diff --git a/README.md b/README.md
index 350f7b1d..aefd18c5 100644
--- a/README.md
+++ b/README.md
@@ -144,9 +144,9 @@ ReDoc makes use of the following [vendor extensions](http://swagger.io/specifica
 ## Advanced usage
 Instead of adding `spec-url` attribute to the `<redoc>` element you can initialize ReDoc via globally exposed `Redoc` object:
 ```js
-Redoc.init(specUrl, options)
+Redoc.init(specOrSpecUrl, options)
 ```
-
+`specOrSpecUrl` is either JSON object with specification or an URL to the spec in `JSON` or `YAML` format.
 `options` is javascript object with camel-cased version of `<redoc>` tag attribute names as the keys, e.g.:
 ```js
 Redoc.init('http://petstore.swagger.io/v2/swagger.json', {
diff --git a/lib/components/JsonSchema/json-schema.ts b/lib/components/JsonSchema/json-schema.ts
index bea59675..e514b79b 100644
--- a/lib/components/JsonSchema/json-schema.ts
+++ b/lib/components/JsonSchema/json-schema.ts
@@ -91,8 +91,8 @@ export class JsonSchema extends BaseSearchableComponent implements OnInit {
       }).sort((a, b) => {
         return enumOrder[a.name] > enumOrder[b.name] ? 1 : -1;
       });
-      this.descendants.forEach((d, idx) => d.idx = idx);
     }
+    this.descendants.forEach((d, idx) => d.idx = idx);
     this.selectDescendantByIdx(0);
   }
 
diff --git a/lib/components/Redoc/redoc.ts b/lib/components/Redoc/redoc.ts
index 6e89080f..db5e3cb5 100644
--- a/lib/components/Redoc/redoc.ts
+++ b/lib/components/Redoc/redoc.ts
@@ -15,7 +15,7 @@ import { BaseComponent } from '../base';
 import * as detectScollParent from 'scrollparent';
 
 import { SpecManager } from '../../utils/spec-manager';
-import { SearchService, OptionsService, Hash, AppStateService, SchemaHelper } from '../../services/';
+import { SearchService, OptionsService, Options, Hash, AppStateService, SchemaHelper } from '../../services/';
 import { LazyTasksService } from '../../shared/components/LazyFor/lazy-for';
 
 @Component({
@@ -29,7 +29,7 @@ export class Redoc extends BaseComponent implements OnInit {
 
   error: any;
   specLoaded: boolean;
-  options: any;
+  options: Options;
 
   loadingProgress: number;
 
@@ -84,7 +84,8 @@ export class Redoc extends BaseComponent implements OnInit {
   }
 
   load() {
-    this.specMgr.load(this.options.specUrl).catch(err => {
+    // bunlde spec directly if passsed or load by URL
+    this.specMgr.load(this.options.spec || this.options.specUrl).catch(err => {
       throw err;
     });
 
diff --git a/lib/index.ts b/lib/index.ts
index 163de55a..b1a27a1e 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -5,6 +5,7 @@ import { enableProdMode } from '@angular/core';
 import { Redoc } from './components/index';
 import { BrowserDomAdapter as DOM } from './utils/browser-adapter';
 import { disableDebugTools } from '@angular/platform-browser';
+import { isString } from './utils/helpers';
 
 var bootstrapRedoc;
 if (AOT) {
@@ -21,13 +22,16 @@ if (IS_PRODUCTION) {
 export const version = LIB_VERSION;
 
 var moduleRef;
-export function init(specUrl:string, options:any = {}) {
+export function init(specUrlOrSpec:string|any, options:any = {}) {
   if (moduleRef) {
     destroy();
   }
 
   Redoc._preOptions = options;
-  options.specUrl = options.specUrl || specUrl;
+  options.specUrl = options.specUrl || (isString(specUrlOrSpec) ? specUrlOrSpec : '');
+  if (!isString(specUrlOrSpec)) {
+    options.spec = specUrlOrSpec;
+  }
   return bootstrapRedoc()
   .then(appRef => {
     moduleRef = appRef;
diff --git a/lib/services/menu.service.ts b/lib/services/menu.service.ts
index d0f95144..f3248c4d 100644
--- a/lib/services/menu.service.ts
+++ b/lib/services/menu.service.ts
@@ -141,7 +141,7 @@ export class MenuService {
   onHashChange(hash?: string) {
     if (hash == undefined) return;
     let activated = this.activateByHash(hash);
-    if (!this.tasks.empty) {
+    if (!this.tasks.processed) {
       this.tasks.start(this.activeIdx, this);
       this.scrollService.setStickElement(this.getCurrentEl());
       if (activated) this.scrollToActive();
diff --git a/lib/services/options.service.ts b/lib/services/options.service.ts
