diff --git a/backend/src/main/resources/metadata-sources-ui-schema.json b/backend/src/main/resources/metadata-sources-ui-schema.json
index 9d64e75b4..1bf90c362 100644
--- a/backend/src/main/resources/metadata-sources-ui-schema.json
+++ b/backend/src/main/resources/metadata-sources-ui-schema.json
@@ -31,17 +31,23 @@
                 "name": {
                     "title": "label.organization-name",
                     "description": "tooltip.organization-name",
-                    "type": "string"
+                    "type": "string",
+                    "minLength": 1,
+                    "maxLength": 255
                 },
                 "displayName": {
                     "title": "label.organization-display-name",
                     "description": "tooltip.organization-display-name",
-                    "type": "string"
+                    "type": "string",
+                    "minLength": 1,
+                    "maxLength": 255
                 },
                 "url": {
                     "title": "label.organization-url",
                     "description": "tooltip.organization-url",
-                    "type": "string"
+                    "type": "string",
+                    "minLength": 1,
+                    "maxLength": 255
                 }
             },
             "dependencies": {
@@ -101,17 +107,23 @@
                 "displayName": {
                     "title": "label.display-name",
                     "description": "tooltip.mdui-display-name",
-                    "type": "string"
+                    "type": "string",
+                    "minLength": 1,
+                    "maxLength": 255
                 },
                 "informationUrl": {
                     "title": "label.information-url",
                     "description": "tooltip.mdui-information-url",
-                    "type": "string"
+                    "type": "string",
+                    "minLength": 1,
+                    "maxLength": 255
                 },
                 "privacyStatementUrl": {
                     "title": "label.privacy-statement-url",
                     "description": "tooltip.mdui-privacy-statement-url",
-                    "type": "string"
+                    "type": "string",
+                    "minLength": 1,
+                    "maxLength": 255
                 },
                 "description": {
                     "title": "label.description",
@@ -119,26 +131,28 @@
                     "type": "string",
                     "widget": {
                         "id": "textarea"
-                    }
+                    },
+                    "minLength": 1,
+                    "maxLength": 255
                 },
                 "logoUrl": {
                     "title": "label.logo-url",
                     "description": "tooltip.mdui-logo-url",
-                    "type": "string"
+                    "type": "string",
+                    "minLength": 1,
+                    "maxLength": 255
                 },
                 "logoHeight": {
                     "title": "label.logo-height",
                     "description": "tooltip.mdui-logo-height",
                     "min": 0,
-                    "type": "integer",
-                    "default": 0
+                    "type": "integer"
                 },
                 "logoWidth": {
                     "title": "label.logo-width",
                     "description": "tooltip.mdui-logo-width",
                     "min": 0,
-                    "type": "integer",
-                    "default": 0
+                    "type": "integer"
                 }
             }
         },
diff --git a/ui/src/app/shared/constant.ts b/ui/src/app/shared/constant.ts
index a6e3fde7d..a0eaf09b8 100644
--- a/ui/src/app/shared/constant.ts
+++ b/ui/src/app/shared/constant.ts
@@ -1 +1 @@
-export const DEFAULT_FIELD_MAX_LENGTH = 255;
\ No newline at end of file
+export const DEFAULT_FIELD_MAX_LENGTH = 255;
diff --git a/ui/src/app/shared/directive/input-defaults.directive.spec.ts b/ui/src/app/shared/directive/input-defaults.directive.spec.ts
deleted file mode 100644
index 172c41a3f..000000000
--- a/ui/src/app/shared/directive/input-defaults.directive.spec.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import { Component, DebugElement } from '@angular/core';
