diff --git a/packages/concerto-core/api.txt b/packages/concerto-core/api.txt
index 7098113628..ae8ed8fa7c 100644
--- a/packages/concerto-core/api.txt
+++ b/packages/concerto-core/api.txt
@@ -344,6 +344,6 @@ class Serializer {
    + Resource fromJSON(Object,Object?,boolean,boolean,number?) 
 }
 class TypeNotFoundException extends BaseException {
-   + void constructor(string,string|,string) 
+   + void constructor(string,string|,string,string) 
    + string getTypeName() 
 }
diff --git a/packages/concerto-core/changelog.txt b/packages/concerto-core/changelog.txt
index c65e01c244..a1e87d9a4a 100644
--- a/packages/concerto-core/changelog.txt
+++ b/packages/concerto-core/changelog.txt
@@ -24,8 +24,9 @@
 # Note that the latest public API is documented using JSDocs and is available in api.txt.
 #
 
-Version 3.13.3 {b286dfdeeb654d25be7c5f9cc6305e38} 2023-11-07
+Version 3.13.3 {8f59b43e6071c4d3ae42e94476142f7a} 2023-11-07
 - Added DCS and vocabulary extraction support for decoratorManager
+- Added errortype to BaseException and used that to define error types in introspect 
 
 Version 3.13.2 {dccc690753912cf87e7ceec56d949058} 2023-10-18
 - Add getNamespace method to key type and value type of maps
diff --git a/packages/concerto-core/lib/introspect/stringvalidator.js b/packages/concerto-core/lib/introspect/stringvalidator.js
index 290b725ca0..b3c6db8a39 100644
--- a/packages/concerto-core/lib/introspect/stringvalidator.js
+++ b/packages/concerto-core/lib/introspect/stringvalidator.js
@@ -14,6 +14,7 @@
 
 'use strict';
 
+const { ErrorCodes } = require('@accordproject/concerto-util');
 const { isNull } = require('../util');
 const Validator = require('./validator');
 
@@ -70,7 +71,7 @@ class StringValidator extends Validator{
                 this.regex = new CustomRegExp(validator.pattern, validator.flags);
             }
             catch(exception) {
-                this.reportError(field.getName(), exception.message);
+                this.reportError(field.getName(), exception.message, ErrorCodes.REGEX_VALIDATOR_EXCEPTION);
             }
         }
     }
diff --git a/packages/concerto-core/lib/introspect/validator.js b/packages/concerto-core/lib/introspect/validator.js
index 9bf0b0ac07..3f790e6f36 100644
--- a/packages/concerto-core/lib/introspect/validator.js
+++ b/packages/concerto-core/lib/introspect/validator.js
@@ -14,6 +14,7 @@
 
 'use strict';
 
+const { BaseException, ErrorCodes } = require('@accordproject/concerto-util');
 // Types needed for TypeScript generation.
 /* eslint-disable no-unused-vars */
 /* istanbul ignore next */
@@ -46,10 +47,11 @@ class Validator {
     /**
      * @param {string} id the identifier of the instance
      * @param {string} msg the exception message
+     * @param {string} errorType the type of error
      * @throws {Error} throws an error to report the message
      */
-    reportError(id, msg) {
-        throw new Error( 'Validator error for field `' + id + '`. ' + this.getFieldOrScalarDeclaration().getFullyQualifiedName() + ': ' + msg );
+    reportError(id, msg, errorType=ErrorCodes.DEFAULT_VALIDATOR_EXCEPTION) {
+        throw new BaseException('Validator error for field `' + id + '`. ' + this.getFieldOrScalarDeclaration().getFullyQualifiedName() + ': ' + msg, undefined, errorType);
     }
 
     /**
diff --git a/packages/concerto-core/lib/typenotfoundexception.js b/packages/concerto-core/lib/typenotfoundexception.js
index d478182abd..29f21de097 100644
--- a/packages/concerto-core/lib/typenotfoundexception.js
+++ b/packages/concerto-core/lib/typenotfoundexception.js
@@ -14,7 +14,7 @@
 
 'use strict';
 
-const { BaseException } = require('@accordproject/concerto-util');
+const { BaseException, ErrorCodes } = require('@accordproject/concerto-util');
 const Globalize = require('./globalize');
 
