diff --git a/extension.schema.json b/extension.schema.json
new file mode 100644
index 000000000..7989236ba
--- /dev/null
+++ b/extension.schema.json
@@ -0,0 +1,300 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "$id": "https://github.com/Alfresco/alfresco-content-app/blob/development/extension.schema.json",
+    "title": "ACA Extension Schema",
+    "description": "Provides a validation schema for ACA extensions",
+
+    "definitions": {
+        "ruleRef": {
+            "type": "object",
+            "required": ["id", "type"],
+            "properties": {
+                "id": {
+                    "description": "Unique rule definition id",
+                    "type": "string"
+                },
+                "type": {
+                    "description": "Rule evaluator type",
+                    "type": "string"
+                },
+                "parameters": {
+                    "description": "Rule evaluator parameters",
+                    "type": "array",
+                    "items": { "$ref": "#/definitions/ruleParameter" },
+                    "minItems": 1
+                }
+            }
+        },
+        "ruleParameter": {
+            "type": "object",
+            "required": ["type", "value"],
+            "properties": {
+                "type": {
+                    "description": "Rule parameter type",
+                    "type": "string"
+                },
+                "value": {
+                    "description": "Rule parameter value",
+                    "type": "string"
+                }
+            }
+        },
+        "routeRef": {
+            "type": "object",
+            "required": ["id", "path", "component"],
+            "properties": {
+                "id": {
+                    "description": "Unique route reference identifier.",
+                    "type": "string"
+                },
+                "path": {
+                    "description": "Route path to register.",
+                    "type": "string"
+                },
+                "component": {
+                    "description": "Unique identifier for the Component to use with the route.",
+                    "type": "string"
+                },
+                "layout": {
+                    "description": "Unique identifier for the custom layout component to use.",
+                    "type": "string"
+                },
+                "auth": {
+                    "description": "List of the authentication guards to use with the route.",
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    },
+                    "minLength": 1,
+                    "uniqueItems": true
+                },
+                "data": {
+                    "description": "Custom data to pass to the activated route so that your components can access it",
+                    "type": "object"
+                }
+            }
+        },
+        "actionRef": {
+            "type": "object",
+            "required": ["id", "type"],
+            "properties": {
+                "id": {
+                    "description": "Unique action identifier",
+                    "type": "string"
+                },
+                "type": {
+                    "description": "Action type",
+                    "type": "string"
+                },
+                "payload": {
+                    "description": "Action payload value (string or expression)",
+                    "type": "string"
+                }
+            }
+        },
+        "contentActionRef": {
+            "type": "object",
+            "required": ["id", "type"],
+            "properties": {
+                "id": {
+                    "description": "Unique action identifier.",
+                    "type": "string"
+                },
+                "type": {
+                    "description": "Element type",
+                    "type": "string",
+                    "enum": ["default", "button", "separator", "menu"]
+                },
+                "title": {
+                    "description": "Element title",
+                    "type": "string"
+                },
+                "order": {
+                    "description": "Element order",
+                    "type": "number"
+                },
+                "icon": {
+                    "description": "Element icon",
+                    "type": "string"
+                },
+                "disabled": {
+                    "description": "Toggles disabled state",
+                    "type": "boolean"
+                },
+                "children": {
+                    "description": "Child entries for the container types.",
+                    "type": "array",
+                    "items": { "$ref": "#/definitions/contentActionRef" },
+                    "minItems": 1
+                },
+                "actions": {
+                    "description": "Element actions",
+                    "type": "object",
+                    "properties": {
+                        "click": {
+                            "description": "Action reference for the click handler",
+                            "type": "string"
+                        }
+                    }
+                },
+                "rules": {
+                    "description": "Element rules",
+                    "type": "object",
+                    "properties": {
+                        "enabled": {
+                            "description": "Rule to evaluate the enabled state",
+                            "type": "string"
+                        },
+                        "visible": {
+                            "description": "Rule to evaluate the visibility state",
+                            "type": "string"
+                        }
+                    }
+                }
+            }
+        },
+        "navBarLinkRef": {
+            "type": "object",
+            "required": ["id", "icon", "title", "route"],
+            "properties": {
+                "id": {
+                    "description": "Unique identifier",
+                    "type": "string"
+                },
+                "icon": {
+                    "description": "Element icon",
+                    "type": "string"
+                },
+                "title": {
+                    "description": "Element title",
+                    "type": "string"
+                },
+                "route": {
+                    "description": "Route reference identifier",
+                    "type": "string"
+                },
+                "description": {
+                    "description": "Element description or tooltip",
+                    "type": "string"
+                },
+                "order": {
+                    "description": "Element order",
+                    "type": "number"
+                },
+                "disabled": {
+                    "description": "Toggles the disabled state",
+                    "type": "boolean"
+                }
+            }
+        },
+        "navBarGroupRef": {
+            "type": "object",
+            "required": ["id", "items"],
+            "properties": {
+                "id": {
+                    "description": "Unique identifier for the navigation group",
+                    "type": "string"
+                },
+                "items": {
+                    "description": "Navigation group items",
+                    "type": "array",
+                    "items": { "$ref": "#/definitions/navBarLinkRef" },
+                    "minItems": 1
+                },
+                "order": {
+                    "description": "Group order",
+                    "type": "number"
+                },
+                "disabled": {
+                    "description": "Toggles the disabled state",
+                    "type": "boolean"
+                }
+            }
+        }
+    },
+
+    "type": "object",
+    "required": ["name", "version"],
+    "properties": {
+        "name": {
+            "description": "Extension name",
+            "type": "string"
+        },
+        "version": {
+            "description": "Extension version",
+            "type": "string"
+        },
+        "description": {
+            "description": "Brief description on what the extension does"
+        },
+        "references": {
+            "description": "References to external files",
+            "type": "array",
+            "items": {
+                "type": "string"
+            },
+            "minItems": 1,
+            "uniqueItems": true
+        },
+        "rules": {
+            "description": "List of rule definitions",
+            "type": "array",
+            "items": { "$ref": "#/definitions/ruleRef" },
+            "minItems": 1
+        },
+        "routes": {
+            "description": "List of custom application routes",
+            "type": "array",
+            "items": { "$ref": "#/definitions/routeRef" },
+            "minItems": 1
+        },
+        "actions": {
+            "description": "List of action definitions",
+            "type": "array",
+            "items": { "$ref": "#/definitions/actionRef" },
+            "minItems": 1
+        },
+        "features": {
+            "description": "Application-specific features and extensions",
+            "type": "object",
+            "properties": {
+                "create": {
+                    "description": "The [New] menu component extensions",
+                    "type": "array",
+                    "items": { "$ref": "#/definitions/contentActionRef" },
+                    "minItems": 1
+                },
+                "viewer": {
+                    "description": "Viewer component extensions",
+                    "type": "object",
+                    "properties": {
+                        "openWith": {
+                            "description": "The [Open With] menu extensions",
+                            "type": "array",
+                            "items": { "$ref": "#/definitions/contentActionRef" },
+                            "minItems": 1
+                        }
+                    }
+                },
+                "navbar": {
+                    "description": "Navigation bar extensions",
+                    "type": "array",
+                    "items": { "$ref": "#/definitions/navBarGroupRef" },
+                    "minItems": 1
+                },
+                "content": {
+                    "description": "Main application content extensions",
+                    "type": "object",
+                    "properties": {
+                        "actions": {
+                            "description": "Content actions (toolbar, context menus, etc.)",
+                            "type": "array",
+                            "items": { "$ref": "#/definitions/contentActionRef" },
+                            "minItems": 1
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/src/app.config.json b/src/app.config.json
index bbccd407a..a7f3707d2 100644
--- a/src/app.config.json
+++ b/src/app.config.json
@@ -36,275 +36,6 @@
         "preserveState": true,
         "expandedSidenav": true
     },
-    "extensions": {
-        "external": [
-            "plugin1.json",
-            "plugin2.json"
-        ],
-        "core": {
-            "rules": [
-                {
-                    "id": "app.create.canCreateFolder",
-                    "type": "app.navigation.folder.canCreate"
-                },
-                {
-                    "id": "app.toolbar.canEditFolder",
-                    "type": "core.every",
-                    "parameters": [
-                        { "type": "rule", "value": "app.selection.folder" },
-                        { "type": "rule", "value": "app.selection.folder.canUpdate" }
-                    ]
-                },
-                {
-                    "id": "app.toolbar.canViewFile",
-                    "type": "app.selection.file"
-                },
-                {
-                    "id": "app.toolbar.canDownload",
-                    "type": "app.selection.canDownload"
-                }
-            ],
-            "routes": [
-                {
-                    "id": "aca:routes/about",
-                    "path": "ext/about",
-                    "component": "aca:components/about",
-                    "layout": "aca:layouts/main",
-                    "auth":[ "aca:auth" ],
-                    "data": {
-                        "title": "Custom About"
-                    }
-                }
-            ],
-            "actions": [
-                {
-                    "id": "aca:actions/create-folder",
-                    "type": "CREATE_FOLDER",
-                    "payload": null
-                },
-                {
-                    "id": "aca:actions/edit-folder",
-                    "type": "EDIT_FOLDER",
-                    "payload": null
-                },
-                {
-                    "id": "aca:actions/download",
-                    "type": "DOWNLOAD_NODES",
-                    "payload": null
-                },
-                {
-                    "id": "aca:actions/preview",
-                    "type": "VIEW_FILE",
-                    "payload": null
-                },
-
-                {
-                    "id": "aca:actions/info",
-                    "type": "SNACKBAR_INFO",
-                    "payload": "I'm a nice little popup raised by extension."
-                },
-                {
-                    "id": "aca:actions/node-name",
-                    "type": "SNACKBAR_INFO",
-                    "payload": "$('Action for ' + context.selection.first.entry.name)"
-                },
-                {
-                    "id": "aca:actions/settings",
-                    "type": "NAVIGATE_URL",
-                    "payload": "/settings"
-                }
-            ],
-            "features": {
-                "create": [
-                    {
-                        "id": "app.create.folder",
-                        "icon": "create_new_folder",
-                        "title": "ext: Create Folder",
-                        "actions": {
-                            "click": "aca:actions/create-folder"
-                        },
-                        "rules": {
-                            "enabled": "app.create.canCreateFolder"
-                        }
-                    }
-                ],
-                "navigation": {
-                    "aca:main": [
-                        {
-                            "id": "aca/personal-files",
-                            "order": 100,
-                            "icon": "folder",
-                            "title": "APP.BROWSE.PERSONAL.SIDENAV_LINK.LABEL",
-                            "description": "APP.BROWSE.PERSONAL.SIDENAV_LINK.TOOLTIP",
-                            "route": "personal-files"
-                        },
-                        {
-                            "id": "aca/libraries",
-                            "order": 101,
-                            "icon": "group_work",
-                            "title": "APP.BROWSE.LIBRARIES.SIDENAV_LINK.LABEL",
-                            "description": "APP.BROWSE.LIBRARIES.SIDENAV_LINK.TOOLTIP",
-                            "route": "libraries"
-                        }
-                    ],
-                    "aca:secondary": [
-                        {
-                            "id": "aca/shared",
-                            "order": 100,
-                            "icon": "people",
-                            "title": "APP.BROWSE.SHARED.SIDENAV_LINK.LABEL",
-                            "description": "APP.BROWSE.SHARED.SIDENAV_LINK.TOOLTIP",
-                            "route": "shared"
-                        },
-                        {
-                            "id": "aca/recent-files",
-                            "order": 101,
-                            "icon": "schedule",
-                            "title": "APP.BROWSE.RECENT.SIDENAV_LINK.LABEL",
-                            "description": "APP.BROWSE.RECENT.SIDENAV_LINK.TOOLTIP",
-                            "route": "recent-files"
-                        },
-                        {
-                            "id": "aca/favorites",
-                            "order": 102,
-                            "icon": "star",
-                            "title": "APP.BROWSE.FAVORITES.SIDENAV_LINK.LABEL",
-                            "description": "APP.BROWSE.FAVORITES.SIDENAV_LINK.TOOLTIP",
-                            "route": "favorites"
-                        },
-                        {
-                            "id": "aca/trashcan",
-                            "order": 103,
-                            "icon": "delete",
-                            "title": "APP.BROWSE.TRASHCAN.SIDENAV_LINK.LABEL",
-                            "description": "APP.BROWSE.TRASHCAN.SIDENAV_LINK.TOOLTIP",
-                            "route": "trashcan"
-                        }
-                    ],
-                    "aca:demo": [
-                        {
-                            "disabled": true,
-                            "id": "aca:demo/link1",
-                            "order": 100,
-                            "icon": "build",
-                            "title": "About (native)",
-                            "description": "Uses native application route",
-                            "route": "about"
-                        },
-                        {
-                            "disabled": true,
-                            "id": "aca:demo/link2",
-                            "order": 100,
-                            "icon": "build",
-                            "title": "About (custom)",
-                            "description": "Uses custom defined route",
-                            "route": "aca:routes/about"
-                        }
-                    ]
-                },
-                "viewer": {
-                    "open-with": [
-                        {
-                            "disabled": false,
-                            "id": "aca:viewer/action1",
-                            "order": 100,
-                            "icon": "build",
-                            "title": "Snackbar",
-                            "action": "aca:actions/info"
-                        }
-                    ]
-                },
-                "content": {
-                    "actions": [
-                        {
-                            "id": "aca:toolbar/separator-1",
-                            "order": 5,
-                            "type": "separator"
-                        },
-                        {
-                            "id": "aca:toolbar/create-folder",
-                            "type": "button",
-                            "order": 10,
-                            "title": "APP.NEW_MENU.TOOLTIPS.CREATE_FOLDER",
-                            "icon": "create_new_folder",
-                            "actions": {
-                                "click": "aca:actions/create-folder"
-                            },
-                            "rules": {
-                                "visible": "app.create.canCreateFolder"
-                            }
-                        },
-                        {
-                            "id": "aca:toolbar/preview",
-                            "type": "button",
-                            "order": 15,
-                            "title": "APP.ACTIONS.VIEW",
-                            "icon": "open_in_browser",
-                            "actions": {
-                                "click": "aca:actions/preview"
-                            },
-                            "rules": {
-                                "visible": "app.toolbar.canViewFile"
-                            }
-                        },
-                        {
-                            "id": "aca:toolbar/download",
-                            "type": "button",
-                            "order": 20,
-                            "title": "APP.ACTIONS.DOWNLOAD",
-                            "icon": "get_app",
-                            "actions": {
-                                "click": "aca:actions/download"
-                            },
-                            "rules": {
-                                "visible": "app.toolbar.canDownload"
-                            }
-                        },
-                        {
-                            "id": "aca:toolbar/edit-folder",
-                            "type": "button",
-                            "order": 30,
-                            "title": "APP.ACTIONS.EDIT",
-                            "icon": "create",
-                            "actions": {
-                                "click": "aca:actions/edit-folder"
-                            },
-                            "rules": {
-                                "visible": "app.toolbar.canEditFolder"
-                            }
-                        },
-
-                        {
-                            "id": "aca:toolbar/separator-2",
-                            "order": 200,
-                            "type": "separator"
-                        },
-                        {
-                            "id": "aca:toolbar/menu-1",
-                            "type": "menu",
-                            "icon": "storage",
-                            "order": 300,
-                            "children": [
-                                {
-                                    "id": "aca:action3",
-                                    "type": "button",
-                                    "title": "Settings",
-                                    "icon": "settings_applications",
-                                    "actions": {
-                                        "click": "aca:actions/settings"
-                                    }
-                                }
-                            ]
-                        },
-                        {
-                            "id": "aca:toolbar/separator-3",
-                            "type": "separator"
-                        }
-                    ]
-                }
-            }
-        }
-    },
     "languages": [
         {
             "key": "de",
@@ -460,6 +191,7 @@
             { "field": "modifier", "mincount": 1, "label": "SEARCH.FACET_FIELDS.MODIFIER" },
             { "field": "SITE", "mincount": 1, "label": "SEARCH.FACET_FIELDS.FILE_LIBRARY" }
         ],
+        "facetQueries": {},
         "categories": [
             {
                 "id": "modifiedDate",
diff --git a/src/app/app.component.ts b/src/app/app.component.ts
index 963f6ce14..30a1c2292 100644
--- a/src/app/app.component.ts
+++ b/src/app/app.component.ts
@@ -91,8 +91,6 @@ export class AppComponent implements OnInit {
                 pageTitle.setTitle(data.title || '');
             });
 
