": "^0.2.4",
         "dcmjs": "^0.33.0",
         "smart-buffer": "^4.2.0",
         "ts-mixer": "^6.0.4",
-        "winston": "^3.13.1"
+        "winston": "^3.15.0"
       },
       "devDependencies": {
         "@types/async-eventemitter": "^0.2.4",
-        "@types/node": "^20.14.11",
+        "@types/node": "^22.7.5",
         "c8": "^9.1.0",
         "chai": "^4.3.10",
         "docdash": "^2.0.2",
         "eslint": "^8.57.0",
         "jsdoc": "^4.0.3",
-        "mocha": "^10.6.0",
-        "mock-fs": "^5.2.0",
-        "nodemon": "^3.1.4",
+        "mocha": "^10.7.3",
+        "mock-fs": "^5.4.0",
+        "nodemon": "^3.1.7",
         "open-cli": "^7.2.0",
         "prettier": "^3.3.3",
         "selfsigned": "^2.4.1",
         "shx": "^0.3.3",
         "terser-webpack-plugin": "^5.3.10",
         "ts-node": "^10.9.2",
-        "tsd": "^0.31.1",
-        "typescript": "^5.5.3",
-        "webpack": "^5.93.0",
+        "tsd": "^0.31.2",
+        "typescript": "^5.1.3",
+        "webpack": "^5.95.0",
         "webpack-cli": "^5.1.4"
       },
       "funding": {
@@ -586,16 +586,6 @@
         "@types/json-schema": "*"
       }
     },
-    "node_modules/@types/eslint-scope": {
-      "version": "3.7.7",
-      "resolved": "https://registry.npmjs.org/@types/eslint-scope/-/eslint-scope-3.7.7.tgz",
-      "integrity": "sha512-MzMFlSLBqNF2gcHWO0G1vP/YQyfvrxZ0bF+u7mzUdZ1/xK4A4sru+nraZz5i3iEIk1l1uyicaDVTB4QbbEkAYg==",
-      "dev": true,
-      "dependencies": {
-        "@types/eslint": "*",
-        "@types/estree": "*"
-      }
-    },
     "node_modules/@types/estree": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.5.tgz",
@@ -649,12 +639,12 @@
       "dev": true
     },
     "node_modules/@types/node": {
-      "version": "20.14.11",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.14.11.tgz",
-      "integrity": "sha512-kprQpL8MMeszbz6ojB5/tU8PLN4kesnN8Gjzw349rDlNgsSzg90lAVj3llK99Dh7JON+t9AuscPPFW6mPbTnSA==",
+      "version": "22.7.5",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.7.5.tgz",
+      "integrity": "sha512-jML7s2NAzMWc//QSJ1a3prpk78cOPchGvXJsC3C6R6PSMoooztvRVQEz89gmBTBY1SPMaqo5teB4uNHPdetShQ==",
       "dev": true,
       "dependencies": {
-        "undici-types": "~5.26.4"
+        "undici-types": "~6.19.2"
       }
     },
     "node_modules/@types/node-forge": {
@@ -1579,9 +1569,9 @@
       }
     },
     "node_modules/dcmjs": {
-      "version": "0.33.0",
-      "resolved": "https://registry.npmjs.org/dcmjs/-/dcmjs-0.33.0.tgz",
-      "integrity": "sha512-8QfVA+TeuuKoVyhkJo/iCFDnpiNGDDrRQdM/tsi7gm1a/gNt4yYUBXLDho+CmVgvsaKccv7UMZBrGfmVDfNLvg==",
+      "version": "0.33.1",
+      "resolved": "https://registry.npmjs.org/dcmjs/-/dcmjs-0.33.1.tgz",
+      "integrity": "sha512-/vwOPAX5fOQSwqf8t7bV7sy1h2h+gTWw5t/be8OIY7IwUpuKuKRChZvxINAjNZ9DDWHMB/uSOS7NJceu1YChfQ==",
       "dependencies": {
         "@babel/runtime-corejs3": "^7.22.5",
         "adm-zip": "^0.5.10",
@@ -1788,9 +1778,9 @@
       "integrity": "sha512-AKrN98kuwOzMIdAizXGI86UFBoo26CL21UM763y1h/GMSJ4/OHU9k2YlsmBpyScFo/wbLzWQJBMCW4+IO3/+OQ=="
     },
     "node_modules/enhanced-resolve": {
-      "version": "5.17.0",
-      "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.17.0.tgz",
-      "integrity": "sha512-dwDPwZL0dmye8Txp2gzFmA6sxALaSvdRDjPH0viLcKrtlOL3tw62nWWweVD1SdILDTJrbrL6tdWVN58Wo6U3eA==",
+      "version": "5.17.1",
+      "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.17.1.tgz",
+      "integrity": "sha512-LMHl3dXhTcfv8gM4kEzIUeTQ+7fpdA0l2tUf34BddXPkz2A5xJ5L/Pchd5BL6rdccM9QGvu0sWZzK1Z1t4wwyg==",
       "dev": true,
       "dependencies": {
         "graceful-fs": "^4.2.4",
@@ -3713,9 +3703,9 @@
       }
     },
     "node_modules/mocha": {
-      "version": "10.6.0",
