diff --git a/models/core/src/core.ts b/models/core/src/core.ts
index 532d4c7366..1de84914cd 100644
--- a/models/core/src/core.ts
+++ b/models/core/src/core.ts
@@ -62,8 +62,8 @@ export class TAttribute extends TDoc implements AnyAttribute {
   label!: IntlString
 }
 
-@Model(core.class.Type, core.class.Doc)
-export class TType extends TDoc implements Type<any> {
+@Model(core.class.Type, core.class.Obj)
+export class TType extends TObj implements Type<any> {
   label!: IntlString
 }
 
diff --git a/models/core/src/security.ts b/models/core/src/security.ts
index 16772ee23d..2ff043681a 100644
--- a/models/core/src/security.ts
+++ b/models/core/src/security.ts
@@ -15,7 +15,7 @@
 
 import type { Account, Arr, Domain, Ref, Space, State } from '@anticrm/core'
 import { DOMAIN_MODEL } from '@anticrm/core'
-import { Implements, Model, Prop, TypeBoolean, TypeState, TypeString } from '@anticrm/model'
+import { Implements, Model, Prop, TypeBoolean, TypeRef, TypeString } from '@anticrm/model'
 import type { IntlString } from '@anticrm/platform'
 import core from './component'
 import { TDoc } from './core'
@@ -53,7 +53,7 @@ export class TState extends TDoc implements State {
 
 @Implements(core.interface.DocWithState)
 export class TDocWithState extends TDoc {
-  @Prop(TypeState(), 'State' as IntlString)
+  @Prop(TypeRef(core.class.State), 'State' as IntlString)
   state!: Ref<State>
 
   @Prop(TypeString(), 'No.' as IntlString)
diff --git a/models/recruit/package.json b/models/recruit/package.json
index 8222f0ce42..12c3445a6d 100644
--- a/models/recruit/package.json
+++ b/models/recruit/package.json
@@ -38,7 +38,6 @@
     "@anticrm/recruit-resources": "~0.6.0",
     "@anticrm/chunter": "~0.6.0",
     "@anticrm/model-chunter": "~0.6.0",
-    "@anticrm/view": "~0.6.0",
-    "@anticrm/activity": "~0.6.0"
+    "@anticrm/view": "~0.6.0"
   }
 }
diff --git a/models/recruit/src/index.ts b/models/recruit/src/index.ts
index 26c61fd47a..48dc81d937 100644
--- a/models/recruit/src/index.ts
+++ b/models/recruit/src/index.ts
@@ -13,10 +13,9 @@
 // limitations under the License.
 //
 
-import activity from '@anticrm/activity'
 import type { Employee } from '@anticrm/contact'
 import type { Doc, Domain, FindOptions, Ref, Timestamp } from '@anticrm/core'
-import { Builder, Model, Prop, TypeBoolean, TypeDate, TypeString, UX } from '@anticrm/model'
+import { Builder, Model, Prop, TypeBoolean, TypeDate, TypeRef, TypeString, UX } from '@anticrm/model'
 import chunter from '@anticrm/model-chunter'
 import contact, { TPerson } from '@anticrm/model-contact'
 import core, { TAttachedDoc, TDocWithState, TSpace, TSpaceWithStates } from '@anticrm/model-core'
@@ -80,7 +79,7 @@ export class TCandidate extends TPerson implements Candidate {
 @UX('Application' as IntlString, recruit.icon.RecruitApplication, 'APP' as IntlString)
 export class TApplicant extends TAttachedDoc implements Applicant {
   // We need to declare, to provide property with label
-  @Prop(TypeString(), 'Candidate' as IntlString)
+  @Prop(TypeRef(recruit.class.Candidate), 'Candidate' as IntlString)
   declare attachedTo: Ref<Candidate>
 
   @Prop(TypeString(), 'Attachments' as IntlString)
@@ -89,8 +88,8 @@ export class TApplicant extends TAttachedDoc implements Applicant {
   @Prop(TypeString(), 'Comments' as IntlString)
   comments?: number
 
-  @Prop(TypeString(), 'Assigned recruiter' as IntlString)
-  employee!: Ref<Employee>
+  @Prop(TypeRef(contact.class.Employee), 'Assigned recruiter' as IntlString)
+  employee!: Ref<Employee> | null
 
