diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
index e5b488f..9ac18de 100644
--- a/.idea/codeStyles/Project.xml
+++ b/.idea/codeStyles/Project.xml
@@ -15,7 +15,6 @@
       <option name="NAME_COUNT_TO_USE_STAR_IMPORT" value="2147483647" />
       <option name="NAME_COUNT_TO_USE_STAR_IMPORT_FOR_MEMBERS" value="2147483647" />
       <option name="IMPORT_NESTED_CLASSES" value="true" />
-      <option name="ALLOW_TRAILING_COMMA" value="true" />
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
     <PostgresCodeStyleSettings version="5">
diff --git a/.idea/runConfigurations/Lint_Test_Sonar___Run.xml b/.idea/runConfigurations/Lint_Test_Sonar___Run.xml
deleted file mode 100644
index ad6b930..0000000
--- a/.idea/runConfigurations/Lint_Test_Sonar___Run.xml
+++ /dev/null
@@ -1,42 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Lint+Test+Sonar &amp; Run" type="GradleRunConfiguration" factoryName="Gradle">
-    <ExternalSystemSettings>
-      <option name="env">
-        <map>
-          <entry key="SEND_GRID_KEY" value="$SEND_GRID_KEY$" />
-        </map>
-      </option>
-      <option name="executionName" />
-      <option name="externalProjectPath" value="$PROJECT_DIR$" />
-      <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
-      <option name="taskDescriptions">
-        <list />
-      </option>
-      <option name="taskNames">
-        <list>
-          <option value="run" />
-        </list>
-      </option>
-      <option name="vmOptions" value="" />
-    </ExternalSystemSettings>
-    <ExternalSystemDebugServerProcess>true</ExternalSystemDebugServerProcess>
-    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
-    <extension name="net.ashald.envfile">
-      <option name="IS_ENABLED" value="false" />
-      <option name="IS_SUBST" value="false" />
-      <option name="IS_PATH_MACRO_SUPPORTED" value="false" />
-      <option name="IS_IGNORE_MISSING_FILES" value="false" />
-      <option name="IS_ENABLE_EXPERIMENTAL_INTEGRATIONS" value="false" />
-      <ENTRIES>
-        <ENTRY IS_ENABLED="true" PARSER="runconfig" />
-      </ENTRIES>
-    </extension>
-    <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2">
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="Lint Format" run_configuration_type="GradleRunConfiguration" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="All Tests" run_configuration_type="JUnit" />
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="Sonarqube" run_configuration_type="GradleRunConfiguration" />
-    </method>
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/Sonarqube.xml b/.idea/runConfigurations/Sonarqube.xml
index fbb2ed1..af093fa 100644
--- a/.idea/runConfigurations/Sonarqube.xml
+++ b/.idea/runConfigurations/Sonarqube.xml
@@ -18,8 +18,6 @@
     <ExternalSystemDebugServerProcess>true</ExternalSystemDebugServerProcess>
     <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
     <DebugAllEnabled>false</DebugAllEnabled>
-    <method v="2">
-      <option name="RunConfigurationTask" enabled="true" run_configuration_name="Test" run_configuration_type="GradleRunConfiguration" />
-    </method>
+    <method v="2" />
   </configuration>
 </component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/Sonarqube_without_test.xml b/.idea/runConfigurations/Sonarqube_without_test.xml
index 4825a68..1774008 100644
--- a/.idea/runConfigurations/Sonarqube_without_test.xml
+++ b/.idea/runConfigurations/Sonarqube_without_test.xml
@@ -4,7 +4,7 @@
       <option name="executionName" />
       <option name="externalProjectPath" value="$PROJECT_DIR$" />
       <option name="externalSystemIdString" value="GRADLE" />
-      <option name="scriptParameters" value="" />
+      <option name="scriptParameters" value="-x test -x ktlintKotlinScriptCheck -x ktlintTestSourceSetCheck -x ktlintMainSourceSetCheck" />
       <option name="taskDescriptions">
         <list />
       </option>
diff --git a/src/main/kotlin/fr/dcproject/common/dto/CreatedAt.kt b/src/main/kotlin/fr/dcproject/common/dto/CreatedAt.kt
index a48589d..e50653c 100644
--- a/src/main/kotlin/fr/dcproject/common/dto/CreatedAt.kt
+++ b/src/main/kotlin/fr/dcproject/common/dto/CreatedAt.kt
@@ -1,7 +1,7 @@
 package fr.dcproject.common.dto
 
