diff --git a/src/common/common.types.ts b/src/common/common.types.ts
index 89dc2be..7cae212 100644
--- a/src/common/common.types.ts
+++ b/src/common/common.types.ts
@@ -1,4 +1,3 @@
-import { Link } from "../models/Link.model";
 import {ASObject} from "../models/asObject/ASObject.model";
 
 export enum ASModelType {
@@ -29,6 +28,8 @@ export type Relationship = 'placeholder';
 export type Tombstone = 'placeholder';
 export type Video = 'placeholder';
 export type Mention = 'placeholder';
+export type Link = 'placeholder';
+export type Collection = 'placeholder';
 export type AnyASObject = ASObject | Article | Audio | Document | Event | Image | Note | Page | Place | Profile | Relationship | Tombstone | Video;
 export type DateTime = string;
 export type Duration = string;
@@ -44,6 +45,7 @@ export type ToValue = string | AnyASObject | Link;
 export type BtoValue = string | AnyASObject | Link;
 export type CcValue = string | AnyASObject | Link;
 export type BccValue = string | AnyASObject | Link;
+export type GeneratorValue = string | ASObject | Link;
 export type ObjectValue = string | AnyASObject | Link;
 export type AttributedToValue = string | AnyASObject | Link | Mention;
 export type TagValue = string | AnyASObject | Link | Mention;
diff --git a/src/models/ASBase.model.ts b/src/models/ASBase.model.ts
index 51ecd00..d7cb0f5 100644
--- a/src/models/ASBase.model.ts
+++ b/src/models/ASBase.model.ts
@@ -11,10 +11,9 @@ export interface ModelBaseAPWithContext {
 export class ASBase<T> {
     public fields: T & ModelBaseAPWithContext;
 
-    constructor(type: string, fields: T) {
+    constructor(fields: T) {
         // TODO: make recursive copy
         this.fields = {
-            type,
             ...fields,
         } as T & ModelBaseAPWithContext;
     }
diff --git a/src/models/ASCollectionBase.model.ts b/src/models/ASCollectionBase.model.ts
deleted file mode 100644
index b180cbd..0000000
--- a/src/models/ASCollectionBase.model.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import { ASObject, ASObjectFields } from "./asObject/ASObject.model";
-
-// TODO: types
-// https://www.w3.org/TR/activitystreams-core/#collection
-export interface ASCollectionBaseFields extends ASObjectFields {
-    totalItems?: any;
-    first?: any;
-    last?: any;
-    current?: any;
-}
-
-export class ASCollectionBase extends ASObject {
-    constructor(fields: ASCollectionBaseFields) {
-        super(fields);
-    }
-}
\ No newline at end of file
diff --git a/src/models/Actor.model.ts b/src/models/Actor.model.ts
deleted file mode 100644
index c8a4c51..0000000
--- a/src/models/Actor.model.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import {ASBase} from "./ASBase.model";
-import {ASObjectFields} from "./asObject/ASObject.model";
-
-export enum ActorTypes {
-    Application = 'Application',
-    Group = 'Group',
-    Organization = 'Organization',
-    Person = 'Person',
-    Service = 'Service'
-}
-
-// TODO: types
-// https://www.w3.org/TR/activitystreams-core/#actors
-export interface ActorFields extends ASObjectFields {
-    type?: any | ActorTypes; // ?
-}
-
-export class Actor extends ASBase<ActorFields>{
-    constructor(fields: ActorFields) {
-        super(fields);
-    }
-}
\ No newline at end of file
diff --git a/src/models/Collection.model.ts b/src/models/Collection.model.ts
deleted file mode 100644
index 62215f0..0000000
--- a/src/models/Collection.model.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import {ASCollectionBase, ASCollectionBaseFields} from "./ASCollectionBase.model";
-
-// TODO: types
-// https://www.w3.org/TR/activitystreams-core/#collection
-export interface CollectionFields extends ASCollectionBaseFields {
-    items?: any; // Objects? Links?