   // We need this two to make typescript happy.
   declare state: TDocWithState['state']
@@ -228,14 +227,6 @@ export function createModel (builder: Builder): void {
     attachedTo: recruit.class.Applicant,
     sequence: 0
   })
-
-  builder.createDoc(activity.class.TxViewlet, core.space.Model, {
-    objectClass: recruit.class.Applicant,
-    icon: recruit.icon.RecruitApplication,
-    txClass: core.class.TxUpdateDoc,
-    component: recruit.activity.TxApplicantUpdate,
-    display: 'inline'
-  }, recruit.ids.TxApplicantUpdate)
 }
 
 export { default } from './plugin'
diff --git a/models/recruit/src/plugin.ts b/models/recruit/src/plugin.ts
index be7e39d7e2..081d61b318 100644
--- a/models/recruit/src/plugin.ts
+++ b/models/recruit/src/plugin.ts
@@ -13,14 +13,13 @@
 // limitations under the License.
 //
 
-import { mergeIds } from '@anticrm/platform'
+import type { Doc, Ref, Space } from '@anticrm/core'
 import type { IntlString, Resource } from '@anticrm/platform'
-import type { Ref, Space, Doc } from '@anticrm/core'
-import type { AnyComponent } from '@anticrm/ui'
-import type { Action } from '@anticrm/view'
+import { mergeIds } from '@anticrm/platform'
 import { recruitId } from '@anticrm/recruit'
 import recruit from '@anticrm/recruit-resources/src/plugin'
-import { TxViewlet } from '@anticrm/activity'
+import type { AnyComponent } from '@anticrm/ui'
+import type { Action } from '@anticrm/view'
 
 export default mergeIds(recruitId, recruit, {
   action: {
@@ -48,11 +47,5 @@ export default mergeIds(recruitId, recruit, {
   },
   space: {
     CandidatesPublic: '' as Ref<Space>
-  },
-  ids: {
-    TxApplicantUpdate: '' as Ref<TxViewlet>
-  },
-  activity: {
-    TxApplicantUpdate: '' as AnyComponent
   }
 })
diff --git a/models/task/src/index.ts b/models/task/src/index.ts
index 3701a6b4fb..335f20e684 100644
--- a/models/task/src/index.ts
+++ b/models/task/src/index.ts
@@ -16,7 +16,7 @@
 import type { Employee } from '@anticrm/contact'
 import contact from '@anticrm/contact'
 import type { Doc, DocWithState, Domain, FindOptions, Ref } from '@anticrm/core'
-import { Builder, Model, Prop, TypeString, UX } from '@anticrm/model'
+import { Builder, Model, Prop, TypeRef, TypeString, UX } from '@anticrm/model'
 import chunter from '@anticrm/model-chunter'
 import core, { TDoc, TSpaceWithStates } from '@anticrm/model-core'
 import view from '@anticrm/model-view'
@@ -42,8 +42,8 @@ export class TTask extends TDoc implements Task {
   @Prop(TypeString(), 'Description' as IntlString)
   description!: string
 
-  @Prop(TypeString(), 'Assignee' as IntlString)
-  assignee!: Ref<Employee>
+  @Prop(TypeRef(contact.class.Employee), 'Assignee' as IntlString)
+  assignee!: Ref<Employee> | null
 
   @Prop(TypeString(), 'Comments' as IntlString)
   comments!: number
diff --git a/packages/core/src/memdb.ts b/packages/core/src/memdb.ts
index 046114a26c..19bfcbb51d 100644
--- a/packages/core/src/memdb.ts
+++ b/packages/core/src/memdb.ts
@@ -84,7 +84,7 @@ export abstract class MemDb extends TxProcessor {
       const result: LookupData<T> = {}
       for (const key in lookup) {
         const id = (doc as any)[key] as Ref<Doc>
-        if (id !== undefined) {
+        if (id != null) {
           (result as any)[key] = this.getObject(id)
         }
       }
diff --git a/packages/model/src/dsl.ts b/packages/model/src/dsl.ts
index c09e9fcd3a..214e0e0da5 100644
--- a/packages/model/src/dsl.ts
+++ b/packages/model/src/dsl.ts
@@ -308,8 +308,8 @@ export function TypeDate (): Type<string> {
 /**
  * @public
  */
-export function TypeState (): Type<string> {
-  return { _class: core.class.State, label: 'TypeState' as IntlString }
+export function TypeRef (_class: Ref<Class<Doc>>): Type<string> {
+  return { _class: _class, label: 'TypeRef' as IntlString }
 }
 
 /**
diff --git a/packages/presentation/src/components/AttributeBarEditor.svelte b/packages/presentation/src/components/AttributeBarEditor.svelte
index e31f99d9e9..0261e7bd62 100644
--- a/packages/presentation/src/components/AttributeBarEditor.svelte
+++ b/packages/presentation/src/components/AttributeBarEditor.svelte
@@ -15,12 +15,13 @@
 -->
 
 <script lang="ts">
-  import type { Ref, Class, Doc } from '@anticrm/core'
+  import type { AttachedDoc, AttachedDoc, Doc } from '@anticrm/core'
+  import core from '@anticrm/core'
   import { getResource } from '@anticrm/platform'
   import type { AnySvelteComponent } from '@anticrm/ui'
   import { CircleButton, Label } from '@anticrm/ui'
-  import { getClient } from '../utils'
   import view from '@anticrm/view'
+  import { getClient } from '../utils'
 