-      "resolved": "https://registry.npmjs.org/mocha/-/mocha-10.6.0.tgz",
-      "integrity": "sha512-hxjt4+EEB0SA0ZDygSS015t65lJw/I2yRCS3Ae+SJ5FrbzrXgfYwJr96f0OvIXdj7h4lv/vLCrH3rkiuizFSvw==",
+      "version": "10.7.3",
+      "resolved": "https://registry.npmjs.org/mocha/-/mocha-10.7.3.tgz",
+      "integrity": "sha512-uQWxAu44wwiACGqjbPYmjo7Lg8sFrS3dQe7PP2FQI+woptP4vZXSMcfMyFL/e1yFEeEpV4RtyTpZROOKmxis+A==",
       "dev": true,
       "dependencies": {
         "ansi-colors": "^4.1.3",
@@ -3847,9 +3837,9 @@
       }
     },
     "node_modules/mock-fs": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/mock-fs/-/mock-fs-5.2.0.tgz",
-      "integrity": "sha512-2dF2R6YMSZbpip1V1WHKGLNjr/k48uQClqMVb5H3MOvwc9qhYis3/IWbj02qIg/Y8MDXKFF4c5v0rxx2o6xTZw==",
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/mock-fs/-/mock-fs-5.4.0.tgz",
+      "integrity": "sha512-3ROPnEMgBOkusBMYQUW2rnT3wZwsgfOKzJDLvx/TZ7FL1WmWvwSwn3j4aDR5fLDGtgcc1WF0Z1y0di7c9L4FKw==",
       "dev": true,
       "engines": {
         "node": ">=12.0.0"
@@ -3897,9 +3887,9 @@
       "dev": true
     },
     "node_modules/nodemon": {
-      "version": "3.1.4",
-      "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.4.tgz",
-      "integrity": "sha512-wjPBbFhtpJwmIeY2yP7QF+UKzPfltVGtfce1g/bB15/8vCGZj8uxD62b/b9M9/WVgme0NZudpownKN+c0plXlQ==",
+      "version": "3.1.7",
+      "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.7.tgz",
+      "integrity": "sha512-hLj7fuMow6f0lbB0cD14Lz2xNjwsyruH251Pk4t/yIitCFJbmY1myuLlHm/q06aST4jg6EgAh74PIBBrRqpVAQ==",
       "dev": true,
       "dependencies": {
         "chokidar": "^3.5.2",
@@ -5494,9 +5484,9 @@
       }
     },
     "node_modules/tsd": {
-      "version": "0.31.1",
-      "resolved": "https://registry.npmjs.org/tsd/-/tsd-0.31.1.tgz",
-      "integrity": "sha512-sSL84A0SFwx2xGMWrxlGaarKFSQszWjJS2vgNDDLwatytzg2aq6ShlwHsBYxRNmjzXISODwMva5ZOdAg/4AoOA==",
+      "version": "0.31.2",
+      "resolved": "https://registry.npmjs.org/tsd/-/tsd-0.31.2.tgz",
+      "integrity": "sha512-VplBAQwvYrHzVihtzXiUVXu5bGcr7uH1juQZ1lmKgkuGNGT+FechUCqmx9/zk7wibcqR2xaNEwCkDyKh+VVZnQ==",
       "dev": true,
       "dependencies": {
         "@tsd/typescript": "~5.4.3",
@@ -5631,9 +5621,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.5.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.5.3.tgz",
-      "integrity": "sha512-/hreyEujaB0w76zKo6717l3L0o/qEUtRgdvUBvlkhoWeOVMjMuHNHk0BRBzikzuGDqNmPQbg5ifMEqsHLiIUcQ==",
+      "version": "5.6.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.6.3.tgz",
+      "integrity": "sha512-hjcS1mhfuyi4WW8IWtjP7brDrG2cuDZukyrYrSauoXGNgx0S7zceP07adYkJycEr56BOUTNPzbInooiN3fn1qw==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -5662,9 +5652,9 @@
       "dev": true
     },
     "node_modules/undici-types": {
-      "version": "5.26.5",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-5.26.5.tgz",
-      "integrity": "sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==",
+      "version": "6.19.8",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
+      "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==",
       "dev": true
     },
     "node_modules/unique-string": {
@@ -5779,12 +5769,11 @@
       }
     },
     "node_modules/webpack": {
-      "version": "5.93.0",
-      "resolved": "https://registry.npmjs.org/webpack/-/webpack-5.93.0.tgz",
-      "integrity": "sha512-Y0m5oEY1LRuwly578VqluorkXbvXKh7U3rLoQCEO04M97ScRr44afGVkI0FQFsXzysk5OgFAxjZAb9rsGQVihA==",
+      "version": "5.95.0",
+      "resolved": "https://registry.npmjs.org/webpack/-/webpack-5.95.0.tgz",
+      "integrity": "sha512-2t3XstrKULz41MNMBF+cJ97TyHdyQ8HCt//pqErqDvNjU9YQBnZxIHa11VXsi7F3mb5/aO2tuDxdeTPdU7xu9Q==",
       "dev": true,
       "dependencies": {
-        "@types/eslint-scope": "^3.7.3",
