diff --git a/back/app/entity/models.py b/back/app/entity/models.py
index c5f3c0c7..8ac90301 100644
--- a/back/app/entity/models.py
+++ b/back/app/entity/models.py
@@ -1,8 +1,9 @@
 from enum import Enum
-from datetime import datetime
-from pydantic import Field
+from datetime import datetime, date
+from typing import List, Literal
 
-from beanie import Document
+from pydantic import Field, BaseModel
+from beanie import Document, Link
 
 
 class EntityType(str, Enum):
@@ -11,13 +12,40 @@ class EntityType(str, Enum):
     institution = 'institution'
 
 
+class Individual(BaseModel):
+    type: Literal['individual'] = 'individual'
+    firstname: str
+    middlenames: List[str] = Field(default=[])
+    lastname: str
+    surnames: List[str] = Field(default=[])
+    day_of_birth: date
+    job: str
+    employer: str
+
+
+class Employee(BaseModel):
+    entity_id: str
+    role: str
+
+
+class Corporation(BaseModel):
+    type: Literal['corporation'] = 'corporation'
+    title: str
+    activity: str
+    employees: List[Employee] = Field(default=[])
+
+
 class Entity(Document):
     _id: str
-    type: EntityType
     name: str
     address: str
+    entity_data: Individual | Corporation = Field(..., discriminator='type')
+
     created_at: datetime = Field(default=datetime.utcnow(), nullable=False)
     updated_at: datetime = Field(default_factory=datetime.utcnow, nullable=False)
-    #
-    # class Settings:
-    #     name = "entities"
+
+    class Settings:
+        bson_encoders = {
+            date: lambda dt: datetime(year=dt.year, month=dt.month, day=dt.day, hour=0, minute=0, second=0) \
+                                    if not hasattr(dt, 'hour') else dt
+        }
diff --git a/back/app/entity/schemas.py b/back/app/entity/schemas.py
index c8fbf997..645b347f 100644
--- a/back/app/entity/schemas.py
+++ b/back/app/entity/schemas.py
@@ -1,9 +1,9 @@
 import uuid
 
 from datetime import datetime
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 
-from .models import Entity, EntityType
+from .models import Entity, EntityType, Individual, Corporation
 from ..core.schemas import Writer
 
 
@@ -12,11 +12,12 @@ class EntityRead(Entity):
 
 
 class EntityCreate(Writer):
-    type: EntityType
     name: str
     address: str
+    entity_data: Individual | Corporation = Field(..., discriminator='type')
 
 
 class EntityUpdate(BaseModel):
     name: str
     address: str
+    entity_data: Individual | Corporation = Field(..., discriminator='type')
diff --git a/front/app/src/common/crud/card/card.component.html b/front/app/src/common/crud/card/card.component.html
index 1c4aea56..2f4c0a3d 100644
--- a/front/app/src/common/crud/card/card.component.html
+++ b/front/app/src/common/crud/card/card.component.html
@@ -1,11 +1,11 @@
 <div>
-  <form [formGroup]="form" (ngSubmit)="onSubmit(model)">
+  <form cForm [formGroup]="form" (ngSubmit)="onSubmit(model)">
     <span class="col col-form-label" *ngIf="loading$ | async">Loading...</span>
     <formly-form [form]="form" [fields]="fields" [model]="model"></formly-form>
-    <button color="primary"  type="submit" class="btn btn-default">
+    <button cButton color="primary">
       {{ this.isCreateForm() ? "Create" : "Update" }}
     </button>
-    <button *ngIf="!this.isCreateForm()" (click)="onDelete()" color="danger" type="" class="btn btn-default">
+    <button cButton *ngIf="!this.isCreateForm()" (click)="onDelete()" color="danger">
       Delete
     </button>
   </form>
diff --git a/front/app/src/common/crud/crud.module.ts b/front/app/src/common/crud/crud.module.ts
index 91b61043..bfa5d5fa 100644
--- a/front/app/src/common/crud/crud.module.ts
+++ b/front/app/src/common/crud/crud.module.ts
@@ -1,8 +1,6 @@
 import { NgModule } from '@angular/core';
 import { CommonModule } from '@angular/common';
 