   // export let _class: Ref<Class<Doc>>
   export let key: string
@@ -45,8 +46,13 @@
     editor = getResource(editorMixin.editor)
   }
 
-  function onChange(value: any) {
-    client.updateDoc(_class, object.space, object._id, { [key]: value }, true).then(result => console.log('UPDATE RESULT', result))
+  function onChange (value: any) {
+    if (client.getHierarchy().isDerived(object._class, core.class.AttachedDoc)) {
+      const adoc = object as AttachedDoc
+      client.updateCollection(_class, object.space, adoc._id, adoc.attachedTo, adoc.attachedToClass, adoc.collection, { [key]: value })
+    } else {
+      client.updateDoc(_class, object.space, object._id, { [key]: value }, true)
+    }
   }
 </script>
 
diff --git a/packages/presentation/src/components/UserBox.svelte b/packages/presentation/src/components/UserBox.svelte
index fafbb54dae..33db11e08e 100644
--- a/packages/presentation/src/components/UserBox.svelte
+++ b/packages/presentation/src/components/UserBox.svelte
@@ -29,8 +29,11 @@
   export let _class: Ref<Class<Person>>
   export let title: IntlString
   export let caption: IntlString
-  export let value: Ref<Person>
+  export let value: Ref<Person> | null | undefined
   export let show: boolean = false
+  export let allowDeselect = false
+  export let titleDeselect: IntlString | undefined = undefined
+  
   const dispatch = createEventDispatcher()
 
   let selected: Person | undefined
@@ -40,11 +43,13 @@
 
   const client = getClient()
 
-  async function updateSelected(value: Ref<Person>) {
+  async function updateSelected (value: Ref<Person>) {
     selected = await client.findOne(_class, { _id: value })
   }
 
-  $: updateSelected(value)
+  $: if (value != null) {
+    updateSelected(value)
+  }
 
   onMount(() => {
     if (btn && show) {
@@ -59,10 +64,19 @@
     btn.focus()
     if (!opened) {
       opened = true
-      showPopup(UsersPopup, { _class, title, caption }, container, (result) => {
-        if (result) { 
+      showPopup(UsersPopup, { _class, title, caption, allowDeselect, selected: value, titleDeselect }, container, (result) => {
+        if (result === undefined) {
+          // Value is not changed.
+          opened = false
+          return
+        }
+        if (result != null) {
           value = result._id
           dispatch('change', value)
+        } else {
+          value = null
+          selected = undefined
+          dispatch('change', null)
         }
         opened = false
       })
diff --git a/packages/presentation/src/components/UsersPopup.svelte b/packages/presentation/src/components/UsersPopup.svelte
index 9f5613e801..944ad28ae1 100644
--- a/packages/presentation/src/components/UsersPopup.svelte
+++ b/packages/presentation/src/components/UsersPopup.svelte
@@ -22,17 +22,23 @@
   import type { Ref, Class } from '@anticrm/core'
   import type { Person } from '@anticrm/contact'
   import { createQuery } from '../utils'
+  import { ActionIcon } from '@anticrm/ui'
+  import BlueCheck from './icons/BlueCheck.svelte'
 
   export let _class: Ref<Class<Person>>
   export let title: IntlString
   export let caption: IntlString
+  export let selected: Ref<Person> | undefined
+
+  export let allowDeselect: boolean = false
+  export let titleDeselect: IntlString | undefined = undefined
 
   let search: string = ''
   let objects: Person[] = []
 
   const dispatch = createEventDispatcher()
   const query = createQuery()
-  $: query.query(_class, { name: { $like: '%'+search+'%' } }, result => { objects = result })
+  $: query.query(_class, { name: { $like: '%' + search + '%' } }, result => { objects = result })
   afterUpdate(() => { dispatch('update', Date.now()) })
 </script>
 