         "@types/estree": "^1.0.5",
         "@webassemblyjs/ast": "^1.12.1",
         "@webassemblyjs/wasm-edit": "^1.12.1",
@@ -5793,7 +5782,7 @@
         "acorn-import-attributes": "^1.9.5",
         "browserslist": "^4.21.10",
         "chrome-trace-event": "^1.0.2",
-        "enhanced-resolve": "^5.17.0",
+        "enhanced-resolve": "^5.17.1",
         "es-module-lexer": "^1.2.1",
         "eslint-scope": "5.1.1",
         "events": "^3.2.0",
@@ -5967,9 +5956,9 @@
       "dev": true
     },
     "node_modules/winston": {
-      "version": "3.13.1",
-      "resolved": "https://registry.npmjs.org/winston/-/winston-3.13.1.tgz",
-      "integrity": "sha512-SvZit7VFNvXRzbqGHsv5KSmgbEYR5EiQfDAL9gxYkRqa934Hnk++zze0wANKtMHcy/gI4W/3xmSDwlhf865WGw==",
+      "version": "3.15.0",
+      "resolved": "https://registry.npmjs.org/winston/-/winston-3.15.0.tgz",
+      "integrity": "sha512-RhruH2Cj0bV0WgNL+lOfoUBI4DVfdUNjVnJGVovWZmrcKtrFTTRzgXYK2O9cymSGjrERCtaAeHwMNnUWXlwZow==",
       "dependencies": {
         "@colors/colors": "^1.6.0",
         "@dabh/diagnostics": "^2.0.2",
@@ -6564,16 +6553,6 @@
         "@types/json-schema": "*"
       }
     },
-    "@types/eslint-scope": {
-      "version": "3.7.7",
-      "resolved": "https://registry.npmjs.org/@types/eslint-scope/-/eslint-scope-3.7.7.tgz",
-      "integrity": "sha512-MzMFlSLBqNF2gcHWO0G1vP/YQyfvrxZ0bF+u7mzUdZ1/xK4A4sru+nraZz5i3iEIk1l1uyicaDVTB4QbbEkAYg==",
-      "dev": true,
-      "requires": {
-        "@types/eslint": "*",
-        "@types/estree": "*"
-      }
-    },
     "@types/estree": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.5.tgz",
@@ -6627,12 +6606,12 @@
       "dev": true
     },
     "@types/node": {
-      "version": "20.14.11",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.14.11.tgz",
-      "integrity": "sha512-kprQpL8MMeszbz6ojB5/tU8PLN4kesnN8Gjzw349rDlNgsSzg90lAVj3llK99Dh7JON+t9AuscPPFW6mPbTnSA==",
+      "version": "22.7.5",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.7.5.tgz",
+      "integrity": "sha512-jML7s2NAzMWc//QSJ1a3prpk78cOPchGvXJsC3C6R6PSMoooztvRVQEz89gmBTBY1SPMaqo5teB4uNHPdetShQ==",
       "dev": true,
       "requires": {
-        "undici-types": "~5.26.4"
+        "undici-types": "~6.19.2"
       }
     },
     "@types/node-forge": {
@@ -7349,9 +7328,9 @@
       }
     },
     "dcmjs": {
-      "version": "0.33.0",
-      "resolved": "https://registry.npmjs.org/dcmjs/-/dcmjs-0.33.0.tgz",
-      "integrity": "sha512-8QfVA+TeuuKoVyhkJo/iCFDnpiNGDDrRQdM/tsi7gm1a/gNt4yYUBXLDho+CmVgvsaKccv7UMZBrGfmVDfNLvg==",
+      "version": "0.33.1",
+      "resolved": "https://registry.npmjs.org/dcmjs/-/dcmjs-0.33.1.tgz",
+      "integrity": "sha512-/vwOPAX5fOQSwqf8t7bV7sy1h2h+gTWw5t/be8OIY7IwUpuKuKRChZvxINAjNZ9DDWHMB/uSOS7NJceu1YChfQ==",
       "requires": {
         "@babel/runtime-corejs3": "^7.22.5",
         "adm-zip": "^0.5.10",
@@ -7501,9 +7480,9 @@
       "integrity": "sha512-AKrN98kuwOzMIdAizXGI86UFBoo26CL21UM763y1h/GMSJ4/OHU9k2YlsmBpyScFo/wbLzWQJBMCW4+IO3/+OQ=="
     },
     "enhanced-resolve": {
-      "version": "5.17.0",
-      "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.17.0.tgz",
-      "integrity": "sha512-dwDPwZL0dmye8Txp2gzFmA6sxALaSvdRDjPH0viLcKrtlOL3tw62nWWweVD1SdILDTJrbrL6tdWVN58Wo6U3eA==",
+      "version": "5.17.1",
+      "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.17.1.tgz",
+      "integrity": "sha512-LMHl3dXhTcfv8gM4kEzIUeTQ+7fpdA0l2tUf34BddXPkz2A5xJ5L/Pchd5BL6rdccM9QGvu0sWZzK1Z1t4wwyg==",
       "dev": true,
       "requires": {
         "graceful-fs": "^4.2.4",
@@ -8879,9 +8858,9 @@
       "dev": true
     },
     "mocha": {
-      "version": "10.6.0",
-      "resolved": "https://registry.npmjs.org/mocha/-/mocha-10.6.0.tgz",