-}
-
-export class Collection extends ASCollectionBase {
-    constructor(fields: CollectionFields) {
-        super(fields);
-    }
-}
\ No newline at end of file
diff --git a/src/models/CollectionPage.model.ts b/src/models/CollectionPage.model.ts
deleted file mode 100644
index 9600804..0000000
--- a/src/models/CollectionPage.model.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import {ASCollectionBase, ASCollectionBaseFields} from "./ASCollectionBase.model";
-
-// TODO: types
-// https://www.w3.org/TR/activitystreams-core/#collection
-export interface CollectionPageFields extends ASCollectionBaseFields {
-    partOf?: any;
-    first?: any;
-    next?: any;
-    prev?: any;
-    last?: any;
-    current?: any;
-}
-
-export class CollectionPage extends ASCollectionBase {
-    constructor(fields: CollectionPageFields) {
-        super(fields);
-    }
-}
\ No newline at end of file
diff --git a/src/models/OrderedCollection.model.ts b/src/models/OrderedCollection.model.ts
deleted file mode 100644
index da2b291..0000000
--- a/src/models/OrderedCollection.model.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import {ASCollectionBase, ASCollectionBaseFields} from "./ASCollectionBase.model";
-
-// TODO: types
-// https://www.w3.org/TR/activitystreams-core/#collection
-export interface OrderedCollectionFields extends ASCollectionBaseFields {
-    orderedItems?: any; // Objects? Links?
-}
-
-// TODO: sort method?
-export class OrderedCollection extends ASCollectionBase {
-    constructor(fields: OrderedCollectionFields) {
-        super(fields);
-    }
-}
\ No newline at end of file
diff --git a/src/models/OrderedCollectionPage.model.ts b/src/models/OrderedCollectionPage.model.ts
deleted file mode 100644
index 8df62c9..0000000
--- a/src/models/OrderedCollectionPage.model.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import {CollectionPage, CollectionPageFields} from "./CollectionPage.model";
-
-// TODO: types
-// TODO: is it correct?
-// https://www.w3.org/TR/activitystreams-core/#collection
-export interface OrderedCollectionPageFields extends CollectionPageFields {
-    startIndex?: any;
-}
-
-export class OrderedCollectionPage extends CollectionPage {
-    constructor(fields: OrderedCollectionPageFields) {
-        super(fields);
-    }
-}
\ No newline at end of file
diff --git a/src/models/activity/Activity.model.ts b/src/models/activity/Activity.model.ts
index 4a7e6b7..e2e5c8b 100644
--- a/src/models/activity/Activity.model.ts
+++ b/src/models/activity/Activity.model.ts
@@ -12,6 +12,9 @@ import {ASModelType} from "../../common/common.types";
  */
 export class Activity extends ASBase<ActivityFields>{
     constructor(fields: ActivityFields) {
-        super(ASModelType.Activity, fields);
+        super({
+            type: ASModelType.Activity,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/application/Application.model.ts b/src/models/application/Application.model.ts
index 5785a09..3721d25 100644
--- a/src/models/application/Application.model.ts
+++ b/src/models/application/Application.model.ts
@@ -9,6 +9,9 @@ import {ApplicationFields} from "./Application.types";
  */
 export class Application extends ASBase<ApplicationFields>{
     constructor(fields: ApplicationFields) {
-        super(ASModelType.Application, fields);
+        super({
+            type: ASModelType.Application,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/article/Article.model.ts b/src/models/article/Article.model.ts
index 250f042..cefcef3 100644
--- a/src/models/article/Article.model.ts
+++ b/src/models/article/Article.model.ts
@@ -9,6 +9,9 @@ import {ArticleFields} from "./Article.types";
  */
 export class Article extends ASBase<ArticleFields>{
     constructor(fields: ArticleFields) {
-        super(ASModelType.Article, fields);
+        super({
+            type: ASModelType.Article,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/asEvent/ASEvent.model.ts b/src/models/asEvent/ASEvent.model.ts
index f87d6de..ec6b66f 100644
--- a/src/models/asEvent/ASEvent.model.ts
+++ b/src/models/asEvent/ASEvent.model.ts
@@ -9,6 +9,9 @@ import {ASEventFields} from "./ASEvent.types";
  */
 export class ASEvent extends ASBase<ASEventFields>{
     constructor(fields: ASEventFields) {
-        super(ASModelType.Event, fields);
+        super({
+            type: ASModelType.Event,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/asObject/ASObject.model.ts b/src/models/asObject/ASObject.model.ts
index b6c10ad..d26a657 100644
--- a/src/models/asObject/ASObject.model.ts
+++ b/src/models/asObject/ASObject.model.ts
@@ -11,6 +11,9 @@ import {ASModelType} from "../../common/common.types";
  */
 export class ASObject extends ASBase<ASObjectFields>{
     constructor(fields: ASObjectFields) {
-        super(ASModelType.Object, fields);
+        super({
+            type: ASModelType.Object,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/asObject/ASObject.types.ts b/src/models/asObject/ASObject.types.ts
index 615e6dd..f518982 100644
--- a/src/models/asObject/ASObject.types.ts
+++ b/src/models/asObject/ASObject.types.ts
@@ -1,6 +1,3 @@
-import {Link} from "../Link.model";
-import {Collection} from "../Collection.model";
-import { ASObject } from "./ASObject.model";
 import {
     DateTime,
     Duration,
@@ -18,10 +15,10 @@ import {
     BccValue,
     AttributedToValue,
     TagValue,
+    GeneratorValue,
+    Collection,
 } from "../../common/common.types";
 
-// TODO: types
-// https://www.w3.org/TR/activitystreams-core/#object
 export interface ASObjectFields {
     /**
      * Provides the globally unique identifier for
@@ -158,7 +155,7 @@ export interface ASObjectFields {
      *
      * {@link https://www.w3.org/ns/activitystreams#generator Docs}
      */
-    generator?: (string | ASObject | Link);
+    generator?: GeneratorValue;
 
     /**
      * Indicates an entity (or entities) that describes an icon for this object.