@@ -46,7 +52,12 @@
     <div class="flex-col box">
       {#each objects as person}
         <button class="menu-item" on:click={() => { dispatch('close', person) }}>
-          <UserInfo size={'medium'} value={person} />
+          <div class='flex-grow'>
+            <UserInfo size={'medium'} value={person} />
+          </div>
+          {#if allowDeselect && person._id === selected}
+            <ActionIcon direction={'top'} label={titleDeselect ?? 'Deselect'} icon={BlueCheck} action={() => { dispatch('close', null) }} size={'small'}/>
+          {/if}
         </button>
       {/each}
     </div>
diff --git a/packages/presentation/src/components/icons/BlueCheck.svelte b/packages/presentation/src/components/icons/BlueCheck.svelte
new file mode 100644
index 0000000000..d6e27d4d9c
--- /dev/null
+++ b/packages/presentation/src/components/icons/BlueCheck.svelte
@@ -0,0 +1,22 @@
+<script lang="ts">
+  export let size: 'small' | 'medium' | 'large'
+  const fill: string = 'currentColor'
+</script>
+
+<svg class="svg-{size}" {fill} xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16">
+  <svg viewBox="0 0 24 24" {fill} xmlns="http://www.w3.org/2000/svg">
+    <g filter="url(#filter0_b_991_16450)">
+    <rect width="24" height="24" rx="12" fill="#4474F6"/>
+    </g>
+    <path d="M8.25 12L10.9989 15L15.75 9" stroke="white" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
+    <defs>
+    <filter id="filter0_b_991_16450" x="-100" y="-100" width="224" height="224" filterUnits="userSpaceOnUse" color-interpolation-filters="sRGB">
+    <feFlood flood-opacity="0" result="BackgroundImageFix"/>
+    <feGaussianBlur in="BackgroundImage" stdDeviation="50"/>
+    <feComposite in2="SourceAlpha" operator="in" result="effect1_backgroundBlur_991_16450"/>
+    <feBlend mode="normal" in="SourceGraphic" in2="effect1_backgroundBlur_991_16450" result="shape"/>
+    </filter>
+    </defs>
+    </svg>
+    
+</svg>
diff --git a/plugins/activity-resources/src/components/TxView.svelte b/plugins/activity-resources/src/components/TxView.svelte
index f2c82baa66..d036f1c544 100644
--- a/plugins/activity-resources/src/components/TxView.svelte
+++ b/plugins/activity-resources/src/components/TxView.svelte
@@ -129,8 +129,15 @@
     actions = result
   })
 
-  function getValue (utx: TxUpdateDoc<Doc>, key: string): any {
-    return (utx.operations as any)[key]
+  async function getValue (m: AttributeModel, utx: TxUpdateDoc<Doc>): Promise<any> {
+    const val = (utx.operations as any)[m.key]
+    console.log(m._class, m.key, val, typeof val)
+
+    if (client.getHierarchy().isDerived(m._class, core.class.Doc) && typeof val === 'string') {
+      // We have an reference, we need to find a real object to pass for presenter
+      return await client.findOne(m._class, { _id: val as Ref<Doc> })
+    }
+    return val
   }
   const showMenu = async (ev: MouseEvent): Promise<void> => {
     showPopup(
@@ -207,8 +214,14 @@
           {/if}
           {#if viewlet === undefined && model.length > 0 && tx.updateTx}
             {#each model as m}
-              <span>changed {m.label} to</span>
-              <div class="strong"><svelte:component this={m.presenter} value={getValue(tx.updateTx, m.key)} /></div>
+            {#await getValue(m, tx.updateTx) then value}
+                {#if value === null}
+                  <span>unset {m.label}</span>
+                {:else}
+                  <span>changed {m.label} to</span>                
+                  <div class="strong"><svelte:component this={m.presenter} {value} /></div>
+                {/if}
+              {/await}
             {/each}
           {:else if viewlet && viewlet.display === 'inline' && viewlet.component}
             <div>
diff --git a/plugins/recruit-resources/src/components/ApplicantHeader.svelte b/plugins/recruit-resources/src/components/ApplicantHeader.svelte
index 6f5380162a..f33979fe3f 100644
--- a/plugins/recruit-resources/src/components/ApplicantHeader.svelte
+++ b/plugins/recruit-resources/src/components/ApplicantHeader.svelte
@@ -13,28 +13,43 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 -->
-
 <script lang="ts">
+  import contact from '@anticrm/contact'
   import { AttributeBarEditor, getClient, UserBox } from '@anticrm/presentation'
   import { Applicant } from '@anticrm/recruit'
-  import contact from '@anticrm/contact'
 
   export let object: Applicant
   const client = getClient()
 
-  function change () {
-    client.updateDoc(object._class, object.space, object._id, { employee: object.employee })
+  function change() {
+    client.updateCollection(
+      object._class,
+      object.space,
+      object._id,
+      object.attachedTo,
+      object.attachedToClass,
+      object.collection,
+      { employee: object.employee }
+    )
   }
 </script>
 
 <div class="flex-between header">
-  <UserBox _class={contact.class.Employee} title='Assigned recruiter' caption='Recruiters' bind:value={object.employee} on:change={change} />
+  <UserBox
+    _class={contact.class.Employee}
+    title="Assigned recruiter"
+    caption="Recruiters"
+    bind:value={object.employee}
+    on:change={change}
+    allowDeselect
+    titleDeselect={'Unassign recruiter'}
+  />
   <AttributeBarEditor key={'state'} {object} showHeader={false} />
 </div>
 