index 268a43f5..1747efef 100644
--- a/lib/services/options.service.ts
+++ b/lib/services/options.service.ts
@@ -19,7 +19,7 @@ const OPTION_NAMES = new Set([
   'requiredPropsFirst'
 ]);
 
-interface Options {
+export interface Options {
   scrollYOffset?: any;
   disableLazySchemas?: boolean;
   specUrl?: string;
@@ -29,6 +29,7 @@ interface Options {
   expandResponses?: Set<string> | 'all';
   $scrollParent?: HTMLElement | Window;
   requiredPropsFirst?: boolean;
+  spec?: any;
 }
 
 @Injectable()
diff --git a/lib/services/schema-normalizer.service.ts b/lib/services/schema-normalizer.service.ts
index 433d03a8..4a3881e2 100644
--- a/lib/services/schema-normalizer.service.ts
+++ b/lib/services/schema-normalizer.service.ts
@@ -99,6 +99,7 @@ class SchemaWalker {
 export class AllOfMerger {
   static merge(into, schemas) {
     into['x-derived-from'] = [];
+    let hadDiscriminator = !!into.discriminator;
     for (let i=0; i < schemas.length; i++) {
       let subSchema = schemas[i];
       into['x-derived-from'].push(subSchema._pointer);
@@ -115,7 +116,7 @@ export class AllOfMerger {
       defaults(into, subSchema);
       subSchema._pointer = tmpPtr;
     }
-    into.discriminator = null;
+    if (!hadDiscriminator) into.discriminator = null;
     into.allOf = null;
   }
 
@@ -214,7 +215,8 @@ class SchemaDereferencer {
     // if resolved schema doesn't have title use name from ref
     resolved.title = resolved.title || JsonPointer.baseName($ref);
 
-    let keysCount = Object.keys(schema).length;
+    let keysCount = Object.keys(schema).filter(key => !key.startsWith('x-redoc')).length;
+
     if ( keysCount > 2 || (keysCount === 2 && !schema.description) ) {
       WarningsService.warn(`Other properties are defined at the same level as $ref at "#${pointer}". ` +
         'They are IGNORED according to the JsonSchema spec');
diff --git a/lib/services/search.service.ts b/lib/services/search.service.ts
index 93b90055..a1f70cd9 100644
--- a/lib/services/search.service.ts
+++ b/lib/services/search.service.ts
@@ -186,10 +186,13 @@ export class SearchService {
     let title = name;
     schema = this.normalizer.normalize(schema, schema._pointer || absolutePointer, { childFor: parent });
 
+    // prevent endless discriminator recursion
+    if (schema._pointer && schema._pointer === parent) return;
+
     let body = schema.description;  // TODO: defaults, examples, etc...
 
     if (schema.type === 'array') {
-      this.indexSchema(schema.items, title, JsonPointer.join(absolutePointer, ['items']), menuPointer);
+      this.indexSchema(schema.items, title, JsonPointer.join(absolutePointer, ['items']), menuPointer, parent);
       return;
     }
 
@@ -205,20 +208,18 @@ export class SearchService {
       body += ' ' + schema.enum.join(' ');
     }
 
-    if (!parent) {
-      // redoc doesn't display top level descriptions and titles
-      this.index({
-        pointer: absolutePointer,
-        menuId: menuPointer,
-        title,
-        body
-      });
-    }
+    this.index({
+      pointer: absolutePointer,
+      menuId: menuPointer,
+      title,
+      body
+    });
 
     if (schema.properties) {
       Object.keys(schema.properties).forEach(propName => {
         let propPtr = JsonPointer.join(absolutePointer, ['properties', propName]);
-        this.indexSchema(schema.properties[propName], propName, propPtr, menuPointer);
+        let prop:SwaggerSchema = schema.properties[propName];
+        this.indexSchema(prop, propName, propPtr, menuPointer, parent);
       });
     }
   }
diff --git a/lib/shared/components/CopyButton/copy-button.directive.ts b/lib/shared/components/CopyButton/copy-button.directive.ts
index bf57bc1c..6cd7810c 100644
--- a/lib/shared/components/CopyButton/copy-button.directive.ts
+++ b/lib/shared/components/CopyButton/copy-button.directive.ts
@@ -27,7 +27,7 @@ export class CopyButton implements OnInit {
   onClick() {
     let copied;
     if (this.copyText) {
-      copied = Clipboard.copyCustom(JSON.stringify(this.copyText));