-      "integrity": "sha512-hxjt4+EEB0SA0ZDygSS015t65lJw/I2yRCS3Ae+SJ5FrbzrXgfYwJr96f0OvIXdj7h4lv/vLCrH3rkiuizFSvw==",
+      "version": "10.7.3",
+      "resolved": "https://registry.npmjs.org/mocha/-/mocha-10.7.3.tgz",
+      "integrity": "sha512-uQWxAu44wwiACGqjbPYmjo7Lg8sFrS3dQe7PP2FQI+woptP4vZXSMcfMyFL/e1yFEeEpV4RtyTpZROOKmxis+A==",
       "dev": true,
       "requires": {
         "ansi-colors": "^4.1.3",
@@ -8987,9 +8966,9 @@
       }
     },
     "mock-fs": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/mock-fs/-/mock-fs-5.2.0.tgz",
-      "integrity": "sha512-2dF2R6YMSZbpip1V1WHKGLNjr/k48uQClqMVb5H3MOvwc9qhYis3/IWbj02qIg/Y8MDXKFF4c5v0rxx2o6xTZw==",
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/mock-fs/-/mock-fs-5.4.0.tgz",
+      "integrity": "sha512-3ROPnEMgBOkusBMYQUW2rnT3wZwsgfOKzJDLvx/TZ7FL1WmWvwSwn3j4aDR5fLDGtgcc1WF0Z1y0di7c9L4FKw==",
       "dev": true
     },
     "ms": {
@@ -9031,9 +9010,9 @@
       "dev": true
     },
     "nodemon": {
-      "version": "3.1.4",
-      "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.4.tgz",
-      "integrity": "sha512-wjPBbFhtpJwmIeY2yP7QF+UKzPfltVGtfce1g/bB15/8vCGZj8uxD62b/b9M9/WVgme0NZudpownKN+c0plXlQ==",
+      "version": "3.1.7",
+      "resolved": "https://registry.npmjs.org/nodemon/-/nodemon-3.1.7.tgz",
+      "integrity": "sha512-hLj7fuMow6f0lbB0cD14Lz2xNjwsyruH251Pk4t/yIitCFJbmY1myuLlHm/q06aST4jg6EgAh74PIBBrRqpVAQ==",
       "dev": true,
       "requires": {
         "chokidar": "^3.5.2",
@@ -10127,9 +10106,9 @@
       }
     },
     "tsd": {
-      "version": "0.31.1",
-      "resolved": "https://registry.npmjs.org/tsd/-/tsd-0.31.1.tgz",
-      "integrity": "sha512-sSL84A0SFwx2xGMWrxlGaarKFSQszWjJS2vgNDDLwatytzg2aq6ShlwHsBYxRNmjzXISODwMva5ZOdAg/4AoOA==",
+      "version": "0.31.2",
+      "resolved": "https://registry.npmjs.org/tsd/-/tsd-0.31.2.tgz",
+      "integrity": "sha512-VplBAQwvYrHzVihtzXiUVXu5bGcr7uH1juQZ1lmKgkuGNGT+FechUCqmx9/zk7wibcqR2xaNEwCkDyKh+VVZnQ==",
       "dev": true,
       "requires": {
         "@tsd/typescript": "~5.4.3",
@@ -10224,9 +10203,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "5.5.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.5.3.tgz",
-      "integrity": "sha512-/hreyEujaB0w76zKo6717l3L0o/qEUtRgdvUBvlkhoWeOVMjMuHNHk0BRBzikzuGDqNmPQbg5ifMEqsHLiIUcQ==",
+      "version": "5.6.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.6.3.tgz",
+      "integrity": "sha512-hjcS1mhfuyi4WW8IWtjP7brDrG2cuDZukyrYrSauoXGNgx0S7zceP07adYkJycEr56BOUTNPzbInooiN3fn1qw==",
       "dev": true
     },
     "uc.micro": {
@@ -10248,9 +10227,9 @@
       "dev": true
     },
     "undici-types": {
-      "version": "5.26.5",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-5.26.5.tgz",
-      "integrity": "sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==",
+      "version": "6.19.8",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
+      "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==",
       "dev": true
     },
     "unique-string": {
@@ -10330,12 +10309,11 @@
       }
     },
     "webpack": {
-      "version": "5.93.0",
-      "resolved": "https://registry.npmjs.org/webpack/-/webpack-5.93.0.tgz",
-      "integrity": "sha512-Y0m5oEY1LRuwly578VqluorkXbvXKh7U3rLoQCEO04M97ScRr44afGVkI0FQFsXzysk5OgFAxjZAb9rsGQVihA==",
+      "version": "5.95.0",
+      "resolved": "https://registry.npmjs.org/webpack/-/webpack-5.95.0.tgz",
+      "integrity": "sha512-2t3XstrKULz41MNMBF+cJ97TyHdyQ8HCt//pqErqDvNjU9YQBnZxIHa11VXsi7F3mb5/aO2tuDxdeTPdU7xu9Q==",
       "dev": true,
       "requires": {
-        "@types/eslint-scope": "^3.7.3",
         "@types/estree": "^1.0.5",
         "@webassemblyjs/ast": "^1.12.1",
         "@webassemblyjs/wasm-edit": "^1.12.1",
@@ -10344,7 +10322,7 @@
         "acorn-import-attributes": "^1.9.5",
         "browserslist": "^4.21.10",