-        this.extensions.init();
-
         this.router.config.unshift(...this.extensions.getApplicationRoutes());
 
         this.uploadService.fileUploadError.subscribe(error =>
diff --git a/src/app/app.module.ts b/src/app/app.module.ts
index e418f6c77..49cdd7502 100644
--- a/src/app/app.module.ts
+++ b/src/app/app.module.ts
@@ -24,7 +24,7 @@
  */
 
 import { BrowserModule } from '@angular/platform-browser';
-import { NgModule } from '@angular/core';
+import { NgModule, APP_INITIALIZER } from '@angular/core';
 import { RouterModule, RouteReuseStrategy } from '@angular/router';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 import { FormsModule, ReactiveFormsModule } from '@angular/forms';
@@ -84,7 +84,11 @@ import { NodePermissionsDialogComponent } from './dialogs/node-permissions/node-
 import { NodePermissionsDirective } from './directives/node-permissions.directive';
 import { PermissionsManagerComponent } from './components/permission-manager/permissions-manager.component';
 import { AppRouteReuseStrategy } from './app.routes.strategy';
+import { ExtensionService } from './extensions/extension.service';
 
+export function setupExtensionServiceFactory(service: ExtensionService): Function {
+    return () => service.load();
+}
 @NgModule({
     imports: [
         BrowserModule,
@@ -96,7 +100,7 @@ import { AppRouteReuseStrategy } from './app.routes.strategy';
             enableTracing: false // enable for debug only
         }),
         MaterialModule,
-        CoreModule,
+        CoreModule.forRoot(),
         ContentModule,
         AppStoreModule,
         CoreExtensionsModule,
@@ -159,7 +163,13 @@ import { AppRouteReuseStrategy } from './app.routes.strategy';
         NodePermissionService,
         ProfileResolver,
         ExperimentalGuard,
-        ContentApiService
+        ContentApiService,
+        {
+            provide: APP_INITIALIZER,
+            useFactory: setupExtensionServiceFactory,
+            deps: [ExtensionService],
+            multi: true
+        }
     ],
     entryComponents: [
         LibraryDialogComponent,
diff --git a/src/app/components/page.component.ts b/src/app/components/page.component.ts
index c70c169d6..ac20b941d 100644
--- a/src/app/components/page.component.ts
+++ b/src/app/components/page.component.ts
@@ -36,8 +36,8 @@ import { AppStore } from '../store/states/app.state';
 import { SelectionState } from '../store/states/selection.state';
 import { Observable } from 'rxjs/Rx';
 import { ExtensionService } from '../extensions/extension.service';
-import { ContentActionExtension } from '../extensions/content-action.extension';
 import { ContentManagementService } from '../services/content-management.service';
+import { ContentActionRef } from '../extensions/action.extensions';
 
 export abstract class PageComponent implements OnInit, OnDestroy {
 
@@ -52,7 +52,7 @@ export abstract class PageComponent implements OnInit, OnDestroy {
     selection: SelectionState;
     displayMode = DisplayMode.List;
     sharedPreviewUrl$: Observable<string>;
-    actions: Array<ContentActionExtension> = [];
+    actions: Array<ContentActionRef> = [];
     canUpdateFile = false;
     canUpdateNode = false;
     canDelete = false;
diff --git a/src/app/components/preview/preview.component.html b/src/app/components/preview/preview.component.html
index 8dd91b2dc..4497904a1 100644
--- a/src/app/components/preview/preview.component.html
+++ b/src/app/components/preview/preview.component.html
@@ -18,7 +18,7 @@
         <adf-viewer-open-with *ifExperimental="'extensions'">
             <button *ngFor="let entry of openWith"
                 mat-menu-item
-                (click)="runAction(entry.action)">
+                (click)="runAction(entry.actions.click)">
                 <mat-icon>{{ entry.icon }}</mat-icon>
                 <span>{{ entry.title }}</span>
             </button>
diff --git a/src/app/components/preview/preview.component.ts b/src/app/components/preview/preview.component.ts
index eb3088476..9affe0674 100644
--- a/src/app/components/preview/preview.component.ts
+++ b/src/app/components/preview/preview.component.ts
@@ -32,8 +32,8 @@ import { DeleteNodesAction, SetSelectedNodesAction } from '../../store/actions';
 import { PageComponent } from '../page.component';
 import { ContentApiService } from '../../services/content-api.service';
 import { ExtensionService } from '../../extensions/extension.service';
-import { OpenWithExtension } from '../../extensions/open-with.extension';
 import { ContentManagementService } from '../../services/content-management.service';
+import { ContentActionRef } from '../../extensions/action.extensions';
 @Component({
     selector: 'app-preview',
     templateUrl: 'preview.component.html',
@@ -52,7 +52,7 @@ export class PreviewComponent extends PageComponent implements OnInit {
     previousNodeId: string;
     nextNodeId: string;
     navigateMultiple = false;
-    openWith: Array<OpenWithExtension> = [];
+    openWith: Array<ContentActionRef> = [];
 
     constructor(
         private contentApi: ContentApiService,
diff --git a/src/app/components/sidenav/sidenav.component.html b/src/app/components/sidenav/sidenav.component.html
index 042d0b5ba..4a190d3c4 100644
--- a/src/app/components/sidenav/sidenav.component.html
+++ b/src/app/components/sidenav/sidenav.component.html
@@ -59,13 +59,13 @@
 