+      copied = Clipboard.copyCustom(JSON.stringify(this.copyText, null, 2));
     } else {
       copied = Clipboard.copyElement(this.copyElement);
     }
diff --git a/lib/shared/components/LazyFor/lazy-for.ts b/lib/shared/components/LazyFor/lazy-for.ts
index 94019cf8..772ba8ca 100644
--- a/lib/shared/components/LazyFor/lazy-for.ts
+++ b/lib/shared/components/LazyFor/lazy-for.ts
@@ -31,6 +31,7 @@ export class LazyTasksService {
   private _tasks = [];
   private _current: number = 0;
   private _syncCount: number = 0;
+  private _emptyProcessed = false;
   private menuService;
 
   public loadProgress = new BehaviorSubject<number>(0);
@@ -38,8 +39,10 @@ export class LazyTasksService {
   constructor(public optionsService: OptionsService) {
   }
 
-  get empty() {
-    return this._current === this._tasks.length;
+  get processed() {
+    let res = this._tasks.length && (this._current >= this._tasks.length) || this._emptyProcessed;
+    if (!this._tasks.length) this._emptyProcessed = true;
+    return res;
   }
 
   set syncCount(n: number) {
@@ -97,10 +100,17 @@ export class LazyTasksService {
     } else {
       this.sortTasks(idx);
     }
+    syncCount = Math.min(syncCount, this._tasks.length);
     if (this.allSync) syncCount = this._tasks.length;
     for (var i = this._current; i < syncCount; i++) {
       this.nextTaskSync();
     }
+
+    if (!this._tasks.length) {
+      this.loadProgress.next(100);
+      return;
+    }
+
     this.nextTask();
   }
 }
diff --git a/lib/utils/helpers.ts b/lib/utils/helpers.ts
index 86fcc839..ae9a3674 100644
--- a/lib/utils/helpers.ts
+++ b/lib/utils/helpers.ts
@@ -8,7 +8,7 @@ export function stringify(obj:any) {
   return JSON.stringify(obj);
 }
 
-export function isString(str:any) {
+export function isString(str:any):str is String {
   return typeof str === 'string';
 }
 
diff --git a/lib/utils/spec-manager.ts b/lib/utils/spec-manager.ts
index 379f624a..6f379d24 100644
--- a/lib/utils/spec-manager.ts
+++ b/lib/utils/spec-manager.ts
@@ -9,6 +9,7 @@ import { MdRenderer } from './md-renderer';
 
 import { SwaggerOperation, SwaggerParameter } from './swagger-typings';
 import { snapshot } from './helpers';
+import { WarningsService } from '../services/warnings.service';
 
 function getDiscriminator(obj) {
   return obj.discriminator || obj['x-extendedDiscriminator'];
@@ -181,7 +182,37 @@ export class SpecManager {
 
     let globalDefs = this._schema.definitions || {};
     let res:DescendantInfo[] = [];
+
+
+    // from the spec: When used, the value MUST be the name of this schema or any schema that inherits it.
+    // but most of people use it as an abstract class so here is workaround to allow using it other way
+    // check if parent definition name is in the enum of possible values
+    if (definition.discriminator) {
+      let prop = definition.properties[definition.discriminator];
+      if (prop.enum && prop.enum.indexOf(JsonPointer.baseName(defPointer)) > -1) {
+        res.push({
+          name: JsonPointer.baseName(defPointer),
+          $ref: defPointer
+        });
+      }
+    }
+
     let extendedDiscriminatorProp = definition['x-extendedDiscriminator'];
+
+    let pointers;
+    if (definition['x-derived-from']) {
+      // support inherited discriminator o_O
+      let derivedDiscriminator = definition['x-derived-from'].filter(ptr => {
+        if (!ptr) return false;
+        let def = this.byPointer(ptr);
+        return def && def.discriminator;
+      });
+      pointers = [defPointer, ...derivedDiscriminator];
+    } else {
+      pointers = [defPointer];
+    }
+
+
     for (let defName of Object.keys(globalDefs)) {
       let def = globalDefs[defName];
       if (!def.allOf &&
@@ -189,12 +220,6 @@ export class SpecManager {
       let subTypes = def['x-derived-from'] ||
         def.allOf.map(subType => subType._pointer || subType.$ref);
 
-      let pointers;
-      if (definition['x-derived-from']) {
-        pointers = [defPointer, ...definition['x-derived-from']];
-      } else {
-        pointers = [defPointer];
-      }
       let idx = -1;
 
       for (let ptr of pointers) {