         "chrome-trace-event": "^1.0.2",
-        "enhanced-resolve": "^5.17.0",
+        "enhanced-resolve": "^5.17.1",
         "es-module-lexer": "^1.2.1",
         "eslint-scope": "5.1.1",
         "events": "^3.2.0",
@@ -10456,9 +10434,9 @@
       "dev": true
     },
     "winston": {
-      "version": "3.13.1",
-      "resolved": "https://registry.npmjs.org/winston/-/winston-3.13.1.tgz",
-      "integrity": "sha512-SvZit7VFNvXRzbqGHsv5KSmgbEYR5EiQfDAL9gxYkRqa934Hnk++zze0wANKtMHcy/gI4W/3xmSDwlhf865WGw==",
+      "version": "3.15.0",
+      "resolved": "https://registry.npmjs.org/winston/-/winston-3.15.0.tgz",
+      "integrity": "sha512-RhruH2Cj0bV0WgNL+lOfoUBI4DVfdUNjVnJGVovWZmrcKtrFTTRzgXYK2O9cymSGjrERCtaAeHwMNnUWXlwZow==",
       "requires": {
         "@colors/colors": "^1.6.0",
         "@dabh/diagnostics": "^2.0.2",
diff --git a/package.json b/package.json
index 51ae6a2..756ed64 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "dcmjs-dimse",
-  "version": "0.1.28",
+  "version": "0.1.29",
   "description": "DICOM DIMSE implementation for Node.js using dcmjs",
   "main": "build/dcmjs-dimse.min.js",
   "module": "build/dcmjs-dimse.min.js",
@@ -47,28 +47,28 @@
     "dcmjs": "^0.33.0",
     "smart-buffer": "^4.2.0",
     "ts-mixer": "^6.0.4",
-    "winston": "^3.13.1"
+    "winston": "^3.15.0"
   },
   "devDependencies": {
     "@types/async-eventemitter": "^0.2.4",
-    "@types/node": "^20.14.11",
+    "@types/node": "^22.7.5",
     "c8": "^9.1.0",
     "chai": "^4.3.10",
     "docdash": "^2.0.2",
     "eslint": "^8.57.0",
     "jsdoc": "^4.0.3",
-    "mocha": "^10.6.0",
-    "mock-fs": "^5.2.0",
-    "nodemon": "^3.1.4",
+    "mocha": "^10.7.3",
+    "mock-fs": "^5.4.0",
+    "nodemon": "^3.1.7",
     "open-cli": "^7.2.0",
     "prettier": "^3.3.3",
     "selfsigned": "^2.4.1",
     "shx": "^0.3.3",
     "terser-webpack-plugin": "^5.3.10",
     "ts-node": "^10.9.2",
-    "tsd": "^0.31.1",
-    "typescript": "^5.5.3",
-    "webpack": "^5.93.0",
+    "tsd": "^0.31.2",
+    "typescript": "^5.6.3",
+    "webpack": "^5.95.0",
     "webpack-cli": "^5.1.4"
   }
 }
diff --git a/src/Association.js b/src/Association.js
index b0bfc90..324e482 100644
--- a/src/Association.js
+++ b/src/Association.js
@@ -738,7 +738,6 @@ class Association {
           context.getAbstractSyntaxUid()
         }`
       );
-
       const syntaxes = context.getTransferSyntaxUids();
       syntaxes.forEach((tx) => {
         str.push(`      Transfer:  ${this._uidNameFromValue(TransferSyntax, tx) || tx}`);
@@ -776,15 +775,20 @@ class Association {
       case CommandFieldType.NSetRequest:
       case CommandFieldType.NActionRequest:
       case CommandFieldType.NDeleteRequest:
-        return request.getRequestedSopClassUid();
+        return request.getMetaSopClassUid() !== undefined
+          ? request.getMetaSopClassUid()
+          : request.getRequestedSopClassUid();
       case CommandFieldType.CStoreRequest:
       case CommandFieldType.CFindRequest:
       case CommandFieldType.CGetRequest:
       case CommandFieldType.CMoveRequest:
       case CommandFieldType.CEchoRequest:
+        return request.getAffectedSopClassUid();
       case CommandFieldType.NEventReportRequest:
       case CommandFieldType.NCreateRequest:
-        return request.getAffectedSopClassUid();
+        return request.getMetaSopClassUid() !== undefined
+          ? request.getMetaSopClassUid()
+          : request.getAffectedSopClassUid();
       default:
         return request.getAffectedSopClassUid();
     }
diff --git a/src/Command.js b/src/Command.js
index 486ed68..9f3b2cc 100644
--- a/src/Command.js
+++ b/src/Command.js
@@ -179,8 +179,9 @@ class Request extends Mixin(Command, AsyncEventEmitter) {
    * @param {number} type - Command field type.