     <div class="sidenav__section sidenav__section--menu" *ngFor="let group of groups">
         <ul class="sidenav-menu">
-            <li *ngFor="let item of group" class="sidenav-menu__item"
+            <li *ngFor="let item of group.items" class="sidenav-menu__item"
                 routerLinkActive
                 #rla="routerLinkActive"
                 title="{{ item.description | translate }}">
 
                 <button
-                    [routerLink]="item.route"
+                    [routerLink]="item.url"
                     [color]="rla.isActive ? 'accent': 'primary'"
                     [attr.aria-label]="item.title | translate"
                     mat-icon-button
@@ -78,7 +78,7 @@
                 </button>
 
                 <span #rippleTrigger
-                    [routerLink]="item.route"
+                    [routerLink]="item.url"
                     class="menu__item--label"
                     [hidden]="!showLabel"
                     [ngClass]="{
diff --git a/src/app/components/sidenav/sidenav.component.ts b/src/app/components/sidenav/sidenav.component.ts
index fea5fbdc4..0a9a8dd81 100644
--- a/src/app/components/sidenav/sidenav.component.ts
+++ b/src/app/components/sidenav/sidenav.component.ts
@@ -28,13 +28,13 @@ import { Component, Input, OnInit, OnDestroy } from '@angular/core';
 import { Node } from 'alfresco-js-api';
 import { NodePermissionService } from '../../services/node-permission.service';
 import { ExtensionService } from '../../extensions/extension.service';
-import { NavigationExtension } from '../../extensions/navigation.extension';
 import { Store } from '@ngrx/store';
 import { AppStore } from '../../store/states';
 import { CreateFolderAction } from '../../store/actions';
 import { currentFolder } from '../../store/selectors/app.selectors';
 import { takeUntil } from 'rxjs/operators';
-import { ContentActionExtension } from '../../extensions/content-action.extension';
+import { NavBarGroupRef } from '../../extensions/navbar.extensions';
+import { ContentActionRef } from '../../extensions/action.extensions';
 
 @Component({
     selector: 'app-sidenav',
@@ -45,8 +45,8 @@ export class SidenavComponent implements OnInit, OnDestroy {
     @Input() showLabel: boolean;
 
     node: Node = null;
-    groups: Array<NavigationExtension[]> = [];
-    createActions: Array<ContentActionExtension> = [];
+    groups: Array<NavBarGroupRef> = [];
+    createActions: Array<ContentActionRef> = [];
     canCreateContent = false;
     onDestroy$: Subject<boolean> = new Subject<boolean>();
 
@@ -64,7 +64,7 @@ export class SidenavComponent implements OnInit, OnDestroy {
             .pipe(takeUntil(this.onDestroy$))
             .subscribe(node => {
                 this.node = node;
-                this.createActions = this.extensions.getFolderCreateActions(node);
+                this.createActions = this.extensions.getCreateActions();
                 this.canCreateContent = node && this.permission.check(node, ['create']);
             });
     }
diff --git a/src/app/extensions/content-action.extension.ts b/src/app/extensions/action.extensions.ts
similarity index 88%
rename from src/app/extensions/content-action.extension.ts
rename to src/app/extensions/action.extensions.ts
index 65e805de7..d828e4967 100644
--- a/src/app/extensions/content-action.extension.ts
+++ b/src/app/extensions/action.extensions.ts
@@ -30,21 +30,28 @@ export enum ContentActionType {
     menu = 'menu'
 }
 
-export interface ContentActionExtension {
+export interface ContentActionRef {
     id: string;
     type: ContentActionType;
+
+    title?: string;
     order?: number;
-    title: string;
     icon?: string;
     disabled?: boolean;
-    children?: Array<ContentActionExtension>;
+    children?: Array<ContentActionRef>;
     actions?: {
         click?: string;
         [key: string]: string;
     };
-    rules: {
+    rules?: {
         enabled?: string;
         visible?: string;
         [key: string]: string;
     };
 }
+
+export interface ActionRef {
+    id: string;
+    type: string;
+    payload?: string;
+}
diff --git a/src/app/extensions/actions/action-ref.ts b/src/app/extensions/actions/action-ref.ts
deleted file mode 100644
index f77d166d5..000000000
--- a/src/app/extensions/actions/action-ref.ts
+++ /dev/null
@@ -1,30 +0,0 @@
-/*!
- * @license
- * Alfresco Example Content Application
- *
- * Copyright (C) 2005 - 2018 Alfresco Software Limited
- *
- * This file is part of the Alfresco Example Content Application.
- * If the software was purchased under a paid Alfresco license, the terms of
- * the paid license agreement will prevail.  Otherwise, the software is
- * provided under the following open source license terms:
- *
- * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * The Alfresco Example Content Application is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- */
-
-export interface ActionRef {
-    id: string;
-    type: string;
-    payload?: string;
-}
diff --git a/src/app/extensions/actions/action.service.spec.ts b/src/app/extensions/actions/action.service.spec.ts
deleted file mode 100644
index 75658758c..000000000
--- a/src/app/extensions/actions/action.service.spec.ts
+++ /dev/null
@@ -1,141 +0,0 @@
-/*!
- * @license
- * Alfresco Example Content Application
- *
- * Copyright (C) 2005 - 2018 Alfresco Software Limited
- *
- * This file is part of the Alfresco Example Content Application.
- * If the software was purchased under a paid Alfresco license, the terms of
- * the paid license agreement will prevail.  Otherwise, the software is
- * provided under the following open source license terms:
- *
- * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * The Alfresco Example Content Application is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- */
-
-import { AppConfigService } from '@alfresco/adf-core';
-import { ActionService } from './action.service';
-import { Store } from '@ngrx/store';
-import { AppStore } from '../../store/states';
-import { TestBed } from '@angular/core/testing';
-import { AppTestingModule } from '../../testing/app-testing.module';
-
-describe('ActionService', () => {
-    let config: AppConfigService;
-    let actions: ActionService;
-    let store: Store<AppStore>;
-
-    beforeEach(() => {
-        TestBed.configureTestingModule({
-            imports: [AppTestingModule]
-        });
-
-        actions = TestBed.get(ActionService);
-        store = TestBed.get(Store);
-
-        config = TestBed.get(AppConfigService);
-        config.config['extensions'] = {};
-    });
-
-    describe('actions', () => {
-        beforeEach(() => {
-            config.config.extensions = {
-                core: {
-                    actions: [
-                        {
-                            id: 'aca:actions/create-folder',
-                            type: 'CREATE_FOLDER',
-                            payload: 'folder-name'
-                        }
-                    ]
-                }
-            };
-        });
-
-        it('should load actions from the config', () => {
-            actions.init();
-            expect(actions.actions.length).toBe(1);
-        });
-
-        it('should have an empty action list if config provides nothing', () => {
-            config.config.extensions = {};
-            actions.init();
-
-            expect(actions.actions).toEqual([]);
-        });
-
-        it('should find action by id', () => {
-            actions.init();
-
-            const action = actions.getActionById(
-                'aca:actions/create-folder'
-            );
-            expect(action).toBeTruthy();
-            expect(action.type).toBe('CREATE_FOLDER');
-            expect(action.payload).toBe('folder-name');
-        });
-
-        it('should not find action by id', () => {
-            actions.init();
-
-            const action = actions.getActionById('missing');
-            expect(action).toBeFalsy();
-        });
-
-        it('should run the action via store', () => {
-            actions.init();
-            spyOn(store, 'dispatch').and.stub();
-
-            actions.runActionById('aca:actions/create-folder');
-            expect(store.dispatch).toHaveBeenCalledWith({
-                type: 'CREATE_FOLDER',
-                payload: 'folder-name'
-            });
-        });
-
-        it('should not use store if action is missing', () => {
-            actions.init();
-            spyOn(store, 'dispatch').and.stub();
-
-            actions.runActionById('missing');
-            expect(store.dispatch).not.toHaveBeenCalled();
-        });
-    });
-
-    describe('expressions', () => {
-        it('should eval static value', () => {
-            const value = actions.runExpression('hello world');
-            expect(value).toBe('hello world');
-        });
-
-        it('should eval string as an expression', () => {
-            const value = actions.runExpression('$( "hello world" )');
-            expect(value).toBe('hello world');
-        });
-
-        it('should eval expression with no context', () => {
-            const value = actions.runExpression('$( 1 + 1 )');
-            expect(value).toBe(2);
-        });
-
-        it('should eval expression with context', () => {
-            const context = {
-                a: 'hey',
-                b: 'there'
-            };
-            const expression = '$( context.a + " " + context.b + "!" )';
-            const value = actions.runExpression(expression, context);
-            expect(value).toBe('hey there!');
-        });
-    });
-});
diff --git a/src/app/extensions/actions/action.service.ts b/src/app/extensions/actions/action.service.ts
deleted file mode 100644
index c0245049f..000000000
--- a/src/app/extensions/actions/action.service.ts
+++ /dev/null
@@ -1,76 +0,0 @@
-/*!
- * @license
- * Alfresco Example Content Application
- *
- * Copyright (C) 2005 - 2018 Alfresco Software Limited
- *
- * This file is part of the Alfresco Example Content Application.
- * If the software was purchased under a paid Alfresco license, the terms of
- * the paid license agreement will prevail.  Otherwise, the software is
- * provided under the following open source license terms:
- *
- * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * The Alfresco Example Content Application is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- */
-
-import { Injectable } from '@angular/core';
-import { AppConfigService } from '@alfresco/adf-core';
-import { Store } from '@ngrx/store';
-import { AppStore } from '../../store/states';
-import { ActionRef } from './action-ref';
-
-@Injectable()
-export class ActionService {
-    actions: Array<ActionRef> = [];
-
-    constructor(
-        private config: AppConfigService,
-        private store: Store<AppStore>
-    ) {}
-
-    init() {
-        this.actions = this.config.get<Array<ActionRef>>(
-            'extensions.core.actions',
-            []
-        );
-    }
-
-    getActionById(id: string): ActionRef {
-        return this.actions.find(action => action.id === id);
-    }
-
-    runActionById(id: string, context?: any) {
-        const action = this.getActionById(id);
-        if (action) {
-            const { type, payload } = action;
-            const expression = this.runExpression(payload, context);
-
-            this.store.dispatch({ type, payload: expression });
-        }
-    }
-
-    runExpression(value: string, context?: any) {
-        const pattern = new RegExp(/\$\((.*\)?)\)/g);
-        const matches = pattern.exec(value);
-
-        if (matches && matches.length > 1) {
-            const expression = matches[1];
-            const fn = new Function('context', `return ${expression}`);
-            const result = fn(context);
-
-            return result;
-        }
-
-        return value;
-    }
-}
diff --git a/src/app/extensions/components/toolbar-action/toolbar-action.component.ts b/src/app/extensions/components/toolbar-action/toolbar-action.component.ts
index 5225fa07f..d3b18c549 100644
--- a/src/app/extensions/components/toolbar-action/toolbar-action.component.ts
+++ b/src/app/extensions/components/toolbar-action/toolbar-action.component.ts
@@ -31,13 +31,13 @@ import {
     OnInit,
     OnDestroy
 } from '@angular/core';
-import { ContentActionExtension } from '../../content-action.extension';
 import { AppStore, SelectionState } from '../../../store/states';
 import { Store } from '@ngrx/store';
 import { ExtensionService } from '../../extension.service';
 import { appSelection } from '../../../store/selectors/app.selectors';
 import { Subject } from 'rxjs/Rx';
 import { takeUntil } from 'rxjs/operators';
+import { ContentActionRef } from '../../action.extensions';
 