diff --git a/src/models/document/Document.model.ts b/src/models/document/Document.model.ts
index 1957303..0939f0b 100644
--- a/src/models/document/Document.model.ts
+++ b/src/models/document/Document.model.ts
@@ -9,6 +9,9 @@ import {DocumentFields} from "./Document.types";
  */
 export class Document extends ASBase<DocumentFields>{
     constructor(fields: DocumentFields) {
-        super(ASModelType.Document, fields);
+        super({
+            type: ASModelType.Document,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/group/Group.model.ts b/src/models/group/Group.model.ts
index 995de73..b1f0602 100644
--- a/src/models/group/Group.model.ts
+++ b/src/models/group/Group.model.ts
@@ -9,6 +9,9 @@ import {GroupFields} from "./Group.types";
  */
 export class Group extends ASBase<GroupFields>{
     constructor(fields: GroupFields) {
-        super(ASModelType.Group, fields);
+        super({
+            type: ASModelType.Group,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/intransitiveActivity/IntransitiveActivity.model.ts b/src/models/intransitiveActivity/IntransitiveActivity.model.ts
index 0394637..0688a8d 100644
--- a/src/models/intransitiveActivity/IntransitiveActivity.model.ts
+++ b/src/models/intransitiveActivity/IntransitiveActivity.model.ts
@@ -11,6 +11,9 @@ import {ASModelType} from "../../common/common.types";
  */
 export class IntransitiveActivity extends ASBase<IntransitiveActivityFields>{
     constructor(fields: IntransitiveActivityFields) {
-        super(ASModelType.Activity, fields);
+        super({
+            type: ASModelType.Activity,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/note/Note.model.ts b/src/models/note/Note.model.ts
index 8a25c81..a1fd475 100644
--- a/src/models/note/Note.model.ts
+++ b/src/models/note/Note.model.ts
@@ -9,6 +9,9 @@ import {NoteFields} from "./Note.types";
  */
 export class Note extends ASBase<NoteFields>{
     constructor(fields: NoteFields) {
-        super(ASModelType.Note, fields);
+        super({
+            type: ASModelType.Note,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/organization/Organization.model.ts b/src/models/organization/Organization.model.ts
index 6774f1e..b454862 100644
--- a/src/models/organization/Organization.model.ts
+++ b/src/models/organization/Organization.model.ts
@@ -9,6 +9,9 @@ import {OrganizationFields} from "./Organization.types";
  */
 export class Organization extends ASBase<OrganizationFields>{
     constructor(fields: OrganizationFields) {
-        super(ASModelType.Organization, fields);
+        super({
+            type: ASModelType.Organization,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/person/Person.model.ts b/src/models/person/Person.model.ts
index e89fcd9..0781df4 100644
--- a/src/models/person/Person.model.ts
+++ b/src/models/person/Person.model.ts
@@ -9,6 +9,9 @@ import {PersonFields} from "./Person.types";
  */
 export class Person extends ASBase<PersonFields>{
     constructor(fields: PersonFields) {
-        super(ASModelType.Person, fields);
+        super({
+            type: ASModelType.Person,
+            ...fields
+        })
     }
 }
\ No newline at end of file
diff --git a/src/models/service/Service.model.ts b/src/models/service/Service.model.ts
index cbef18d..52147a8 100644
--- a/src/models/service/Service.model.ts
+++ b/src/models/service/Service.model.ts
@@ -9,6 +9,9 @@ import {ServiceFields} from "./Service.types";
  */
 export class Service extends ASBase<ServiceFields>{
     constructor(fields: ServiceFields) {
-        super(ASModelType.Article, fields);
+        super({
+            type: ASModelType.Service,
+            ...fields
+        })
     }
 }
\ No newline at end of file