    * @param {string} affectedOrRequestedClassUid - Affected or requested SOP Class UID.
    * @param {boolean} hasDataset - Request has dataset.
+   * @param {string} [metaSopClassUid] - Meta SOP Class UID.
    */
-  constructor(type, affectedOrRequestedClassUid, hasDataset) {
+  constructor(type, affectedOrRequestedClassUid, hasDataset, metaSopClassUid) {
     super(
       new Dataset({
         CommandField: type,
@@ -198,6 +199,7 @@ class Request extends Mixin(Command, AsyncEventEmitter) {
         this.setAffectedSopClassUid(affectedOrRequestedClassUid);
         break;
     }
+    this.metaSopClassUid = metaSopClassUid;
   }
 
   /**
@@ -240,6 +242,24 @@ class Request extends Mixin(Command, AsyncEventEmitter) {
     command.setElement('RequestedSOPClassUID', requestedSopClassUid);
   }
 
+  /**
+   * Gets meta SOP class UID.
+   * @method
+   * @returns {string} Meta SOP class UID.
+   */
+  getMetaSopClassUid() {
+    return this.metaSopClassUid;
+  }
+
+  /**
+   * Sets meta SOP class UID.
+   * @method
+   * @param {string} metaSopClassUid - Meta SOP class UID.
+   */
+  setMetaSopClassUid(metaSopClassUid) {
+    this.metaSopClassUid = metaSopClassUid;
+  }
+
   /**
    * Gets affected SOP instance UID.
    * @method
@@ -1377,10 +1397,12 @@ class NCreateRequest extends Request {
    * @constructor
    * @param {string} affectedSopClassUid - Affected SOP Class UID.
    * @param {string} affectedSopInstanceUid - Affected SOP Instance UID.
+   * @param {string} [metaSopClassUid] - Meta SOP Class UID.
    */
-  constructor(affectedSopClassUid, affectedSopInstanceUid) {
+  constructor(affectedSopClassUid, affectedSopInstanceUid, metaSopClassUid) {
     super(CommandFieldType.NCreateRequest, affectedSopClassUid, false);
     this.setAffectedSopInstanceUid(affectedSopInstanceUid);
+    this.setMetaSopClassUid(metaSopClassUid);
   }
 }
 //#endregion
@@ -1432,11 +1454,13 @@ class NActionRequest extends Request {
    * @param {string} requestedSopClassUid - Requested SOP Class UID.
    * @param {string} requestedSopInstanceUid - Requested SOP Instance UID.
    * @param {number} actionTypeId - Action type ID.
+   * @param {string} [metaSopClassUid] - Meta SOP Class UID.
    */
-  constructor(requestedSopClassUid, requestedSopInstanceUid, actionTypeId) {
+  constructor(requestedSopClassUid, requestedSopInstanceUid, actionTypeId, metaSopClassUid) {
     super(CommandFieldType.NActionRequest, requestedSopClassUid, false);
     this.setRequestedSopInstanceUid(requestedSopInstanceUid);
     this.setActionTypeId(actionTypeId);
+    this.setMetaSopClassUid(metaSopClassUid);
   }
 
   /**
@@ -1530,10 +1554,12 @@ class NDeleteRequest extends Request {
    * @constructor
    * @param {string} requestedSopClassUid - Requested SOP Class UID.
    * @param {string} requestedSopInstanceUid - Requested SOP Instance UID.
+   * @param {string} [metaSopClassUid] - Meta SOP Class UID.
    */
-  constructor(requestedSopClassUid, requestedSopInstanceUid) {
+  constructor(requestedSopClassUid, requestedSopInstanceUid, metaSopClassUid) {
     super(CommandFieldType.NDeleteRequest, requestedSopClassUid, false);
     this.setRequestedSopInstanceUid(requestedSopInstanceUid);
+    this.setMetaSopClassUid(metaSopClassUid);
   }
 }
 //#endregion
@@ -1585,11 +1611,13 @@ class NEventReportRequest extends Request {
    * @param {string} affectedSopClassUid - Affected SOP Class UID.
    * @param {string} affectedSopInstanceUid - Affected SOP Instance UID.
    * @param {number} eventTypeID - Event type ID.
+   * @param {string} [metaSopClassUid] - Meta SOP Class UID.
    */
-  constructor(affectedSopClassUid, affectedSopInstanceUid, eventTypeID) {
+  constructor(affectedSopClassUid, affectedSopInstanceUid, eventTypeID, metaSopClassUid) {
     super(CommandFieldType.NEventReportRequest, affectedSopClassUid, false);
     this.setAffectedSopInstanceUid(affectedSopInstanceUid);
     this.setEventTypeId(eventTypeID);
+    this.setMetaSopClassUid(metaSopClassUid);
   }
 
   /**
@@ -1684,13 +1712,20 @@ class NGetRequest extends Request {
    * @param {string} requestedSopClassUid - Requested SOP Class UID.
    * @param {string} requestedSopInstanceUid - Requested SOP Instance UID.
    * @param {Array<string>} attributeIdentifierList - The requested attributes identifier list.
+   * @param {string} [metaSopClassUid] - Meta SOP Class UID.