 @Component({
     selector: 'aca-toolbar-action',
@@ -47,7 +47,7 @@ import { takeUntil } from 'rxjs/operators';
     host: { class: 'aca-toolbar-action' }
 })
 export class ToolbarActionComponent implements OnInit, OnDestroy {
-    @Input() entry: ContentActionExtension;
+    @Input() entry: ContentActionRef;
 
     selection: SelectionState;
     onDestroy$: Subject<boolean> = new Subject<boolean>();
diff --git a/src/app/extensions/core.extensions.module.ts b/src/app/extensions/core.extensions.module.ts
index 488175068..e49863072 100644
--- a/src/app/extensions/core.extensions.module.ts
+++ b/src/app/extensions/core.extensions.module.ts
@@ -30,21 +30,38 @@ import { AboutComponent } from '../components/about/about.component';
 import { LayoutComponent } from '../components/layout/layout.component';
 import { ToolbarActionComponent } from './components/toolbar-action/toolbar-action.component';
 import { CommonModule } from '@angular/common';
-import { RuleService } from './rules/rule.service';
-import { ActionService } from './actions/action.service';
+import { every, some } from './evaluators/core.evaluators';
+import {
+    canCreateFolder,
+    hasFolderSelected,
+    canUpdateSelectedFolder,
+    hasFileSelected,
+    canDownloadSelection
+} from './evaluators/app.evaluators';
 
 @NgModule({
     imports: [CommonModule, CoreModule.forChild()],
     declarations: [ToolbarActionComponent],
     exports: [ToolbarActionComponent],
     entryComponents: [AboutComponent],
-    providers: [ExtensionService, RuleService, ActionService]
+    providers: [ExtensionService]
 })
 export class CoreExtensionsModule {
     constructor(extensions: ExtensionService) {
         extensions
-            .setComponent('aca:layouts/main', LayoutComponent)
-            .setComponent('aca:components/about', AboutComponent)
-            .setAuthGuard('aca:auth', AuthGuardEcm);
+            .setComponent('app.layout.main', LayoutComponent)
+            .setComponent('app.components.about', AboutComponent)
+            .setAuthGuard('app.auth', AuthGuardEcm)
+
+            .setEvaluator('core.every', every)
+            .setEvaluator('core.some', some)
+            .setEvaluator('app.selection.canDownload', canDownloadSelection)
+            .setEvaluator('app.selection.file', hasFileSelected)
+            .setEvaluator('app.selection.folder', hasFolderSelected)
+            .setEvaluator(
+                'app.selection.folder.canUpdate',
+                canUpdateSelectedFolder
+            )
+            .setEvaluator('app.navigation.folder.canCreate', canCreateFolder);
     }
 }
diff --git a/src/app/extensions/rules/app.evaluators.ts b/src/app/extensions/evaluators/app.evaluators.ts
similarity index 96%
rename from src/app/extensions/rules/app.evaluators.ts
rename to src/app/extensions/evaluators/app.evaluators.ts
index 51a7560f5..14681183c 100644
--- a/src/app/extensions/rules/app.evaluators.ts
+++ b/src/app/extensions/evaluators/app.evaluators.ts
@@ -23,9 +23,8 @@
  * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
  */
 
-import { RuleContext } from './rule-context';
-import { RuleParameter } from './rule-parameter';
 import { Node } from 'alfresco-js-api';
+import { RuleContext, RuleParameter } from '../rule.extensions';
 
 export function canCreateFolder(context: RuleContext, ...args: RuleParameter[]): boolean {
     const folder = context.navigation.currentFolder;
diff --git a/src/app/extensions/rules/core.evaluators.ts b/src/app/extensions/evaluators/core.evaluators.ts
similarity index 94%
rename from src/app/extensions/rules/core.evaluators.ts
rename to src/app/extensions/evaluators/core.evaluators.ts
index c69b7888e..9125688f2 100644
--- a/src/app/extensions/rules/core.evaluators.ts
+++ b/src/app/extensions/evaluators/core.evaluators.ts
@@ -23,8 +23,7 @@
  * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
  */
 
-import { RuleContext } from './rule-context';
-import { RuleParameter } from './rule-parameter';
+import { RuleContext, RuleParameter } from '../rule.extensions';
 
 export function every(context: RuleContext, ...args: RuleParameter[]): boolean {
     if (!args || args.length === 0) {
diff --git a/src/app/extensions/extension.config.ts b/src/app/extensions/extension.config.ts
index d239c47af..7c6f3869d 100644
--- a/src/app/extensions/extension.config.ts
+++ b/src/app/extensions/extension.config.ts
@@ -23,13 +23,26 @@
  * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
  */
 
-import { RuleRef } from './rules/rule-ref';
-import { ActionRef } from './actions/action-ref';
-import { RouteRef } from './route-ref';
+import { NavBarGroupRef } from './navbar.extensions';
+import { RouteRef } from './routing.extensions';
+import { RuleRef } from './rule.extensions';
+import { ActionRef, ContentActionRef } from './action.extensions';
 
 export interface ExtensionConfig {
+    version: string;
+    references?: Array<string>;
     rules?: Array<RuleRef>;
     routes?: Array<RouteRef>;
     actions?: Array<ActionRef>;
-    features?: { [key: string]: any };
+    features?: {
+        [key: string]: any;
+        create?: Array<ContentActionRef>;
+        viewer?: {
+            openWith?: Array<ContentActionRef>;
+        };
+        navbar?: Array<NavBarGroupRef>;
+        content?: {
+            actions?: Array<ContentActionRef>;
+        };
+    };
 }
diff --git a/src/app/extensions/extension.service.spec.ts b/src/app/extensions/extension.service.spec.ts
index ac0af9e5c..eb20d9502 100644
--- a/src/app/extensions/extension.service.spec.ts
+++ b/src/app/extensions/extension.service.spec.ts
@@ -26,22 +26,98 @@
 import { TestBed } from '@angular/core/testing';
 import { AppTestingModule } from '../testing/app-testing.module';
 import { ExtensionService } from './extension.service';
-import { AppConfigService } from '@alfresco/adf-core';
-import { ContentActionType } from './content-action.extension';
+import { Store } from '@ngrx/store';
+import { AppStore } from '../store/states';
+import { ContentActionType } from './action.extensions';
 
 describe('ExtensionService', () => {
-    let config: AppConfigService;
     let extensions: ExtensionService;
+    let store: Store<AppStore>;
 
     beforeEach(() => {
         TestBed.configureTestingModule({
             imports: [AppTestingModule]
         });
 
+        store = TestBed.get(Store);
         extensions = TestBed.get(ExtensionService);
+    });
 
-        config = TestBed.get(AppConfigService);
-        config.config['extensions'] = {};
+    describe('actions', () => {
+        beforeEach(() => {
+            extensions.setup({
+                version: '1.0.0',
+                actions: [
+                    {
+                        id: 'aca:actions/create-folder',
+                        type: 'CREATE_FOLDER',
+                        payload: 'folder-name'
+                    }
+                ]
+            });
+        });
+
+        it('should load actions from the config', () => {
+            expect(extensions.actions.length).toBe(1);
+        });
+
+        it('should find action by id', () => {
+            const action = extensions.getActionById(
+                'aca:actions/create-folder'
+            );
+            expect(action).toBeTruthy();
+            expect(action.type).toBe('CREATE_FOLDER');
+            expect(action.payload).toBe('folder-name');
+        });
+
+        it('should not find action by id', () => {
+            const action = extensions.getActionById('missing');
+            expect(action).toBeFalsy();
+        });
+
+        it('should run the action via store', () => {
+            spyOn(store, 'dispatch').and.stub();
+
+            extensions.runActionById('aca:actions/create-folder');
+            expect(store.dispatch).toHaveBeenCalledWith({
+                type: 'CREATE_FOLDER',
+                payload: 'folder-name'
+            });
+        });
+
+        it('should not use store if action is missing', () => {
+            spyOn(store, 'dispatch').and.stub();
+
+            extensions.runActionById('missing');
+            expect(store.dispatch).not.toHaveBeenCalled();
+        });
+    });
+
+    describe('expressions', () => {
+        it('should eval static value', () => {
+            const value = extensions.runExpression('hello world');
+            expect(value).toBe('hello world');
+        });
+
+        it('should eval string as an expression', () => {
+            const value = extensions.runExpression('$( "hello world" )');
+            expect(value).toBe('hello world');
+        });
+
+        it('should eval expression with no context', () => {
+            const value = extensions.runExpression('$( 1 + 1 )');
+            expect(value).toBe(2);
+        });
+
+        it('should eval expression with context', () => {
+            const context = {
+                a: 'hey',
+                b: 'there'
+            };
+            const expression = '$( context.a + " " + context.b + "!" )';
+            const value = extensions.runExpression(expression, context);
+            expect(value).toBe('hey there!');
+        });
     });
 
     describe('auth guards', () => {
@@ -54,8 +130,6 @@ describe('ExtensionService', () => {
 
             extensions.authGuards['guard1'] = guard1;
             extensions.authGuards['guard2'] = guard2;
-
-            extensions.init();
         });
 
         it('should fetch auth guards by ids', () => {
@@ -86,7 +160,6 @@ describe('ExtensionService', () => {
             component1 = {};
 
             extensions.components['component-1'] = component1;
-            extensions.init();
         });
 
         it('should fetch registered component', () => {
@@ -105,22 +178,21 @@ describe('ExtensionService', () => {
         let guard1;
 
         beforeEach(() => {
-            config.config.extensions = {
-                core: {
-                    routes: [
-                        {
-                            id: 'aca:routes/about',
-                            path: 'ext/about',
-                            component: 'aca:components/about',
-                            layout: 'aca:layouts/main',
-                            auth: ['aca:auth'],
-                            data: {
-                                title: 'Custom About'
-                            }
+            extensions.setup({
+                version: '1.0.0',
+                routes: [
+                    {
+                        id: 'aca:routes/about',
+                        path: 'ext/about',
+                        component: 'aca:components/about',
+                        layout: 'aca:layouts/main',
+                        auth: ['aca:auth'],
+                        data: {
+                            title: 'Custom About'
                         }
-                    ]
-                }
-            };
+                    }
+                ]
+            });
 
             component1 = {};
             component2 = {};
@@ -129,8 +201,6 @@ describe('ExtensionService', () => {
 
             guard1 = {};
             extensions.authGuards['aca:auth'] = guard1;
-
-            extensions.init();
         });
 
         it('should load routes from the config', () => {
@@ -166,60 +236,54 @@ describe('ExtensionService', () => {
 
     describe('content actions', () => {
         it('should load content actions from the config', () => {
-            config.config.extensions = {
-                core: {
-                    features: {
-                        content: {
-                            actions: [
-                                {
-                                    id: 'aca:toolbar/separator-1',
-                                    order: 1,
-                                    type: 'separator'
-                                },
-                                {
-                                    id: 'aca:toolbar/separator-2',
-                                    order: 2,
-                                    type: 'separator'
-                                }
-                            ]
-                        }
+            extensions.setup({
+                version: '1.0.0',
+                features: {
+                    content: {
+                        actions: [
+                            {
+                                id: 'aca:toolbar/separator-1',
+                                order: 1,
+                                type: ContentActionType.separator,
+                                title: 'action1',
+                            },
+                            {
+                                id: 'aca:toolbar/separator-2',
+                                order: 2,
+                                type: ContentActionType.separator,
+                                title: 'action2'
+                            }
+                        ]
                     }
                 }
-            };
+            });
 
