diff --git a/concept.events.ts b/concept.events.ts
new file mode 100644
index 0000000..1094691
--- /dev/null
+++ b/concept.events.ts
@@ -0,0 +1,30 @@
+import { ConceptResponseDTO } from './dto/conceptresponse.dto';
+
+export class ConceptCreateEvent {
+  type = 'create';
+  constructor(public concept: ConceptResponseDTO) {
+    this.concept = new ConceptResponseDTO(concept);
+  }
+}
+
+export class ConceptEditEvent {
+  type = 'edit';
+  constructor(public concept: ConceptResponseDTO) {
+    this.concept = new ConceptResponseDTO(concept);
+  }
+}
+
+export class ConceptDeleteEvent {
+  type = 'delete';
+  constructor(public id: number) {}
+}
+
+export class ConceptEnableEvent {
+  type = 'enable';
+  constructor(public id: number) {}
+}
+
+export class ConceptDisableEvent {
+  type = 'disable';
+  constructor(public id: number) {}
+}