@@ -204,12 +229,23 @@ export class SpecManager {
 
       if (idx < 0) continue;
 
-      let derivedName = defName;
+      let derivedName;
       if (extendedDiscriminatorProp) {
-        let prop = def.properties && def.properties[extendedDiscriminatorProp];
-        if (prop && prop.enum && prop.enum.length === 1) {
-          derivedName = prop.enum[0];
+        let subDefs = def.allOf || [];
+        for (let def of subDefs) {
+          let prop = def.properties && def.properties[extendedDiscriminatorProp];
+          if (prop && prop.enum && prop.enum.length === 1) {
+            derivedName = prop.enum[0];
+            break;
+          }
         }
+        if (derivedName == undefined) {
+          WarningsService.warn(`Incorrect usage of x-extendedDiscriminator at ${defPointer}: `
+            + `can't find corresponding enum with single value in definition "${defName}"`);
+          continue;
+        }
+      } else {
+        derivedName = defName;
       }
 
       res.push({name: derivedName, $ref: `#/definitions/${defName}`});
diff --git a/manual-types/index.d.ts b/manual-types/index.d.ts
index 1a39435e..ba8e22db 100644
--- a/manual-types/index.d.ts
+++ b/manual-types/index.d.ts
@@ -13,6 +13,11 @@ declare module "*.css" {
   export default content;
 }
 
+declare module "*.json" {
+  const content: string;
+  export default content;
+}
+
 declare var LIB_VERSION: any;
 declare var IS_PRODUCTION: any;
 declare var AOT: any;
diff --git a/package.json b/package.json
index d6153aa0..b3746589 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "redoc",
   "description": "Swagger-generated API Reference Documentation",
-  "version": "1.10.2",
+  "version": "1.11.0",
   "repository": {
     "type": "git",
     "url": "git://github.com/Rebilly/ReDoc"
diff --git a/tests/unit/SpecManager.spec.ts b/tests/unit/SpecManager.spec.ts
index f79e1409..ec128788 100644
--- a/tests/unit/SpecManager.spec.ts
+++ b/tests/unit/SpecManager.spec.ts
@@ -1,6 +1,8 @@
 'use strict';
 
 import { SpecManager } from '../../lib/utils/spec-manager';
+import * as xExtendedDefs from './x-extended-defs.json';
+
 describe('Utils', () => {
   describe('Schema manager', () => {
     let specMgr: SpecManager;
@@ -175,6 +177,23 @@ describe('Utils', () => {
         deriveDefs.should.be.instanceof(Array);
         deriveDefs.should.be.empty();
       });
+
+      it('should correctly work with x-extendedDiscriminator', () => {
+        specMgr._schema = {
+          definitions: xExtendedDefs
+        };
+
+        let deriveDefs = specMgr.findDerivedDefinitions('#/definitions/Payment');
+        deriveDefs.should.be.instanceof(Array);
+        deriveDefs.should.be.deepEqual([
+          {
+            name: 'cash',
+            $ref: '#/definitions/CashPayment'
+          }, {
+            name: 'paypal',
+            $ref: '#/definitions/PayPalPayment'
+        }])
+      });
     });
   });
 });
diff --git a/tests/unit/x-extended-defs.json b/tests/unit/x-extended-defs.json
new file mode 100644
index 00000000..b0d487ea
--- /dev/null
+++ b/tests/unit/x-extended-defs.json
@@ -0,0 +1,57 @@
+{
+  "Payment": {
+    "x-extendedDiscriminator": "type",
+    "type": "object",
+    "required": [
+      "type"
+    ],
+    "properties": {
+      "type": {
+        "type": "string"
+      },
+      "name": {
+        "type": "string"
+      }
+    }
+  },
+  "CashPayment": {
+    "allOf": [
+      {
+        "$ref": "#/definitions/Payment"
+      },
+      {
+        "properties": {
+          "type": {
+            "type": "string",
+            "enum": [
+              "cash"
+            ]
+          },
+          "currency": {
+            "type": "string"
+          }
+        }
+      }
+    ]
+  },
+  "PayPalPayment": {
+    "allOf": [
+      {
+        "$ref": "#/definitions/Payment"
+      },
+      {
+        "properties": {
+          "type": {
+            "type": "string",
+            "enum": [
+              "paypal"
+            ]
+          },
+          "userEmail": {
+            "type": "string"
+          }
+        }
+      }
+    ]
+  }
+}