-            extensions.init();
             expect(extensions.contentActions.length).toBe(2);
         });
 
-        it('should have an empty content action list if config is empty', () => {
-            config.config.extensions = {};
-            extensions.init();
-            expect(extensions.contentActions).toEqual([]);
-        });
-
         it('should sort content actions by order', () => {
-            config.config.extensions = {
-                core: {
-                    features: {
-                        content: {
-                            actions: [
-                                {
-                                    id: 'aca:toolbar/separator-2',
-                                    order: 2,
-                                    type: 'separator'
-                                },
-                                {
-                                    id: 'aca:toolbar/separator-1',
-                                    order: 1,
-                                    type: 'separator'
-                                }
-                            ]
-                        }
+            extensions.setup({
+                version: '1.0.0',
+                features: {
+                    content: {
+                        actions: [
+                            {
+                                id: 'aca:toolbar/separator-2',
+                                order: 2,
+                                type: ContentActionType.separator,
+                                title: 'action2'
+                            },
+                            {
+                                id: 'aca:toolbar/separator-1',
+                                order: 1,
+                                type: ContentActionType.separator,
+                                title: 'action1'
+                            }
+                        ]
                     }
                 }
-            };
+            });
 
-            extensions.init();
             expect(extensions.contentActions.length).toBe(2);
             expect(extensions.contentActions[0].id).toBe(
                 'aca:toolbar/separator-1'
@@ -232,94 +296,97 @@ describe('ExtensionService', () => {
 
     describe('open with', () => {
         it('should load [open with] actions for the viewer', () => {
-            config.config.extensions = {
-                core: {
-                    features: {
-                        viewer: {
-                            'open-with': [
-                                {
-                                    disabled: false,
-                                    id: 'aca:viewer/action1',
-                                    order: 100,
-                                    icon: 'build',
-                                    title: 'Snackbar',
-                                    action: 'aca:actions/info'
+            extensions.setup({
+                version: '1.0.0',
+                features: {
+                    viewer: {
+                        openWith: [
+                            {
+                                disabled: false,
+                                id: 'aca:viewer/action1',
+                                order: 100,
+                                icon: 'build',
+                                title: 'Snackbar',
+                                type: ContentActionType.default,
+                                actions: {
+                                    click: 'aca:actions/info'
                                 }
-                            ]
-                        }
+                            }
+                        ]
                     }
                 }
-            };
+            });
 
-            extensions.init();
             expect(extensions.openWithActions.length).toBe(1);
         });
 
-        it('should have an empty [open with] list if config is empty', () => {
-            config.config.extensions = {};
-            extensions.init();
-            expect(extensions.openWithActions).toEqual([]);
-        });
-
         it('should load only enabled [open with] actions for the viewer', () => {
-            config.config.extensions = {
-                core: {
-                    features: {
-                        viewer: {
-                            'open-with': [
-                                {
-                                    id: 'aca:viewer/action2',
-                                    order: 200,
-                                    icon: 'build',
-                                    title: 'Snackbar',
-                                    action: 'aca:actions/info'
-                                },
-                                {
-                                    disabled: true,
-                                    id: 'aca:viewer/action1',
-                                    order: 100,
-                                    icon: 'build',
-                                    title: 'Snackbar',
-                                    action: 'aca:actions/info'
+            extensions.setup({
+                version: '1.0.0',
+                features: {
+                    viewer: {
+                        openWith: [
+                            {
+                                id: 'aca:viewer/action2',
+                                order: 200,
+                                icon: 'build',
+                                title: 'Snackbar',
+                                type: ContentActionType.default,
+                                actions: {
+                                    click: 'aca:actions/info'
                                 }
-                            ]
-                        }
+                            },
+                            {
+                                disabled: true,
+                                id: 'aca:viewer/action1',
+                                order: 100,
+                                icon: 'build',
+                                title: 'Snackbar',
+                                type: ContentActionType.default,
+                                actions: {
+                                    click: 'aca:actions/info'
+                                }
+                            }
+                        ]
                     }
                 }
-            };
+            });
 
-            extensions.init();
             expect(extensions.openWithActions.length).toBe(1);
             expect(extensions.openWithActions[0].id).toBe('aca:viewer/action2');
         });
 
         it('should sort [open with] actions by order', () => {
-            config.config.extensions = {
-                core: {
-                    features: {
-                        viewer: {
-                            'open-with': [
-                                {
-                                    id: 'aca:viewer/action2',
-                                    order: 200,
-                                    icon: 'build',
-                                    title: 'Snackbar',
-                                    action: 'aca:actions/info'
-                                },
-                                {
-                                    id: 'aca:viewer/action1',
-                                    order: 100,
-                                    icon: 'build',
-                                    title: 'Snackbar',
-                                    action: 'aca:actions/info'
+            extensions.setup({
+                version: '1.0.0',
+                features: {
+                    viewer: {
+                        openWith: [
+                            {
+                                id: 'aca:viewer/action2',
+                                order: 200,
+                                icon: 'build',
+                                title: 'Snackbar',
+                                type: ContentActionType.default,
+                                actions: {
+                                    click: 'aca:actions/info'
                                 }
-                            ]
-                        }
+                            },
+                            {
+                                id: 'aca:viewer/action1',
+                                order: 100,
+                                icon: 'build',
+                                title: 'Snackbar',
+                                type: ContentActionType.default,
+                                actions: {
+                                    click: 'aca:actions/info'
+                                }
+                            }
+                        ]
                     }
                 }
-            };
+            });
 
-            extensions.init();
             expect(extensions.openWithActions.length).toBe(2);
             expect(extensions.openWithActions[0].id).toBe('aca:viewer/action1');
             expect(extensions.openWithActions[1].id).toBe('aca:viewer/action2');
@@ -328,67 +395,47 @@ describe('ExtensionService', () => {
 
     describe('create', () => {
         it('should load [create] actions from config', () => {
-            config.config.extensions = {
-                core: {
-                    features: {
-                        create: [
-                            {
-                                disabled: false,
-                                id: 'aca:create/folder',
-                                order: 100,
-                                icon: 'create_new_folder',
-                                title: 'ext: Create Folder',
-                                target: {
-                                    permissions: ['create'],
-                                    action: 'aca:actions/create-folder'
-                                }
-                            }
-                        ]
-                    }
+            extensions.setup({
+                version: '1.0.0',
+                features: {
+                    create: [
+                        {
+                            id: 'aca:create/folder',
+                            order: 100,
+                            icon: 'create_new_folder',
+                            title: 'ext: Create Folder',
+                            type: ContentActionType.default
+                        }
+                    ]
                 }
-            };
+            });
 
-            extensions.init();
             expect(extensions.createActions.length).toBe(1);
         });
 
-        it('should have an empty [create] actions if config is empty', () => {
-            config.config.extensions = {};
-            extensions.init();
-            expect(extensions.createActions).toEqual([]);
-        });
-
         it('should sort [create] actions by order', () => {
-            config.config.extensions = {
-                core: {
-                    features: {
-                        create: [
-                            {
-                                id: 'aca:create/folder',
-                                order: 100,
-                                icon: 'create_new_folder',
-                                title: 'ext: Create Folder',
-                                target: {
-                                    permissions: ['create'],
-                                    action: 'aca:actions/create-folder'
-                                }
-                            },
-                            {
-                                id: 'aca:create/folder-2',
-                                order: 10,
-                                icon: 'create_new_folder',
-                                title: 'ext: Create Folder',
-                                target: {
-                                    permissions: ['create'],
-                                    action: 'aca:actions/create-folder'
-                                }
-                            }
-                        ]
-                    }
+            extensions.setup({
+                version: '1.0.0',
+                features: {
+                    create: [
+                        {
+                            id: 'aca:create/folder',
+                            order: 100,
+                            icon: 'create_new_folder',
+                            title: 'ext: Create Folder',
+                            type: ContentActionType.default
+                        },
+                        {
+                            id: 'aca:create/folder-2',
+                            order: 10,
+                            icon: 'create_new_folder',
+                            title: 'ext: Create Folder',
+                            type: ContentActionType.default
+                        }
+                    ]
                 }
-            };
+            });
 
-            extensions.init();
             expect(extensions.createActions.length).toBe(2);
             expect(extensions.createActions[0].id).toBe('aca:create/folder-2');
             expect(extensions.createActions[1].id).toBe('aca:create/folder');
diff --git a/src/app/extensions/extension.service.ts b/src/app/extensions/extension.service.ts
index 3d514ee15..e9db7d14a 100644
--- a/src/app/extensions/extension.service.ts
+++ b/src/app/extensions/extension.service.ts
@@ -24,69 +24,190 @@
  */
 
 import { Injectable, Type } from '@angular/core';
-import { AppConfigService } from '@alfresco/adf-core';
-import {
-    ContentActionExtension,
-    ContentActionType
-} from './content-action.extension';
-import { OpenWithExtension } from './open-with.extension';
-import { NavigationExtension } from './navigation.extension';
+import { HttpClient } from '@angular/common/http';
+import { Store } from '@ngrx/store';
 import { Route } from '@angular/router';
-import { Node } from 'alfresco-js-api';
-import { RuleService } from './rules/rule.service';
-import { ActionService } from './actions/action.service';
-import { ActionRef } from './actions/action-ref';
-import { RouteRef } from './route-ref';
+import { ExtensionConfig } from './extension.config';
+import { AppStore, SelectionState } from '../store/states';
+import { NavigationState } from '../store/states/navigation.state';
+import { selectionWithFolder } from '../store/selectors/app.selectors';
+import { NavBarGroupRef } from './navbar.extensions';
+import { RouteRef } from './routing.extensions';
+import { RuleContext, RuleRef, RuleEvaluator } from './rule.extensions';
+import { ActionRef, ContentActionRef, ContentActionType } from './action.extensions';
 