-import { By } from '@angular/platform-browser';
-import { TestBed, ComponentFixture } from '@angular/core/testing';
-import { ReactiveFormsModule, FormsModule, NgControl } from '@angular/forms';
-import { Router } from '@angular/router';
-import { NoopAnimationsModule } from '@angular/platform-browser/animations';
-import { RouterStub } from '../../../testing/router.stub';
-import { NgbModalStub } from '../../../testing/modal.stub';
-import { InputDefaultsDirective } from './input-defaults.directive';
-
-import * as constants from '../../shared/constant';
-
-@Component({
-    template: `<input type="text" class="form-control" [disableDefaults]="disableDefaults">`
-})
-class TestComponent {
-    isDisabled = false;
-    set disableDefaults(isDisabled: boolean) {
-        this.isDisabled = isDisabled;
-    }
-    get disableDefaults(): boolean {
-        return this.isDisabled;
-    }
-}
-
-describe('Input Defaults Directive', () => {
-    let component: TestComponent;
-    let fixture: ComponentFixture<TestComponent>;
-    let inputEl: DebugElement;
-
-    beforeEach(() => {
-        TestBed.configureTestingModule({
-            providers: [],
-            imports: [
-                FormsModule,
-                ReactiveFormsModule
-            ],
-            declarations: [
-                InputDefaultsDirective,
-                TestComponent
-            ],
-        });
-
-        fixture = TestBed.createComponent(TestComponent);
-        inputEl = fixture.debugElement.query(By.css('input'));
-    });
-
-    describe('attributes', () => {
-        it('should add a maxlength attribute based on the constants file', () => {
-            fixture.detectChanges();
-            expect(parseInt(inputEl.attributes.maxlength, 10)).toEqual(constants.DEFAULT_FIELD_MAX_LENGTH);
-        });
-
-        it('should be null if disableDefaults is set', () => {
-            fixture.componentInstance.disableDefaults = true;
-            fixture.detectChanges();
-            expect(inputEl.attributes.maxlength).toBeNull();
-        });
-    });
-});
diff --git a/ui/src/app/shared/directive/input-defaults.directive.ts b/ui/src/app/shared/directive/input-defaults.directive.ts
deleted file mode 100644
index 409d02ea8..000000000
--- a/ui/src/app/shared/directive/input-defaults.directive.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import { Directive, Self, HostBinding, Input } from '@angular/core';
-import * as constants from '../../shared/constant';
-
-@Directive({
-    selector: 'input[type="text"].form-control,textarea.form-control'
-})
-export class InputDefaultsDirective {
-    public constructor() { }
-
-    @Input() disableDefaults = false;
-
-    @HostBinding('attr.maxlength')
-    get maxlength() {
-        return this.disableDefaults ? null : constants.DEFAULT_FIELD_MAX_LENGTH;
-    }
-}
diff --git a/ui/src/app/shared/shared.module.ts b/ui/src/app/shared/shared.module.ts
index 75dd7911c..720f2a407 100644
--- a/ui/src/app/shared/shared.module.ts
+++ b/ui/src/app/shared/shared.module.ts
@@ -4,7 +4,6 @@ import { FormsModule, ReactiveFormsModule } from '@angular/forms';
 import { HighlightPipe } from './pipe/highlight.pipe';
 import { AutoCompleteComponent } from './autocomplete/autocomplete.component';
 import { ValidationClassDirective } from './validation/validation-class.directive';
-import { InputDefaultsDirective } from './directive/input-defaults.directive';
 import { ValidFormIconComponent } from './component/valid-form-icon.component';
 import { PrettyXml } from './pipe/pretty-xml.pipe';
 import { ToggleSwitchComponent } from './switch/switch.component';
@@ -27,7 +26,6 @@ import { NgbPopoverModule } from '@ng-bootstrap/ng-bootstrap';
         AutoCompleteComponent,
         ToggleSwitchComponent,
         ValidationClassDirective,
-        InputDefaultsDirective,
         ValidFormIconComponent,
         PrettyXml,
         CustomDatePipe,
@@ -41,7 +39,6 @@ import { NgbPopoverModule } from '@ng-bootstrap/ng-bootstrap';
         CommonModule,
         ReactiveFormsModule,
         FormsModule,
-        InputDefaultsDirective,
         ValidFormIconComponent,
         ValidationClassDirective,
         ContenteditableDirective,