Split DTO and Angular model class

frontend/src/shared/models/FpbElement.ts

@@ -0,0 +1,14 @@
+import { FpbElementDTO } from "@shared/models/fpb/FpbElementDTO";
+import { RdfElement } from "@shared/models/RdfElement";
+import { Property } from "./Property";
+
+export class FpbElement extends RdfElement {
+    type: string;
+    properties = new Array<Property>();
+
+    constructor(elementDto: FpbElementDTO) {
+        super(elementDto.iri);
+        this.type = elementDto.type;
+        this.properties = elementDto.propertyDtos?.map(propDto => new Property(propDto));
+    }
+}

shared/models/fpb/FpbElementDTO.ts

@@ -0,0 +1,8 @@
+import { PropertyDTO } from "../properties/PropertyDTO";
+
+export class FpbElementDTO {
+    iri: string;
+    type: string;
+    propertyDtos: Array<PropertyDTO>
+}
+