 <style lang="scss">
   .header {
     width: 100%;
-    padding: 0 .5rem;
+    padding: 0 0.5rem;
   }
-</style>
\ No newline at end of file
+</style>
diff --git a/plugins/recruit-resources/src/components/CreateApplication.svelte b/plugins/recruit-resources/src/components/CreateApplication.svelte
index 4310cfda29..ed803c54a2 100644
--- a/plugins/recruit-resources/src/components/CreateApplication.svelte
+++ b/plugins/recruit-resources/src/components/CreateApplication.svelte
@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 -->
-
 <script lang="ts">
   import { createEventDispatcher } from 'svelte'
   import type { Ref, Space, SpaceWithStates } from '@anticrm/core'
@@ -33,7 +32,7 @@
 
   export let space: Ref<SpaceWithStates>
   export let candidate: Ref<Candidate> // | null = null
-  export let employee: Ref<Employee> // | null = null
+  export let employee: Ref<Employee> | null = null
 
   export let preserveCandidate = false
 
@@ -56,18 +55,31 @@
     if (sequence === undefined) {
       throw new Error('sequence object not found')
     }
-    const incResult = await client.updateDoc(view.class.Sequence, view.space.Sequence, sequence._id, {
-      $inc: { sequence: 1 }
-    }, true)
-    const id = await client.addCollection(recruit.class.Applicant, _space, candidate, recruit.class.Candidate, 'applications', {
-      state: state._id,
-      number: incResult.object.sequence,
-      employee: employee
-    })
+    const incResult = await client.updateDoc(
+      view.class.Sequence,
+      view.space.Sequence,
+      sequence._id,
+      {
+        $inc: { sequence: 1 }
+      },
+      true
+    )
+    const id = await client.addCollection(
+      recruit.class.Applicant,
+      _space,
+      candidate,
+      recruit.class.Candidate,
+      'applications',
+      {
+        state: state._id,
+        number: incResult.object.sequence,
+        employee: employee
+      }
+    )
   }
 
   async function validate (candidate: Ref<Candidate>, space: Ref<Space>) {
-    if (candidate === undefined) {
+    if (candidate == null) {
       status = new Status(Severity.INFO, recruit.status.CandidateRequired, {})
     } else {
       if (space === undefined) {
@@ -84,22 +96,32 @@
   }
 
   $: validate(candidate, _space)
-
 </script>
 
-<Card label={'Create Application'} 
-      okAction={createApplication}
-      canSave={status.severity === Severity.OK}
-      spaceClass={recruit.class.Vacancy}
-      spaceLabel={'Vacancy'}
-      spacePlaceholder={'Select vacancy'}
-      bind:space={_space}
-      on:close={() => { dispatch('close') }}>
+<Card
+  label={'Create Application'}
+  okAction={createApplication}
+  canSave={status.severity === Severity.OK}
+  spaceClass={recruit.class.Vacancy}
+  spaceLabel={'Vacancy'}
+  spacePlaceholder={'Select vacancy'}
+  bind:space={_space}
+  on:close={() => {
+    dispatch('close')
+  }}
+>
   <StatusControl slot="error" {status} />
   <Grid column={1} rowGap={1.75}>
     {#if !preserveCandidate}
-      <UserBox _class={recruit.class.Candidate} title='Candidate' caption='Candidates' bind:value={candidate} />
+      <UserBox _class={recruit.class.Candidate} title="Candidate" caption="Candidates" bind:value={candidate} />
     {/if}
-    <UserBox _class={contact.class.Employee} title='Assigned recruiter' caption='Recruiters' bind:value={employee} />
+    <UserBox
+      _class={contact.class.Employee}
+      title="Assigned recruiter"
+      caption="Recruiters"
+      bind:value={employee}
+      allowDeselect
+      titleDeselect={'Unassign recruiter'}
+    />
   </Grid>
 </Card>
diff --git a/plugins/recruit-resources/src/components/activity/TxApplicantUpdate.svelte b/plugins/recruit-resources/src/components/activity/TxApplicantUpdate.svelte
deleted file mode 100644
index 59b7c4fa75..0000000000
--- a/plugins/recruit-resources/src/components/activity/TxApplicantUpdate.svelte
+++ /dev/null
@@ -1,48 +0,0 @@
-<!--
-// Copyright © 2020, 2021 Anticrm Platform Contributors.
-// 
-// Licensed under the Eclipse Public License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License. You may
-// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
-// 
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// 
-// See the License for the specific language governing permissions and
-// limitations under the License.
--->
-
-<script lang="ts">
-  import type { Class, State, TxUpdateDoc } from '@anticrm/core'
-  import core from '@anticrm/core'
-  import { getClient } from '@anticrm/presentation'
-  import type { Applicant } from '@anticrm/recruit'
-  import { Component } from '@anticrm/ui'
-  import view from '@anticrm/view'
-
-  export let tx: TxUpdateDoc<Applicant>
-
-  const client = getClient()
-
-  const stateClass = client.getModel().getObject(core.class.State) as Class<State>
-  const statePresenter = client.getHierarchy().as(stateClass, view.mixin.AttributePresenter)
-
-</script>
-  
-{#if tx.operations.state}
-  <div class="flex-row-center update-container">
-    <span>updated State to</span>
-    {#if statePresenter?.presenter}
-      {#await client.findOne(core.class.State, { _id: tx.operations.state }) then st}
-        {#if st}
-          <Component is={statePresenter.presenter} props={{ value: st }}/>
-        {/if}
-      {/await}
-    {/if}
-  </div>
-{/if}
-
-<style lang="scss">
-  .update-container span { margin-right: .5rem; }
-</style>
diff --git a/plugins/recruit-resources/src/index.ts b/plugins/recruit-resources/src/index.ts
index b8007d81a0..253a48abab 100644
--- a/plugins/recruit-resources/src/index.ts
+++ b/plugins/recruit-resources/src/index.ts
@@ -25,7 +25,6 @@ import KanbanCard from './components/KanbanCard.svelte'
 import EditVacancy from './components/EditVacancy.svelte'
 import ApplicationPresenter from './components/ApplicationPresenter.svelte'
 import ApplicationsPresenter from './components/ApplicationsPresenter.svelte'
-import TxApplicantUpdate from './components/activity/TxApplicantUpdate.svelte'
 