 @Injectable()
-export class ExtensionService {
+export class ExtensionService implements RuleContext {
+    configPath = 'assets/app.extensions.json';
+    pluginsPath = 'assets/plugins';
 
-    contentActions: Array<ContentActionExtension> = [];
-    openWithActions: Array<OpenWithExtension> = [];
-    createActions: Array<ContentActionExtension> = [];
+    defaults = {
+        layout: 'app.layout.main',
+        auth: ['app.auth']
+    };
 
+    rules: Array<RuleRef> = [];
     routes: Array<RouteRef> = [];
+    actions: Array<ActionRef> = [];
+
+    contentActions: Array<ContentActionRef> = [];
+    openWithActions: Array<ContentActionRef> = [];
+    createActions: Array<ContentActionRef> = [];
+    navbar: Array<NavBarGroupRef> = [];
+
     authGuards: { [key: string]: Type<{}> } = {};
     components: { [key: string]: Type<{}> } = {};
 
-    constructor(
-        private config: AppConfigService,
-        private ruleService: RuleService,
-        private actionService: ActionService
-    ) {}
+    evaluators: { [key: string]: RuleEvaluator } = {};
+    selection: SelectionState;
+    navigation: NavigationState;
 
-    // initialise extension service
-    // in future will also load and merge data from the external plugins
-    init() {
-        this.routes = this.config.get<Array<RouteRef>>(
-            'extensions.core.routes',
-            []
-        );
+    constructor(private http: HttpClient, private store: Store<AppStore>) {
+        this.store.select(selectionWithFolder).subscribe(result => {
+            this.selection = result.selection;
+            this.navigation = result.navigation;
+        });
+    }
 
-        this.contentActions = this.config
-            .get<Array<ContentActionExtension>>(
-                'extensions.core.features.content.actions',
-                []
-            )
-            .sort(this.sortByOrder);
+    load(): Promise<boolean> {
+        return new Promise<any>(resolve => {
+            this.loadConfig(this.configPath, 0).then(result => {
+                let config = result.config;
 
-        this.openWithActions = this.config
-            .get<Array<OpenWithExtension>>(
-                'extensions.core.features.viewer.open-with',
-                []
-            )
-            .filter(entry => !entry.disabled)
-            .sort(this.sortByOrder);
+                if (config.references && config.references.length > 0) {
+                    const plugins = config.references.map(
+                        (name, idx) => this.loadConfig(`${this.pluginsPath}/${name}`, idx)
+                    );
 
-        this.createActions = this.config
-            .get<Array<ContentActionExtension>>(
-                'extensions.core.features.create',
-                []
-            )
-            .sort(this.sortByOrder);
+                    Promise.all(plugins).then((results => {
+                        const configs = results
+                            .filter(entry => entry)
+                            .sort(this.sortByOrder)
+                            .map(entry => entry.config);
 
-        this.ruleService.init();
-        this.actionService.init();
+                        if (configs.length > 0) {
+                            config = this.mergeConfigs(config, ...configs);
+                        }
+
+                        this.setup(config);
+                        resolve(true);
+                    }));
+                } else {
+                    this.setup(config);
+                    resolve(true);
+                }
+            });
+        });
+    }
+
+    setup(config: ExtensionConfig) {
+        if (!config) {
+            console.error('Extension configuration not found');
+            return;
+        }
+
+        this.rules = this.loadRules(config);
+        this.actions = this.loadActions(config);
+        this.routes = this.loadRoutes(config);
+        this.contentActions = this.loadContentActions(config);
+        this.openWithActions = this.loadViewerOpenWith(config);
+        this.createActions = this.loadCreateActions(config);
+        this.navbar = this.loadNavBar(config);
+    }
+
+    protected loadConfig(url: string, order: number): Promise<{ order: number, config: ExtensionConfig }> {
+        return new Promise(resolve => {
+            this.http.get<ExtensionConfig>(url).subscribe(
+                config => {
+                    resolve({
+                        order,
+                        config
+                    });
+                },
+                error => {
+                    console.log(error);
+                    resolve(null);
+                }
+            );
+        });
+    }
+
+    protected loadCreateActions(config: ExtensionConfig): Array<ContentActionRef> {
+        if (config && config.features) {
+            return (config.features.create || []).sort(
+                this.sortByOrder
+            );
+        }
+        return [];
+    }
+
+    protected loadContentActions(config: ExtensionConfig) {
+        if (config && config.features && config.features.content) {
+            return (config.features.content.actions || []).sort(
+                this.sortByOrder
+            );
+        }
+        return [];
+    }
+
+    protected loadNavBar(config: ExtensionConfig): any {
+        if (config && config.features) {
+            return (config.features.navbar || [])
+                .filter(entry => !entry.disabled)
+                .sort(this.sortByOrder)
+                .map(group => {
+                    return {
+                        ...group,
+                        items: (group.items || [])
+                            .filter(item => !item.disabled)
+                            .sort(this.sortByOrder)
+                            .map(item => {
+                                const routeRef = this.getRouteById(item.route);
+                                const url = `/${routeRef ? routeRef.path : item.route}`;
+                                return {
+                                    ...item,
+                                    url
+                                };
+                            })
+                    };
+                });
+        }
+        return {};
+    }
+
+    protected loadViewerOpenWith(config: ExtensionConfig): Array<ContentActionRef> {
+        if (config && config.features && config.features.viewer) {
+            return (config.features.viewer.openWith || [])
+                .filter(entry => !entry.disabled)
+                .sort(this.sortByOrder);
+        }
+        return [];
+    }
+
+    protected loadRules(config: ExtensionConfig): Array<RuleRef> {
+        if (config && config.rules) {
+            return config.rules;
+        }
+        return [];
+    }
+
+    protected loadRoutes(config: ExtensionConfig): Array<RouteRef> {
+        if (config) {
+            return config.routes || [];
+        }
+        return [];
+    }
+
+    protected loadActions(config: ExtensionConfig): Array<ActionRef> {
+        if (config) {
+            return config.actions || [];
+        }
+        return [];
+    }
+
+    setEvaluator(key: string, value: RuleEvaluator): ExtensionService {
+        this.evaluators[key] = value;
+        return this;
     }
 
     setAuthGuard(key: string, value: Type<{}>): ExtensionService {
@@ -98,45 +219,14 @@ export class ExtensionService {
         return this.routes.find(route => route.id === id);
     }
 
-    getActionById(id: string): ActionRef {
-        return this.actionService.getActionById(id);
-    }
-
-    runActionById(id: string, context?: any) {
-        this.actionService.runActionById(id, context);
-    }
-
     getAuthGuards(ids: string[]): Array<Type<{}>> {
         return (ids || [])
             .map(id => this.authGuards[id])
             .filter(guard => guard);
     }
 
-    getNavigationGroups(): Array<NavigationExtension[]> {
-        const settings = this.config.get<any>(
-            'extensions.core.features.navigation'
-        );
-        if (settings) {
-            const groups = Object.keys(settings).map(key => {
-                return settings[key]
-                    .map(group => {
-                        const customRoute = this.getRouteById(group.route);
-                        const route = `/${
-                            customRoute ? customRoute.path : group.route
-                        }`;
-
-                        return {
-                            ...group,
-                            route
-                        };
-                    })
-                    .filter(entry => !entry.disabled);
-            });
-
-            return groups;
-        }
-
-        return [];
+    getNavigationGroups(): Array<NavBarGroupRef> {
+        return this.navbar;
     }
 
     setComponent(id: string, value: Type<{}>): ExtensionService {
@@ -150,11 +240,15 @@ export class ExtensionService {
 
     getApplicationRoutes(): Array<Route> {
         return this.routes.map(route => {
-            const guards = this.getAuthGuards(route.auth);
+            const guards = this.getAuthGuards(
+                route.auth && route.auth.length > 0
+                    ? route.auth
+                    : this.defaults.auth
+            );
 
             return {
                 path: route.path,
-                component: this.getComponentById(route.layout),
+                component: this.getComponentById(route.layout || this.defaults.layout),
                 canActivateChild: guards,
                 canActivate: guards,
                 children: [
@@ -168,8 +262,7 @@ export class ExtensionService {
         });
     }
 
-    // evaluates create actions for the folder node
-    getFolderCreateActions(folder: Node): Array<ContentActionExtension> {
+    getCreateActions(): Array<ContentActionRef> {
         return this.createActions
             .filter(this.filterEnabled)
             .filter(action => this.filterByRules(action))
@@ -177,18 +270,18 @@ export class ExtensionService {
                 let disabled = false;
 
                 if (action.rules && action.rules.enabled) {
-                    disabled = !this.ruleService.evaluateRule(action.rules.enabled);
+                    disabled = !this.evaluateRule(action.rules.enabled);
                 }
 
                 return {
                     ...action,
                     disabled
                 };
-        });
+            });
     }
 
     // evaluates content actions for the selection and parent folder node
-    getAllowedContentActions(): Array<ContentActionExtension> {
+    getAllowedContentActions(): Array<ContentActionRef> {
         return this.contentActions
             .filter(this.filterEnabled)
             .filter(action => this.filterByRules(action))
@@ -211,11 +304,11 @@ export class ExtensionService {
     }
 
     reduceSeparators(
-        acc: ContentActionExtension[],
-        el: ContentActionExtension,
+        acc: ContentActionRef[],
+        el: ContentActionRef,
         i: number,
-        arr: ContentActionExtension[]
-    ): ContentActionExtension[] {
+        arr: ContentActionRef[]
+    ): ContentActionRef[] {
         // remove duplicate separators
         if (i > 0) {
             const prev = arr[i - 1];
@@ -238,9 +331,9 @@ export class ExtensionService {
     }
 
     reduceEmptyMenus(
-        acc: ContentActionExtension[],
-        el: ContentActionExtension
-    ): ContentActionExtension[] {
+        acc: ContentActionRef[],
+        el: ContentActionRef
+    ): ContentActionRef[] {
         if (el.type === ContentActionType.menu) {
             if ((el.children || []).length === 0) {
                 return acc;
@@ -262,7 +355,7 @@ export class ExtensionService {
         return !entry.disabled;
     }
 
-    copyAction(action: ContentActionExtension): ContentActionExtension {
+    copyAction(action: ContentActionRef): ContentActionRef {
         return {
             ...action,
             children: (action.children || []).map(child =>
@@ -271,10 +364,70 @@ export class ExtensionService {
         };
     }
 