-//import { BrowserAnimationsModule } from "@angular/platform-browser/animations";
-
 import { HttpClientModule } from "@angular/common/http";
 
 import { FormsModule, ReactiveFormsModule} from '@angular/forms';
@@ -11,17 +9,23 @@ import { FormlyBootstrapModule } from '@ngx-formly/bootstrap';
 
 import { CardComponent } from './card/card.component';
 import { ListComponent } from './list/list.component';
-import { ObjectTypeComponent } from "./object.type";
-import {ApiService, CrudService} from "./crud.service";
-import {NgbModule} from "@ng-bootstrap/ng-bootstrap";
-import {JsonschemasService} from "./jsonschemas.service";
+import { ArrayTypeComponent } from "./types/array.type";
+import { ObjectTypeComponent } from "./types/object.type";
+import { DatetimeTypeComponent } from "./types/datetime.type";
+import { ApiService, CrudService } from "./crud.service";
+import { NgbModule} from "@ng-bootstrap/ng-bootstrap";
+import { JsonschemasService } from "./jsonschemas.service";
+import { MultiSchemaTypeComponent } from "./types/multischema.type";
 
 
 @NgModule({
   declarations: [
     CardComponent,
     ListComponent,
-    ObjectTypeComponent
+    ObjectTypeComponent,
+    DatetimeTypeComponent,
+    ArrayTypeComponent,
+    MultiSchemaTypeComponent
   ],
   providers: [ JsonschemasService, ApiService, CrudService ],
   imports: [
@@ -34,6 +38,9 @@ import {JsonschemasService} from "./jsonschemas.service";
     FormlyModule.forRoot({
       types: [
         { name: 'object', component: ObjectTypeComponent },
+        { name: 'datetime', component: DatetimeTypeComponent },
+        { name: 'array', component: ArrayTypeComponent },
+        { name: 'multischema', component: MultiSchemaTypeComponent },
       ]
     }),
     FormlyBootstrapModule
diff --git a/front/app/src/common/crud/jsonschemas.service.ts b/front/app/src/common/crud/jsonschemas.service.ts
index e9ae9c3c..e35d6021 100644
--- a/front/app/src/common/crud/jsonschemas.service.ts
+++ b/front/app/src/common/crud/jsonschemas.service.ts
@@ -32,15 +32,35 @@ export class JsonschemasService {
         for (let prop_name in resource.properties) {
             let prop = resource.properties[prop_name];
 
-            if (this.is_reference(prop)) {
-               let subresourceName = this.get_reference_name(prop);
-               resource.components.schemas[subresourceName] = this.buildResource(subresourceName);
+            if (prop_name === '_id') {
+                delete resource.properties[prop_name]
+            } else if (this.is_reference(prop)) {
+                this.resolveReference(resource, prop);
+            } else if (prop.hasOwnProperty('oneOf')) {
+                for (let i in prop.oneOf) {
+                    this.resolveReference(resource, prop.oneOf[i]);
+                }
+            } else if (prop.hasOwnProperty('items') && this.is_reference(prop.items)) {
+                this.resolveReference(resource, prop.items);
+            } else if (prop.format === 'date-time') {
+                prop.type = "datetime";
             }
         }
 
         return resource;
     }
 
+    resolveReference(resource: any, prop_reference: any) {
+        let subresourceName = this.get_reference_name(prop_reference);
+        let subresource = this.buildResource(subresourceName);
+        resource.components.schemas[subresourceName] = subresource;
+        for (let subsubresourceName in subresource.components.schemas) {
+            if (! resource.components.schemas.hasOwnProperty(subsubresourceName)) {
+                resource.components.schemas[subsubresourceName] = subresource.components.schemas[subsubresourceName];
+            }
+        }
+    }
+
     getCreateResource(resourceName: string): Observable<Schema> {
         return new Observable<Schema>((observer) => {
             this.getSchemas().subscribe(() => {
@@ -75,6 +95,10 @@ export class JsonschemasService {
         return prop.hasOwnProperty('$ref');
     }
 