 import { showPopup } from '@anticrm/ui'
 import { Resources } from '@anticrm/platform'
@@ -49,8 +48,5 @@ export default async (): Promise<Resources> => ({
     ApplicationPresenter,
     ApplicationsPresenter,
     EditVacancy
-  },
-  activity: {
-    TxApplicantUpdate
   }
 })
diff --git a/plugins/recruit/src/index.ts b/plugins/recruit/src/index.ts
index 71097c5bb7..7b85fc8d5e 100644
--- a/plugins/recruit/src/index.ts
+++ b/plugins/recruit/src/index.ts
@@ -53,7 +53,7 @@ export interface Candidate extends Person {
 export interface Applicant extends DocWithState, AttachedDoc {
   attachments?: number
   comments?: number
-  employee: Ref<Employee>
+  employee: Ref<Employee> | null
 }
 
 /**
diff --git a/plugins/task-assets/lang/en.json b/plugins/task-assets/lang/en.json
index ae5098566e..46c91c2a36 100644
--- a/plugins/task-assets/lang/en.json
+++ b/plugins/task-assets/lang/en.json
@@ -16,6 +16,7 @@
     "UploadDropFilesHere": "Upload or drop files here",
     "NoAttachmentsForTask": "There are no attachments for this task.",
     "AssigneeRequired": "Assignee is required",
-    "More": "Options"
+    "More": "Options",
+    "TaskUnAssign": "Unassign"
   }
 }
\ No newline at end of file
diff --git a/plugins/task-resources/src/components/CreateTask.svelte b/plugins/task-resources/src/components/CreateTask.svelte
index 9cddc13f25..cc04edda63 100644
--- a/plugins/task-resources/src/components/CreateTask.svelte
+++ b/plugins/task-resources/src/components/CreateTask.svelte
@@ -13,7 +13,7 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import contact, { Employee, EmployeeAccount } from '@anticrm/contact'
+  import contact, { Employee } from '@anticrm/contact'
   import type { Data, Ref, Space } from '@anticrm/core'
   import { generateId } from '@anticrm/core'
   import { OK, Status } from '@anticrm/platform'
@@ -29,12 +29,12 @@
   let _space = space
   const status: Status = OK
 
-  let assignee: Ref<EmployeeAccount> // | null = null
+  let assignee: Ref<Employee> | null = null
 
   const object: Data<Task> = {
     name: '',
     description: '',
-    assignee: undefined as unknown as Ref<Employee>,
+    assignee: null,
     number: 0
   }
 