    */
-  constructor(requestedSopClassUid, requestedSopInstanceUid, attributeIdentifierList) {
+  constructor(
+    requestedSopClassUid,
+    requestedSopInstanceUid,
+    attributeIdentifierList,
+    metaSopClassUid
+  ) {
     super(CommandFieldType.NGetRequest, requestedSopClassUid, false);
     this.setRequestedSopInstanceUid(requestedSopInstanceUid);
     this.setAttributeIdentifierList(
       !Array.isArray(attributeIdentifierList) ? [attributeIdentifierList] : attributeIdentifierList
     );
+    this.setMetaSopClassUid(metaSopClassUid);
   }
 
   /**
@@ -1805,10 +1840,12 @@ class NSetRequest extends Request {
    * @constructor
    * @param {string} requestedSopClassUid - Requested SOP Class UID.
    * @param {string} requestedSopInstanceUid - Requested SOP Instance UID.
+   * @param {string} [metaSopClassUid] - Meta SOP Class UID.
    */
-  constructor(requestedSopClassUid, requestedSopInstanceUid) {
+  constructor(requestedSopClassUid, requestedSopInstanceUid, metaSopClassUid) {
     super(CommandFieldType.NSetRequest, requestedSopClassUid, false);
     this.setRequestedSopInstanceUid(requestedSopInstanceUid);
+    this.setMetaSopClassUid(metaSopClassUid);
   }
 }
 //#endregion
diff --git a/src/version.js b/src/version.js
index 5616609..d7f4f02 100644
--- a/src/version.js
+++ b/src/version.js
@@ -1 +1 @@
-module.exports = '0.1.28';
+module.exports = '0.1.29';
diff --git a/test/Association.test.js b/test/Association.test.js
index e663fd9..5d44327 100644
--- a/test/Association.test.js
+++ b/test/Association.test.js
@@ -1,5 +1,11 @@
 const { Association } = require('./../src/Association');
-const { CGetRequest, CStoreRequest, Request } = require('./../src/Command');
+const {
+  CGetRequest,
+  CStoreRequest,
+  NCreateRequest,
+  NDeleteRequest,
+  Request,
+} = require('./../src/Command');
 const {
   CommandFieldType,
   PresentationContextResult,
@@ -271,4 +277,42 @@ describe('Association', () => {
       ...Object.values(StorageClass),
     ]);
   });
+
+  it('should correctly add presentation contexts with meta SOP classes', () => {
+    const callingAet = 'CALLINGAET';
+    const calledAet = 'CALLEDAET';
+
+    const association = new Association(callingAet, calledAet);
+    association.addPresentationContext(SopClass.BasicGrayscalePrintManagementMeta);
+    let pcId = association.addPresentationContextFromRequest(
+      new NCreateRequest(
+        SopClass.BasicFilmSession,
+        Dataset.generateDerivedUid(),
+        SopClass.BasicGrayscalePrintManagementMeta
+      )
+    );
+    pcId = association.addPresentationContextFromRequest(
+      new NCreateRequest(
+        SopClass.BasicFilmBox,
+        Dataset.generateDerivedUid(),
+        SopClass.BasicGrayscalePrintManagementMeta
+      )
+    );
+    pcId = association.addPresentationContextFromRequest(
+      new NDeleteRequest(
+        SopClass.BasicFilmBox,
+        Dataset.generateDerivedUid(),
+        SopClass.BasicGrayscalePrintManagementMeta
+      )
+    );
+    pcId = association.addPresentationContextFromRequest(
+      new NDeleteRequest(
+        SopClass.BasicFilmSession,
+        Dataset.generateDerivedUid(),
+        SopClass.BasicGrayscalePrintManagementMeta
+      )
+    );
+
+    expect(association.getPresentationContexts().length).to.be.eq(1);
+  });
 });
diff --git a/test/Commands.test.js b/test/Commands.test.js
index 78fadfb..8e99d21 100644
--- a/test/Commands.test.js
+++ b/test/Commands.test.js
@@ -55,13 +55,24 @@ describe('Command', () => {
   });
 
   it('should correctly create a request', () => {
-    const uid = Dataset.generateDerivedUid();
-    const request = new Request(1, uid, 2, true);
-    const commandDataset = request.getCommandDataset();
-
-    expect(request.getAffectedSopClassUid()).to.be.eq(uid);
-    expect(request.hasDataset()).to.be.true;
-    expect(commandDataset.getElement('CommandField')).to.be.eq(1);
+    const uid1 = Dataset.generateDerivedUid();
+    const request1 = new Request(1, uid1, true);
+    const commandDataset1 = request1.getCommandDataset();
+
+    const uid2 = Dataset.generateDerivedUid();
+    const uid3 = Dataset.generateDerivedUid();
+    const request2 = new Request(2, uid2, false, uid3);
+    const commandDataset2 = request2.getCommandDataset();
+
+    expect(request1.getAffectedSopClassUid()).to.be.eq(uid1);
+    expect(request1.getMetaSopClassUid()).to.be.undefined;
+    expect(request1.hasDataset()).to.be.true;
+    expect(commandDataset1.getElement('CommandField')).to.be.eq(1);