-    filterByRules(action: ContentActionExtension): boolean {
+    filterByRules(action: ContentActionRef): boolean {
         if (action && action.rules && action.rules.visible) {
-            return this.ruleService.evaluateRule(action.rules.visible);
+            return this.evaluateRule(action.rules.visible);
         }
         return true;
     }
+
+    getActionById(id: string): ActionRef {
+        return this.actions.find(action => action.id === id);
+    }
+
+    runActionById(id: string, context?: any) {
+        const action = this.getActionById(id);
+        if (action) {
+            const { type, payload } = action;
+            const expression = this.runExpression(payload, context);
+
+            this.store.dispatch({ type, payload: expression });
+        }
+    }
+
+    runExpression(value: string, context?: any) {
+        const pattern = new RegExp(/\$\((.*\)?)\)/g);
+        const matches = pattern.exec(value);
+
+        if (matches && matches.length > 1) {
+            const expression = matches[1];
+            const fn = new Function('context', `return ${expression}`);
+            const result = fn(context);
+
+            return result;
+        }
+
+        return value;
+    }
+
+    evaluateRule(ruleId: string): boolean {
+        const ruleRef = this.rules.find(ref => ref.id === ruleId);
+        if (ruleRef) {
+            const evaluator = this.evaluators[ruleRef.type];
+            if (evaluator) {
+                return evaluator(this, ...ruleRef.parameters);
+            }
+        }
+        return false;
+    }
+
+    // todo: requires overwrite support for array entries
+    // todo: overwrite only particular areas, don't touch version or other top-level props
+    protected mergeConfigs(...objects): any {
+        const result = {};
+
+        objects.forEach(source => {
+            Object.keys(source).forEach(prop => {
+                if (prop in result && Array.isArray(result[prop])) {
+                    result[prop] = result[prop].concat(source[prop]);
+                } else if (prop in result && typeof result[prop] === 'object') {
+                    result[prop] = this.mergeConfigs(result[prop], source[prop]);
+                } else {
+                    result[prop] = source[prop];
+                }
+            });
+        });
+
+        return result;
+    }
 }
diff --git a/src/app/extensions/navigation.extension.ts b/src/app/extensions/navbar.extensions.ts
similarity index 83%
rename from src/app/extensions/navigation.extension.ts
rename to src/app/extensions/navbar.extensions.ts
index ad715b374..e456cd737 100644
--- a/src/app/extensions/navigation.extension.ts
+++ b/src/app/extensions/navbar.extensions.ts
@@ -23,12 +23,22 @@
  * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
  */
 
-export interface NavigationExtension {
+export interface NavBarGroupRef {
+    id: string;
+    items: Array<NavBarLinkRef>;
+
+    order?: number;
+    disabled?: boolean;
+}
+
+export interface NavBarLinkRef {
     id: string;
-    order: number;
     icon: string;
     title: string;
     route: string;
+
+    url?: string; // evaluated at runtime based on route ref
     description?: string;
+    order?: number;
     disabled?: boolean;
 }
diff --git a/src/app/extensions/open-with.extension.ts b/src/app/extensions/open-with.extension.ts
deleted file mode 100644
index dcacfa6f8..000000000
--- a/src/app/extensions/open-with.extension.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-/*!
- * @license
- * Alfresco Example Content Application
- *
- * Copyright (C) 2005 - 2018 Alfresco Software Limited
- *
- * This file is part of the Alfresco Example Content Application.
- * If the software was purchased under a paid Alfresco license, the terms of
- * the paid license agreement will prevail.  Otherwise, the software is
- * provided under the following open source license terms:
- *
- * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * The Alfresco Example Content Application is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- */
-
-export interface OpenWithExtension {
-    id: string;
-    order?: number;
-    icon: string;
-    title: string;
-    action: string;
-    disabled?: boolean;
-}
diff --git a/src/app/extensions/route-ref.ts b/src/app/extensions/routing.extensions.ts
similarity index 96%
rename from src/app/extensions/route-ref.ts
rename to src/app/extensions/routing.extensions.ts
index 2a0d5992c..4e0d07ad5 100644
--- a/src/app/extensions/route-ref.ts
+++ b/src/app/extensions/routing.extensions.ts
@@ -27,7 +27,8 @@ export interface RouteRef {
     id: string;
     path: string;
     component: string;
-    layout: string;
-    auth: string[];
+
+    layout?: string;
+    auth?: string[];
     data?: { [key: string]: string };
 }
diff --git a/src/app/extensions/rules/rule-context.ts b/src/app/extensions/rule.extensions.ts
similarity index 77%
rename from src/app/extensions/rules/rule-context.ts
rename to src/app/extensions/rule.extensions.ts
index 80ac871fe..cc3fbe769 100644
--- a/src/app/extensions/rules/rule-context.ts
+++ b/src/app/extensions/rule.extensions.ts
@@ -23,12 +23,24 @@
  * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
  */
 
-import { SelectionState } from '../../store/states';
-import { RuleEvaluator } from './rule.service';
-import { NavigationState } from '../../store/states/navigation.state';
+import { SelectionState } from '../store/states';
+import { NavigationState } from '../store/states/navigation.state';
+
+export type RuleEvaluator = (context: RuleContext, ...args: any[]) => boolean;
 
 export interface RuleContext {
     selection: SelectionState;
     navigation: NavigationState;
     evaluators: { [key: string]: RuleEvaluator };
 }
+
+export class RuleRef {
+    type: string;
+    id?: string;
+    parameters?: Array<RuleParameter>;
+}
+
+export interface RuleParameter {
+    type: string;
+    value: any;
+}
diff --git a/src/app/extensions/rules/rule-parameter.ts b/src/app/extensions/rules/rule-parameter.ts
deleted file mode 100644
index 798976503..000000000
--- a/src/app/extensions/rules/rule-parameter.ts
+++ /dev/null
@@ -1,29 +0,0 @@
-/*!
- * @license
- * Alfresco Example Content Application
- *
- * Copyright (C) 2005 - 2018 Alfresco Software Limited
- *
- * This file is part of the Alfresco Example Content Application.
- * If the software was purchased under a paid Alfresco license, the terms of
- * the paid license agreement will prevail.  Otherwise, the software is
- * provided under the following open source license terms:
- *
- * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * The Alfresco Example Content Application is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- */
-
-export interface RuleParameter {
-    type: string;
-    value: any;
-}
diff --git a/src/app/extensions/rules/rule-ref.ts b/src/app/extensions/rules/rule-ref.ts
deleted file mode 100644
index da8fdb7fd..000000000
--- a/src/app/extensions/rules/rule-ref.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-/*!
- * @license
- * Alfresco Example Content Application
- *
- * Copyright (C) 2005 - 2018 Alfresco Software Limited
- *
- * This file is part of the Alfresco Example Content Application.
- * If the software was purchased under a paid Alfresco license, the terms of
- * the paid license agreement will prevail.  Otherwise, the software is
- * provided under the following open source license terms:
- *
- * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * The Alfresco Example Content Application is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- */
-
-import { RuleParameter } from './rule-parameter';
-import { RuleEvaluator } from './rule.service';
-
-export class RuleRef {
-    type: string;
-    id?: string;
-    parameters?: Array<RuleParameter>;
-    evaluator?: RuleEvaluator;
-}
diff --git a/src/app/extensions/rules/rule.service.ts b/src/app/extensions/rules/rule.service.ts
deleted file mode 100644
index 34daf6063..000000000
--- a/src/app/extensions/rules/rule.service.ts
+++ /dev/null
@@ -1,97 +0,0 @@
-/*!
- * @license
- * Alfresco Example Content Application
- *
- * Copyright (C) 2005 - 2018 Alfresco Software Limited
- *
- * This file is part of the Alfresco Example Content Application.
- * If the software was purchased under a paid Alfresco license, the terms of
- * the paid license agreement will prevail.  Otherwise, the software is
- * provided under the following open source license terms:
- *
- * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * The Alfresco Example Content Application is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- */
-
-import { Injectable } from '@angular/core';
-import { AppConfigService } from '@alfresco/adf-core';
-import { every, some } from './core.evaluators';
-import { RuleContext } from './rule-context';
-import { RuleRef } from './rule-ref';
-import { createSelector, Store } from '@ngrx/store';
-import {
-    appSelection,
-    appNavigation
-} from '../../store/selectors/app.selectors';
-import { AppStore, SelectionState } from '../../store/states';
-import { NavigationState } from '../../store/states/navigation.state';
-import { canCreateFolder, hasFolderSelected, canUpdateSelectedFolder, hasFileSelected, canDownloadSelection } from './app.evaluators';
-
-export type RuleEvaluator = (context: RuleContext, ...args: any[]) => boolean;
-
-export const selectionWithFolder = createSelector(
-    appSelection,
-    appNavigation,
-    (selection, navigation) => {
-        return {
-            selection,
-            navigation
-        };
-    }
-);
-
-@Injectable()
-export class RuleService implements RuleContext {
-    rules: Array<RuleRef> = [];
-    evaluators: { [key: string]: RuleEvaluator } = {};
-    selection: SelectionState;
-    navigation: NavigationState;
-
-    constructor(
-        private config: AppConfigService,
-        private store: Store<AppStore>
-    ) {
-        this.evaluators['core.every'] = every;
-        this.evaluators['core.some'] = some;
-        this.evaluators['app.selection.canDownload'] = canDownloadSelection;
-        this.evaluators['app.selection.file'] = hasFileSelected;
-        this.evaluators['app.selection.folder'] = hasFolderSelected;
-        this.evaluators['app.selection.folder.canUpdate'] = canUpdateSelectedFolder;
-        this.evaluators['app.navigation.folder.canCreate'] = canCreateFolder;
-
-        this.store
-            .select(selectionWithFolder)
-            .subscribe(result => {
-                this.selection = result.selection;
-                this.navigation = result.navigation;
-            });
-    }
-
-    init() {
-        this.rules = this.config
-            .get<Array<RuleRef>>('extensions.core.rules', [])
-            .map(rule => {
-                rule.evaluator = this.evaluators[rule.type];
-                return rule;
-            });
-    }
-
-    evaluateRule(ruleId: string): boolean {
-        const ruleRef = this.rules.find(ref => ref.id === ruleId);
-
-        if (ruleRef.evaluator) {
-            return ruleRef.evaluator(this, ...ruleRef.parameters);
-        }
-        return false;
-    }
-}
diff --git a/src/app/store/selectors/app.selectors.ts b/src/app/store/selectors/app.selectors.ts
index da23f79e1..4e5f8788c 100644
--- a/src/app/store/selectors/app.selectors.ts
+++ b/src/app/store/selectors/app.selectors.ts
@@ -36,3 +36,14 @@ export const selectUser =  createSelector(selectApp, state => state.user);
 export const sharedUrl =  createSelector(selectApp, state => state.sharedUrl);
 export const appNavigation = createSelector(selectApp, state => state.navigation);
 export const currentFolder = createSelector(selectApp, state => state.navigation.currentFolder);
+
+export const selectionWithFolder = createSelector(
+    appSelection,
+    appNavigation,
+    (selection, navigation) => {
+        return {
+            selection,
+            navigation
+        };
+    }
+);
diff --git a/src/app/testing/app-testing.module.ts b/src/app/testing/app-testing.module.ts
index e4a56ccbe..3648b3fe6 100644
--- a/src/app/testing/app-testing.module.ts
+++ b/src/app/testing/app-testing.module.ts
@@ -60,8 +60,6 @@ import { NodeActionsService } from '../services/node-actions.service';
 import { NodePermissionService } from '../services/node-permission.service';
 import { ContentApiService } from '../services/content-api.service';
 import { ExtensionService } from '../extensions/extension.service';
-import { RuleService } from '../extensions/rules/rule.service';
-import { ActionService } from '../extensions/actions/action.service';
 