@@ -79,7 +79,7 @@
 <Card
   label={task.string.CreateTask}
   okAction={createTask}
-  canSave={object.name.length > 0 && assignee !== undefined}
+  canSave={object.name.length > 0}
   spaceClass={task.class.Project}
   spaceLabel={task.string.ProjectName}
   spacePlaceholder={task.string.SelectProject}
@@ -99,10 +99,12 @@
       focus
     />
     <UserBox
-      _class={contact.class.EmployeeAccount}
+      _class={contact.class.Employee}
       title="Assignee *"
       caption="Assign this task"
       bind:value={assignee}
+      allowDeselect
+      titleDeselect={task.string.TaskUnAssign}
     />
   </Grid>
 </Card>
diff --git a/plugins/task-resources/src/components/TaskHeader.svelte b/plugins/task-resources/src/components/TaskHeader.svelte
index a8fa60b8a5..0ce4430b22 100644
--- a/plugins/task-resources/src/components/TaskHeader.svelte
+++ b/plugins/task-resources/src/components/TaskHeader.svelte
@@ -34,6 +34,8 @@
     caption="Assignee"
     bind:value={object.assignee}
     on:change={change}
+    allowDeselect
+    titleDeselect={task.string.TaskUnAssign}
   />
   <AttributeBarEditor key={'state'} {object} showHeader={false} />
 </div>
diff --git a/plugins/task-resources/src/plugin.ts b/plugins/task-resources/src/plugin.ts
index c65fe72254..63062d6359 100644
--- a/plugins/task-resources/src/plugin.ts
+++ b/plugins/task-resources/src/plugin.ts
@@ -30,6 +30,7 @@ export default mergeIds(taskId, task, {
     SelectProject: '' as IntlString,
     TaskName: '' as IntlString,
     TaskAssignee: '' as IntlString,
+    TaskUnAssign: '' as IntlString,
     TaskDescription: '' as IntlString,
     NoAttachmentsForTask: '' as IntlString,
     UploadDropFilesHere: '' as IntlString,
diff --git a/plugins/task/src/index.ts b/plugins/task/src/index.ts
index 55eaac94d2..d95957ae34 100644
--- a/plugins/task/src/index.ts
+++ b/plugins/task/src/index.ts
@@ -33,7 +33,7 @@ export interface Task extends Doc {
 
   name: string
   description: string
-  assignee: Ref<Employee>
+  assignee: Ref<Employee> | null
 
   comments?: number
   attachments?: number
diff --git a/plugins/view-resources/src/utils.ts b/plugins/view-resources/src/utils.ts
index 867131f4c2..301526da29 100644
--- a/plugins/view-resources/src/utils.ts
+++ b/plugins/view-resources/src/utils.ts
@@ -1,36 +1,35 @@
 //
 // Copyright © 2020, 2021 Anticrm Platform Contributors.
 // Copyright © 2021 Hardcore Engineering Inc.
-// 
+//
 // Licensed under the Eclipse Public License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License. You may
 // obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
-// 
+//
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// 
+//
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
 
+import type { Class, Client, Doc, FindOptions, FindResult, Obj, Ref } from '@anticrm/core'
 import type { IntlString } from '@anticrm/platform'
 import { getResource } from '@anticrm/platform'
-import type { Ref, Class, Obj, FindOptions, Doc, Client, FindResult } from '@anticrm/core'
-import type { AnyComponent, AnySvelteComponent } from '@anticrm/ui'
+import type { AnyComponent } from '@anticrm/ui'
 import type { Action, ActionTarget, BuildModelOptions } from '@anticrm/view'
-
 import view, { AttributeModel } from '@anticrm/view'
 
 /**
  * @public
  */
-export async function getObjectPresenter(client: Client, _class: Ref<Class<Obj>>, preserveKey: string): Promise<AttributeModel> { 
-  const clazz = client.getHierarchy().getClass(_class) 
+export async function getObjectPresenter (client: Client, _class: Ref<Class<Obj>>, preserveKey: string): Promise<AttributeModel> {
+  const clazz = client.getHierarchy().getClass(_class)
   const presenterMixin = client.getHierarchy().as(clazz, view.mixin.AttributePresenter)
   if (presenterMixin.presenter === undefined) {
     if (clazz.extends !== undefined) {
-      return getObjectPresenter(client, clazz.extends, preserveKey)
+      return await getObjectPresenter(client, clazz.extends, preserveKey)
     } else {
       throw new Error('object presenter not found for ' + preserveKey)
     }
@@ -38,37 +37,48 @@ export async function getObjectPresenter(client: Client, _class: Ref<Class<Obj>>
   const presenter = await getResource(presenterMixin.presenter)
   return {
     key: preserveKey,
+    _class,
     label: clazz.label,
     presenter
-  } as AttributeModel
+  }
 }
 