+    private is_union(prop: any) {
+        return prop.hasOwnProperty('oneOf');
+    }
+
     private get_reference_name(prop: any) {
         return prop['$ref'].substring(prop['$ref'].lastIndexOf('/')+1);
     }
diff --git a/front/app/src/common/crud/types/array.type.ts b/front/app/src/common/crud/types/array.type.ts
new file mode 100644
index 00000000..5b10ac60
--- /dev/null
+++ b/front/app/src/common/crud/types/array.type.ts
@@ -0,0 +1,36 @@
+import { Component } from '@angular/core';
+import { FieldArrayType } from '@ngx-formly/core';
+
+@Component({
+  selector: 'formly-array-type',
+  template: `
+    <div class="mb-3">
+      <label *ngIf="props.label" class="form-label">{{ props.label }}</label>
+      <p *ngIf="props.description">{{ props.description }}</p>
+      <div class="d-flex flex-row-reverse">
+        <button class="btn btn-primary" type="button" (click)="add()">+</button>
+      </div>
+
+      <div class="alert alert-danger" role="alert" *ngIf="showError && formControl.errors">
+        <formly-validation-message [field]="field"></formly-validation-message>
+      </div>
+
+      <div *ngFor="let field of field.fieldGroup; let i = index" class="row align-items-start">
+        <formly-field class="col" [field]="field"></formly-field>
+        <div *ngIf="field.props!['removable'] !== false" class="col-2 text-right">
+          <button class="btn btn-danger" type="button" (click)="remove(i)">-</button>
+        </div>
+      </div>
+    </div>
+  `,
+})
+export class ArrayTypeComponent extends FieldArrayType {
+  constructor() {
+    super();
+  }
+}
+
+
+/**  Copyright 2021 Formly. All Rights Reserved.
+    Use of this source code is governed by an MIT-style license that
+    can be found in the LICENSE file at https://github.com/ngx-formly/ngx-formly/blob/main/LICENSE */
\ No newline at end of file
diff --git a/front/app/src/common/crud/types/datetime.type.ts b/front/app/src/common/crud/types/datetime.type.ts
new file mode 100644
index 00000000..b7900879
--- /dev/null
+++ b/front/app/src/common/crud/types/datetime.type.ts
@@ -0,0 +1,89 @@
+
+import { Component, ElementRef, OnInit, ViewChild} from '@angular/core';
+import { formatDate } from "@angular/common";
+import { NgbDateStruct, NgbTimeStruct } from '@ng-bootstrap/ng-bootstrap';
+import { FieldType, FieldTypeConfig } from '@ngx-formly/core';
+
+
+@Component({
+  selector: 'app-form-datepicker-type',
+  template: `
+    <label *ngIf="props.label && props['hideLabel'] !== true" [attr.for]="id"
+         class="form-label">{{ props.label }}
+        <span *ngIf="props.required && props['hideRequiredMarker'] !== true" aria-hidden="true">*</span>
+    </label>
+    <div class="input-group" *ngIf="! this.field.props.readonly">
+        <input type="text" 
+               [formControl]="formControl" 
+               [formlyAttributes]="field"
+               [class.is-invalid]="showError"
+        />
+        <input
+            class="form-control"
+            placeholder="yyyy-mm-dd"
+            name="dp"
+            [(ngModel)]="date"
+            (ngModelChange)="changeDatetime($event)"
+            ngbDatepicker
+            #d="ngbDatepicker"
+        />
+        <button class="btn btn-outline-secondary bi bi-calendar3" (click)="d.toggle()" type="button"></button>
+        <ngb-timepicker 
+                (ngModelChange)="changeDatetime($event)"
+                [(ngModel)]="time" 
+                [seconds]="true">
+        </ngb-timepicker>
+    </div>