 /**
@@ -31,8 +31,9 @@ class TypeNotFoundException extends BaseException {
      * @param {string} typeName - fully qualified type name.
      * @param {string|undefined} message - error message.
      * @param {string} component - the optional component which throws this error
+     * @param {string} errorType - the error code related to the error
      */
-    constructor(typeName, message, component) {
+    constructor(typeName, message, component, errorType = ErrorCodes.TYPE_NOT_FOUND_EXCEPTION) {
         if (!message) {
             const formatter = Globalize.messageFormatter('typenotfounderror-defaultmessage');
             message = formatter({
@@ -40,7 +41,7 @@ class TypeNotFoundException extends BaseException {
             });
         }
 
-        super(message, component);
+        super(message, component, errorType);
         this.typeName = typeName;
     }
 
diff --git a/packages/concerto-core/types/lib/introspect/validator.d.ts b/packages/concerto-core/types/lib/introspect/validator.d.ts
index 077536b5be..b7627d9da1 100644
--- a/packages/concerto-core/types/lib/introspect/validator.d.ts
+++ b/packages/concerto-core/types/lib/introspect/validator.d.ts
@@ -20,9 +20,10 @@ declare class Validator {
     /**
      * @param {string} id the identifier of the instance
      * @param {string} msg the exception message
+     * @param {string} errorType the type of error
      * @throws {Error} throws an error to report the message
      */
-    reportError(id: string, msg: string): void;
+    reportError(id: string, msg: string, errorType?: string): void;
     /**
      * Visitor design pattern
      * @param {Object} visitor - the visitor
diff --git a/packages/concerto-core/types/lib/serializer/validationexception.d.ts b/packages/concerto-core/types/lib/serializer/validationexception.d.ts
index ef5846bbe9..8978052036 100644
--- a/packages/concerto-core/types/lib/serializer/validationexception.d.ts
+++ b/packages/concerto-core/types/lib/serializer/validationexception.d.ts
@@ -8,6 +8,12 @@ export = ValidationException;
  * @private
  */
 declare class ValidationException extends BaseException {
+    /**
+     * Create a ValidationException
+     * @param {string} message - the message for the exception
+     * @param {string} component - the optional component which throws this error
+     */
+    constructor(message: string, component: string);
 }
 import BaseException_1 = require("@accordproject/concerto-util/types/lib/baseexception");
 import BaseException = BaseException_1.BaseException;
diff --git a/packages/concerto-core/types/lib/typenotfoundexception.d.ts b/packages/concerto-core/types/lib/typenotfoundexception.d.ts
index 231c679315..b5af576b50 100644
--- a/packages/concerto-core/types/lib/typenotfoundexception.d.ts
+++ b/packages/concerto-core/types/lib/typenotfoundexception.d.ts
@@ -13,8 +13,9 @@ declare class TypeNotFoundException extends BaseException {
      * @param {string} typeName - fully qualified type name.
      * @param {string|undefined} message - error message.
      * @param {string} component - the optional component which throws this error
+     * @param {string} errorType - the error code related to the error
      */
-    constructor(typeName: string, message: string | undefined, component: string);
+    constructor(typeName: string, message: string | undefined, component: string, errorType?: string);
     typeName: string;
     /**
      * Get the name of the type that was not found.
diff --git a/packages/concerto-util/index.js b/packages/concerto-util/index.js
index 02fb6192f9..65862da031 100644
--- a/packages/concerto-util/index.js
+++ b/packages/concerto-util/index.js
@@ -52,6 +52,9 @@ const Label = require('./lib/label');
 // Identifiers
 const Identifiers = require('./lib/identifiers');
 
+//errorcodes
+const ErrorCodes = require('./lib/errorcodes');
+
 module.exports = {
     BaseException,
     BaseFileException,
@@ -67,5 +70,6 @@ module.exports = {
     Logger,
     TypedStack,
     Label,
-    Identifiers
+    Identifiers,
+    ErrorCodes
 };
diff --git a/packages/concerto-util/lib/baseexception.js b/packages/concerto-util/lib/baseexception.js
index 896f0759c8..bd967c1dad 100644
--- a/packages/concerto-util/lib/baseexception.js
+++ b/packages/concerto-util/lib/baseexception.js
@@ -14,7 +14,10 @@
 
 'use strict';
 
+
+
 const packageJson = require('../package.json');
+const ErrorCodes  = require('./errorcodes');
 