-async function getAttributePresenter(client: Client, _class: Ref<Class<Obj>>, key: string, preserveKey: string) {
+async function getAttributePresenter (client: Client, _class: Ref<Class<Obj>>, key: string, preserveKey: string): Promise<AttributeModel> {
   const attribute = client.getHierarchy().getAttribute(_class, key)
-  const clazz = client.getHierarchy().getClass(attribute.type._class) 
-  const presenterMixin = client.getHierarchy().as(clazz, view.mixin.AttributePresenter)
+  let attrClass = attribute.type._class
+  const clazz = client.getHierarchy().getClass(attrClass)
+  let presenterMixin = client.getHierarchy().as(clazz, view.mixin.AttributePresenter)
+  let parent = clazz.extends
+  while (presenterMixin.presenter === undefined && parent !== undefined) {
+    const pclazz = client.getHierarchy().getClass(parent)
+    attrClass = parent
+    presenterMixin = client.getHierarchy().as(pclazz, view.mixin.AttributePresenter)
+    parent = pclazz.extends
+  }
   if (presenterMixin.presenter === undefined) {
     throw new Error('attribute presenter not found for ' + preserveKey)
   }
   const presenter = await getResource(presenterMixin.presenter)
   return {
     key: preserveKey,
+    _class: attrClass,
     label: attribute.label,
     presenter
-  } as AttributeModel
+  }
 }
 
-async function getPresenter(client: Client, _class: Ref<Class<Obj>>, key: string, preserveKey: string, options?: FindOptions<Doc>): Promise<AttributeModel> {
+async function getPresenter (client: Client, _class: Ref<Class<Obj>>, key: string, preserveKey: string, options?: FindOptions<Doc>): Promise<AttributeModel> {
   if (typeof key === 'object') {
-    const {presenter, label} = key
+    const { presenter, label } = key
     return {
       key: '',
+      _class,
       label: label as IntlString,
       presenter: await getResource(presenter as AnyComponent)
     }
   }
   if (key.length === 0) {
-    return getObjectPresenter(client, _class, preserveKey)
+    return await getObjectPresenter(client, _class, preserveKey)
   } else {
     const split = key.split('.')
     if (split[0] === '$lookup') {
@@ -80,36 +90,37 @@ async function getPresenter(client: Client, _class: Ref<Class<Obj>>, key: string
       const model = await getPresenter(client, lookupClass, lookupKey, preserveKey)
       if (lookupKey === '') {
         const attribute = client.getHierarchy().getAttribute(_class, split[1])
-        model.label = attribute.label as IntlString
+        model.label = attribute.label
       } else {
         const attribute = client.getHierarchy().getAttribute(lookupClass, lookupKey)
-        model.label = attribute.label as IntlString
+        model.label = attribute.label
       }
       return model
     }
-    return getAttributePresenter(client, _class, key, preserveKey)
+    return await getAttributePresenter(client, _class, key, preserveKey)
   }
 }
 
-export async function buildModel(options: BuildModelOptions): Promise<AttributeModel[]> {
+export async function buildModel (options: BuildModelOptions): Promise<AttributeModel[]> {
   console.log('building table model for', options._class)
+  // eslint-disable-next-line array-callback-return
   const model = options.keys.map(key => {
     try {
       const result = getPresenter(options.client, options._class, key, key, options.options)
       return result
-    } catch(err: any) {
+    } catch (err: any) {
       if (!(options.ignoreMissing ?? false)) {
         throw err
       }
     }
   })
   console.log(model)
-  return (await Promise.all(model)).filter(a => a !== undefined) as AttributeModel[]  
+  return (await Promise.all(model)).filter(a => a !== undefined) as AttributeModel[]
 }
 
-function filterActions(client: Client, _class: Ref<Class<Obj>>, targets: ActionTarget[]): Ref<Action>[] {
-  const result: Ref<Action>[] = []
-  for (const target of targets) { 
+function filterActions (client: Client, _class: Ref<Class<Obj>>, targets: ActionTarget[]): Array<Ref<Action>> {
+  const result: Array<Ref<Action>> = []
+  for (const target of targets) {
     if (client.getHierarchy().isDerived(_class, target.target)) {
       result.push(target.action)
     }
@@ -117,7 +128,7 @@ function filterActions(client: Client, _class: Ref<Class<Obj>>, targets: ActionT
   return result
 }
 
-export async function getActions(client: Client, _class: Ref<Class<Obj>>): Promise<FindResult<Action>> {
+export async function getActions (client: Client, _class: Ref<Class<Obj>>): Promise<FindResult<Action>> {
   const targets = await client.findAll(view.class.ActionTarget, {})
-  return await client.findAll(view.class.Action, { _id: { $in: filterActions(client, _class, targets) }})
+  return await client.findAll(view.class.Action, { _id: { $in: filterActions(client, _class, targets) } })
 }
diff --git a/plugins/view/src/index.ts b/plugins/view/src/index.ts
index 5f91844d17..82c7b6f677 100644
--- a/plugins/view/src/index.ts
+++ b/plugins/view/src/index.ts
@@ -109,6 +109,7 @@ export const viewId = 'view' as Plugin
 export interface AttributeModel {
   key: string
   label: IntlString
+  _class: Ref<Class<Doc>>
   presenter: AnySvelteComponent
 }