+    <div class="input-group" *ngIf="this.field.props.readonly">
+        <input class="form-control" value="{{ this.datetime.toLocaleString() }}" disabled=""/>
+    </div>
+  `,
+})
+export class DatetimeTypeComponent extends FieldType<FieldTypeConfig> implements OnInit
+{
+    public time : NgbTimeStruct = { hour: 12, minute: 0, second: 0 }
+    public date : NgbDateStruct = { year: 2023, month: 1, day: 9 }
+    public datetime : Date = new Date()
+
+
+    constructor() {
+        super();
+    }
+
+    ngOnInit() {
+        this.formControl.valueChanges.subscribe(value => {
+            this.datetime = new Date(value)
+            this.date = this.getDateStruct(this.datetime);
+            this.time = this.getTimeStruct(this.datetime);
+        })
+    }
+
+    getDateStruct(d: Date) {
+        return {
+            year: d.getFullYear(),
+            month: d.getMonth() + 1,
+            day: d.getDate(),
+        }
+    }
+
+    getTimeStruct(d: Date) {
+        return {
+            hour: d.getHours(),
+            minute: d.getMinutes(),
+            second: d.getSeconds(),
+        }
+    }
+
+    changeDatetime(event: any) {
+        this.datetime.setFullYear(this.date.year)
+        this.datetime.setMonth(this.date.month - 1)
+        this.datetime.setDate(this.date.day)
+        this.datetime.setHours(this.time.hour)
+        this.datetime.setMinutes(this.time.minute)
+        this.datetime.setSeconds(this.time.second)
+
+        this.formControl.setValue(
+            formatDate(this.datetime, 'YYYY-MM-ddTHH:mm:ss.SSS', 'EN_US', 'CET')
+        )
+    }
+}
diff --git a/front/app/src/common/crud/types/multischema.type.ts b/front/app/src/common/crud/types/multischema.type.ts
new file mode 100644
index 00000000..7dcae663
--- /dev/null
+++ b/front/app/src/common/crud/types/multischema.type.ts
@@ -0,0 +1,38 @@
+import {Component, OnInit} from '@angular/core';
+import { FieldType } from '@ngx-formly/core';
+import {Observable} from "rxjs";
+
+@Component({
+  selector: 'formly-multi-schema-type',
+  template: `
+    <div class="card mb-3">
+      <div class="card-body">
+        <label *ngIf="props.label" class="form-label">{{ props.label }}</label>
+        <p *ngIf="props.description">{{ props.description }}</p>
+        <div class="alert alert-danger" role="alert" *ngIf="showError && formControl.errors">
+          <formly-validation-message [field]="field"></formly-validation-message>
+        </div>
+        <formly-field *ngFor="let f of field.fieldGroup" [field]="f"></formly-field>
+      </div>
+    </div>
+  `,
+})
+export class MultiSchemaTypeComponent extends FieldType implements OnInit {
+    ngOnInit() {
+        let f = this.field
+        f.fieldGroup![0].props!.options!.forEach(function (option) {
+            option.label = f.fieldGroup![1].fieldGroup![option.value].props!.label;
+            f.fieldGroup![1].fieldGroup![option.value].props!.label = "";
+        });
+
+        f.fieldGroup![1].fieldGroup!.forEach(function (field) {
+            //field.fieldGroup![0].hide = true;
+        });
+
+    }
+}
+
+
+/**  Copyright 2021 Formly. All Rights Reserved.
+    Use of this source code is governed by an MIT-style license that
+    can be found in the LICENSE file at https://github.com/ngx-formly/ngx-formly/blob/main/LICENSE */
diff --git a/front/app/src/common/crud/object.type.ts b/front/app/src/common/crud/types/object.type.ts
similarity index 100%
rename from front/app/src/common/crud/object.type.ts
rename to front/app/src/common/crud/types/object.type.ts