 /**
 * A base class for all Concerto exceptions
@@ -27,12 +30,14 @@ class BaseException extends Error {
      * Create the BaseException.
      * @param {string} message - The exception message.
      * @param {string} component - The optional component which throws this error.
+     * @param {string} errorType - The optional error code regarding the error
      */
-    constructor(message, component) {
+    constructor(message, component, errorType) {
         super(message);
         this.component = component || packageJson.name;
         this.name = this.constructor.name;
         this.message = message;
+        this.errorType = errorType || ErrorCodes.DEFAULT_BASE_EXCEPTION;
         if (typeof Error.captureStackTrace === 'function') {
             Error.captureStackTrace(this, this.constructor);
         }
diff --git a/packages/concerto-util/lib/errorcodes.js b/packages/concerto-util/lib/errorcodes.js
new file mode 100644
index 0000000000..3f6ec0628b
--- /dev/null
+++ b/packages/concerto-util/lib/errorcodes.js
@@ -0,0 +1,26 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+//default base exception
+const DEFAULT_BASE_EXCEPTION = 'DefaultBaseException';
+//default validator exception which is being used when there is no specified validator exception in introspect
+const DEFAULT_VALIDATOR_EXCEPTION = 'DefaultValidatorException';
+// exception code for regex validator format error
+const REGEX_VALIDATOR_EXCEPTION = 'RegexValidatorException';
+// base exception for Type not found
+const TYPE_NOT_FOUND_EXCEPTION = 'TypeNotFoundException';
+
+module.exports = {DEFAULT_BASE_EXCEPTION, DEFAULT_VALIDATOR_EXCEPTION, REGEX_VALIDATOR_EXCEPTION, TYPE_NOT_FOUND_EXCEPTION};
\ No newline at end of file
diff --git a/packages/concerto-util/types/index.d.ts b/packages/concerto-util/types/index.d.ts
index 3d3d7a0248..e87904ac9a 100644
--- a/packages/concerto-util/types/index.d.ts
+++ b/packages/concerto-util/types/index.d.ts
@@ -13,4 +13,5 @@ import Logger = require("./lib/logger");
 import TypedStack = require("./lib/typedstack");
 import Label = require("./lib/label");
 import Identifiers = require("./lib/identifiers");
-export { BaseException, BaseFileException, FileDownloader, CompositeFileLoader, DefaultFileLoader, GitHubFileLoader, HTTPFileLoader, Writer, FileWriter, InMemoryWriter, ModelWriter, Logger, TypedStack, Label, Identifiers };
+import ErrorCodes = require("./lib/errorcodes");
+export { BaseException, BaseFileException, FileDownloader, CompositeFileLoader, DefaultFileLoader, GitHubFileLoader, HTTPFileLoader, Writer, FileWriter, InMemoryWriter, ModelWriter, Logger, TypedStack, Label, Identifiers, ErrorCodes };
diff --git a/packages/concerto-util/types/lib/baseexception.d.ts b/packages/concerto-util/types/lib/baseexception.d.ts
index bdc321df80..f6f5cadd8d 100644
--- a/packages/concerto-util/types/lib/baseexception.d.ts
+++ b/packages/concerto-util/types/lib/baseexception.d.ts
@@ -10,7 +10,9 @@ declare class BaseException extends Error {
      * Create the BaseException.
      * @param {string} message - The exception message.
      * @param {string} component - The optional component which throws this error.
+     * @param {string} errorType - The optional error code regarding the error
      */
-    constructor(message: string, component: string);
+    constructor(message: string, component: string, errorType: string);
     component: any;
+    errorType: string;
 }
diff --git a/packages/concerto-util/types/lib/errorcodes.d.ts b/packages/concerto-util/types/lib/errorcodes.d.ts
new file mode 100644
index 0000000000..5bdae05915
--- /dev/null
+++ b/packages/concerto-util/types/lib/errorcodes.d.ts
@@ -0,0 +1,4 @@
+export const DEFAULT_BASE_EXCEPTION: "DefaultBaseException";
+export const DEFAULT_VALIDATOR_EXCEPTION: "DefaultValidatorException";
+export const REGEX_VALIDATOR_EXCEPTION: "RegexValidatorException";
+export const TYPE_NOT_FOUND_EXCEPTION: "TypeNotFoundException";