 @NgModule({
     imports: [
@@ -114,9 +112,7 @@ import { ActionService } from '../extensions/actions/action.service';
         NodeActionsService,
         NodePermissionService,
         ContentApiService,
-        ExtensionService,
-        RuleService,
-        ActionService
+        ExtensionService
     ]
 })
 export class AppTestingModule {}
diff --git a/src/assets/app.extensions.json b/src/assets/app.extensions.json
new file mode 100644
index 000000000..b3f57d5dc
--- /dev/null
+++ b/src/assets/app.extensions.json
@@ -0,0 +1,189 @@
+{
+    "$schema": "../../extension.schema.json",
+    "name": "app",
+    "version": "1.0.0",
+
+    "references": [
+        "plugin1.json",
+        "plugin2.json"
+    ],
+
+    "rules": [
+        {
+            "id": "app.create.canCreateFolder",
+            "type": "app.navigation.folder.canCreate"
+        },
+        {
+            "id": "app.toolbar.canEditFolder",
+            "type": "core.every",
+            "parameters": [
+                { "type": "rule", "value": "app.selection.folder" },
+                { "type": "rule", "value": "app.selection.folder.canUpdate" }
+            ]
+        },
+        {
+            "id": "app.toolbar.canViewFile",
+            "type": "app.selection.file"
+        },
+        {
+            "id": "app.toolbar.canDownload",
+            "type": "app.selection.canDownload"
+        }
+    ],
+
+    "actions": [
+        {
+            "id": "app.actions.createFolder",
+            "type": "CREATE_FOLDER"
+        },
+        {
+            "id": "app.actions.editFolder",
+            "type": "EDIT_FOLDER"
+        },
+        {
+            "id": "app.actions.download",
+            "type": "DOWNLOAD_NODES"
+        },
+        {
+            "id": "app.actions.preview",
+            "type": "VIEW_FILE"
+        }
+    ],
+
+    "features": {
+        "create": [
+            {
+                "id": "app.create.folder",
+                "type": "default",
+                "icon": "create_new_folder",
+                "title": "ext: Create Folder",
+                "actions": {
+                    "click": "app.actions.createFolder"
+                },
+                "rules": {
+                    "enabled": "app.create.canCreateFolder"
+                }
+            }
+        ],
+        "navbar": [
+            {
+                "id": "app.navbar.primary",
+                "items": [
+                    {
+                        "id": "app.navbar.personalFiles",
+                        "icon": "folder",
+                        "title": "APP.BROWSE.PERSONAL.SIDENAV_LINK.LABEL",
+                        "description": "APP.BROWSE.PERSONAL.SIDENAV_LINK.TOOLTIP",
+                        "route": "personal-files"
+                    },
+                    {
+                        "id": "app.navbar.libraries",
+                        "icon": "group_work",
+                        "title": "APP.BROWSE.LIBRARIES.SIDENAV_LINK.LABEL",
+                        "description": "APP.BROWSE.LIBRARIES.SIDENAV_LINK.TOOLTIP",
+                        "route": "libraries"
+                    }
+                ]
+            },
+            {
+                "id": "app.navbar.secondary",
+                "items": [
+                    {
+                        "id": "app.navbar.shared",
+                        "icon": "people",
+                        "title": "APP.BROWSE.SHARED.SIDENAV_LINK.LABEL",
+                        "description": "APP.BROWSE.SHARED.SIDENAV_LINK.TOOLTIP",
+                        "route": "shared"
+                    },
+                    {
+                        "id": "app.navbar.recentFiles",
+                        "icon": "schedule",
+                        "title": "APP.BROWSE.RECENT.SIDENAV_LINK.LABEL",
+                        "description": "APP.BROWSE.RECENT.SIDENAV_LINK.TOOLTIP",
+                        "route": "recent-files"
+                    },
+                    {
+                        "id": "app.navbar.favorites",
+                        "icon": "star",
+                        "title": "APP.BROWSE.FAVORITES.SIDENAV_LINK.LABEL",
+                        "description": "APP.BROWSE.FAVORITES.SIDENAV_LINK.TOOLTIP",
+                        "route": "favorites"
+                    },
+                    {
+                        "id": "app.navbar.trashcan",
+                        "icon": "delete",
+                        "title": "APP.BROWSE.TRASHCAN.SIDENAV_LINK.LABEL",
+                        "description": "APP.BROWSE.TRASHCAN.SIDENAV_LINK.TOOLTIP",
+                        "route": "trashcan"
+                    }
+                ]
+            }
+        ],
+        "content": {
+            "actions": [
+                {
+                    "id": "app.toolbar.separator.1",
+                    "order": 5,
+                    "type": "separator"
+                },
+                {
+                    "id": "app.toolbar.createFolder",
+                    "type": "button",
+                    "order": 10,
+                    "title": "APP.NEW_MENU.TOOLTIPS.CREATE_FOLDER",
+                    "icon": "create_new_folder",
+                    "actions": {
+                        "click": "app.actions.createFolder"
+                    },
+                    "rules": {
+                        "visible": "app.create.canCreateFolder"
+                    }
+                },
+                {
+                    "id": "app.toolbar.preview",
+                    "type": "button",
+                    "order": 15,
+                    "title": "APP.ACTIONS.VIEW",
+                    "icon": "open_in_browser",
+                    "actions": {
+                        "click": "app.actions.preview"
+                    },
+                    "rules": {
+                        "visible": "app.toolbar.canViewFile"
+                    }
+                },
+                {
+                    "id": "app.toolbar.download",
+                    "type": "button",
+                    "order": 20,
+                    "title": "APP.ACTIONS.DOWNLOAD",
+                    "icon": "get_app",
+                    "actions": {
+                        "click": "app.actions.download"
+                    },
+                    "rules": {
+                        "visible": "app.toolbar.canDownload"
+                    }
+                },
+                {
+                    "id": "app.toolbar.editFolder",
+                    "type": "button",
+                    "order": 30,
+                    "title": "APP.ACTIONS.EDIT",
+                    "icon": "create",
+                    "actions": {
+                        "click": "app.actions.editFolder"
+                    },
+                    "rules": {
+                        "visible": "app.toolbar.canEditFolder"
+                    }
+                },
+                {
+                    "id": "app.toolbar.separator.2",
+                    "order": 200,
+                    "type": "separator"
+                }
+            ]
+        }
+    }
+}
diff --git a/src/assets/plugins/.gitkeep b/src/assets/plugins/.gitkeep
new file mode 100644
index 000000000..e69de29bb
diff --git a/src/assets/plugins/plugin1.json b/src/assets/plugins/plugin1.json
new file mode 100644
index 000000000..184a657b4
--- /dev/null
+++ b/src/assets/plugins/plugin1.json
@@ -0,0 +1,66 @@
+{
+    "$schema": "../../../extension.schema.json",
+    "version": "1.0.0",
+    "name": "plugin1",
+    "description": "demo plugin",
+
+    "actions": [
+        {
+            "id": "plugin1.actions.settings",
+            "type": "NAVIGATE_URL",
+            "payload": "/settings"
+        },
+        {
+            "id": "plugin1.actions.info",
+            "type": "SNACKBAR_INFO",
+            "payload": "I'm a nice little popup raised by extension."
+        },
+        {
+            "id": "plugin1.actions.node-name",
+            "type": "SNACKBAR_INFO",
+            "payload": "$('Action for ' + context.selection.first.entry.name)"
+        }
+    ],
+
+    "features": {
+        "viewer": {
+            "openWith": [
+                {
+                    "id": "plugin1.viewer.openWith.action1",
+                    "type": "default",
+                    "icon": "build",
+                    "title": "Snackbar",
+                    "actions": {
+                        "click": "plugin1.actions.info"
+                    }
+                }
+            ]
+        },
+        "content": {
+            "actions": [
+                {
+                    "id": "plugin1.toolbar.menu1",
+                    "type": "menu",
+                    "icon": "storage",
+                    "order": 300,
+                    "children": [
+                        {
+                            "id": "plugin1.toolbar.menu1.settings",
+                            "type": "button",
+                            "title": "Settings",
+                            "icon": "settings_applications",
+                            "actions": {
+                                "click": "plugin1.actions.settings"
+                            }
+                        }
+                    ]
+                },
+                {
+                    "id": "plugin1.toolbar.separator3",
+                    "order": 301,
+                    "type": "separator"
+                }
+            ]
+        }
+    }
+}
diff --git a/src/assets/plugins/plugin2.json b/src/assets/plugins/plugin2.json
new file mode 100644
index 000000000..5bd71d37e
--- /dev/null
+++ b/src/assets/plugins/plugin2.json
@@ -0,0 +1,42 @@
+{
+    "$schema": "../../../extension.schema.json",
+    "version": "1.0.0",
+    "name": "plugin2",
+    "description": "demo plugin",
+
+    "routes": [
+        {
+            "id": "plugin2.routes.about",
+            "path": "ext/about",
+            "component": "app.components.about",
+            "data": {
+                "title": "Custom About"
+            }
+        }
+    ],
+
+    "features": {
+        "navbar": [
+            {
+                "id": "plugin2.navbar.group1",
+                "disabled": true,
+                "items": [
+                    {
+                        "id": "plugin2.navbar.group1.link1",
+                        "icon": "build",
+                        "title": "About (native)",
+                        "description": "Uses native application route",
+                        "route": "about"
+                    },
+                    {
+                        "id": "plugin2.navbar.group1.link2",
+                        "icon": "build",
+                        "title": "About (custom)",
+                        "description": "Uses custom defined route",
+                        "route": "plugin2.routes.about"
+                    }
+                ]
+            }
+        ]
+    }
+}
diff --git a/tslint.json b/tslint.json
index 12d8eaf91..70292c03c 100644
--- a/tslint.json
+++ b/tslint.json
@@ -69,7 +69,6 @@
     "no-trailing-whitespace": true,
     "no-unnecessary-initializer": true,
     "no-unused-expression": true,
-    "no-use-before-declare": true,
     "no-var-keyword": true,
     "object-literal-sort-keys": false,
     "one-line": [