+
+    expect(request2.getAffectedSopClassUid()).to.be.eq(uid2);
+    expect(request2.getMetaSopClassUid()).to.be.eq(uid3);
+    expect(request2.hasDataset()).to.be.false;
+    expect(commandDataset2.getElement('CommandField')).to.be.eq(2);
   });
 
   it('should correctly create a response', () => {
@@ -257,9 +268,11 @@ describe('Command', () => {
   it('should correctly create a N-CREATE request', () => {
     const sopClassUid = Dataset.generateDerivedUid();
     const sopInstanceUid = Dataset.generateDerivedUid();
-    const request = new NCreateRequest(sopClassUid, sopInstanceUid);
+    const metaSopClassUid = Dataset.generateDerivedUid();
+    const request = new NCreateRequest(sopClassUid, sopInstanceUid, metaSopClassUid);
 
     expect(request.getAffectedSopClassUid()).to.be.eq(sopClassUid);
+    expect(request.getMetaSopClassUid()).to.be.eq(metaSopClassUid);
     expect(request.getAffectedSopInstanceUid()).to.be.eq(sopInstanceUid);
     expect(request.getCommandFieldType()).to.be.eq(CommandFieldType.NCreateRequest);
     expect(request.hasDataset()).to.be.false;
@@ -290,6 +303,7 @@ describe('Command', () => {
     const request = new NActionRequest(sopClassUid, sopInstanceUid, 0x0001);
 
     expect(request.getRequestedSopClassUid()).to.be.eq(sopClassUid);
+    expect(request.getMetaSopClassUid()).to.be.undefined;
     expect(request.getRequestedSopInstanceUid()).to.be.eq(sopInstanceUid);
     expect(request.getActionTypeId()).to.be.eq(0x0001);
     expect(request.getCommandFieldType()).to.be.eq(CommandFieldType.NActionRequest);
@@ -324,9 +338,11 @@ describe('Command', () => {
   it('should correctly create a N-DELETE request', () => {
     const sopClassUid = Dataset.generateDerivedUid();
     const sopInstanceUid = Dataset.generateDerivedUid();
-    const request = new NDeleteRequest(sopClassUid, sopInstanceUid);
+    const metaSopClassUid = Dataset.generateDerivedUid();
+    const request = new NDeleteRequest(sopClassUid, sopInstanceUid, metaSopClassUid);
 
     expect(request.getRequestedSopClassUid()).to.be.eq(sopClassUid);
+    expect(request.getMetaSopClassUid()).to.be.eq(metaSopClassUid);
     expect(request.getRequestedSopInstanceUid()).to.be.eq(sopInstanceUid);
     expect(request.getCommandFieldType()).to.be.eq(CommandFieldType.NDeleteRequest);
     expect(request.hasDataset()).to.be.false;
@@ -354,9 +370,11 @@ describe('Command', () => {
   it('should correctly create a N-EVENT-REPORT request', () => {
     const sopClassUid = Dataset.generateDerivedUid();
     const sopInstanceUid = Dataset.generateDerivedUid();
-    const request = new NEventReportRequest(sopClassUid, sopInstanceUid, 0x0001);
+    const metaSopClassUid = Dataset.generateDerivedUid();
+    const request = new NEventReportRequest(sopClassUid, sopInstanceUid, 0x0001, metaSopClassUid);
 
     expect(request.getAffectedSopClassUid()).to.be.eq(sopClassUid);
+    expect(request.getMetaSopClassUid()).to.be.eq(metaSopClassUid);
     expect(request.getAffectedSopInstanceUid()).to.be.eq(sopInstanceUid);
     expect(request.getEventTypeId()).to.be.eq(0x0001);
     expect(request.getCommandFieldType()).to.be.eq(CommandFieldType.NEventReportRequest);
@@ -412,6 +430,7 @@ describe('Command', () => {
     const request = new NGetRequest(sopClassUid, sopInstanceUid, attributeIdentifierList);
 
     expect(request.getRequestedSopClassUid()).to.be.eq(sopClassUid);
+    expect(request.getMetaSopClassUid()).to.be.undefined;
     expect(request.getRequestedSopInstanceUid()).to.be.eq(sopInstanceUid);
     expect(request.getAttributeIdentifierList()).to.have.members(attributeIdentifierList);
     expect(request.getCommandFieldType()).to.be.eq(CommandFieldType.NGetRequest);
@@ -442,9 +461,11 @@ describe('Command', () => {
   it('should correctly create a N-SET request', () => {
     const sopClassUid = Dataset.generateDerivedUid();
     const sopInstanceUid = Dataset.generateDerivedUid();
-    const request = new NSetRequest(sopClassUid, sopInstanceUid);
+    const metaSopClassUid = Dataset.generateDerivedUid();
+    const request = new NSetRequest(sopClassUid, sopInstanceUid, metaSopClassUid);
 
     expect(request.getRequestedSopClassUid()).to.be.eq(sopClassUid);
+    expect(request.getMetaSopClassUid()).to.be.eq(metaSopClassUid);
     expect(request.getRequestedSopInstanceUid()).to.be.eq(sopInstanceUid);
     expect(request.getCommandFieldType()).to.be.eq(CommandFieldType.NSetRequest);
     expect(request.hasDataset()).to.be.false;