-import fr.postgresjson.entity.EntityCreatedAt
 import org.joda.time.DateTime
+import fr.dcproject.common.entity.CreatedAt as EntityCreatedAt
 
 interface CreatedAt {
     val createdAt: DateTime
diff --git a/src/main/kotlin/fr/dcproject/common/dto/Versionable.kt b/src/main/kotlin/fr/dcproject/common/dto/Versionable.kt
index 9dd777b..a4fd505 100644
--- a/src/main/kotlin/fr/dcproject/common/dto/Versionable.kt
+++ b/src/main/kotlin/fr/dcproject/common/dto/Versionable.kt
@@ -1,13 +1,13 @@
 package fr.dcproject.common.dto
 
-import fr.postgresjson.entity.EntityVersioning
+import fr.dcproject.common.entity.Versionable as VersionableEntity
 import java.util.UUID
 
 interface Versionable {
     val versionId: UUID
     val versionNumber: Int
 
-    class Imp(parent: EntityVersioning<UUID, Int>) : Versionable {
+    class Imp(parent: VersionableEntity) : Versionable {
         override val versionNumber: Int = parent.versionNumber
         override val versionId: UUID = parent.versionId
     }
diff --git a/src/main/kotlin/fr/dcproject/common/entity/Action.kt b/src/main/kotlin/fr/dcproject/common/entity/Action.kt
new file mode 100644
index 0000000..cb78e2e
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/common/entity/Action.kt
@@ -0,0 +1,28 @@
+package fr.dcproject.common.entity
+
+import fr.dcproject.component.citizen.CitizenI
+
+interface Created<C : CitizenI> : CreatedAt, CreatedBy<C> {
+    class Imp<C : CitizenI>(createdBy: C) :
+        Created<C>,
+        CreatedBy<C> by CreatedBy.Imp(createdBy),
+        CreatedAt by CreatedAt.Imp()
+}
+
+interface Updated<C : CitizenI> : UpdatedAt, UpdatedBy<C> {
+    class Imp<C : CitizenI>(updatedAt: C) :
+        Updated<C>,
+        UpdatedBy<C> by UpdatedBy.Imp(updatedAt),
+        UpdatedAt by UpdatedAt.Imp()
+}
+
+interface Deleted<C : CitizenI> : DeletedAt, DeletedBy<C> {
+    override fun isDeleted(): Boolean = (this as DeletedAt).isDeleted()
+
+    class Imp<C : CitizenI>(deletedAt: C) :
+        Deleted<C>,
+        DeletedBy<C> by DeletedBy.Imp(deletedAt),
+        DeletedAt by DeletedAt.Imp() {
+        override fun isDeleted(): Boolean = (this as Deleted<C>).isDeleted()
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/fr/dcproject/common/entity/ActionBy.kt b/src/main/kotlin/fr/dcproject/common/entity/ActionBy.kt
new file mode 100644
index 0000000..521cca3
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/common/entity/ActionBy.kt
@@ -0,0 +1,25 @@
+package fr.dcproject.common.entity
+
+import fr.dcproject.component.citizen.CitizenI
+
+interface CreatedBy<T : CitizenI> {
+    val createdBy: T
+
+    class Imp<T : CitizenI>(override val createdBy: T) : CreatedBy<T>
+}
+
+interface UpdatedBy<T : CitizenI> {
+    val updatedBy: T
+
+    class Imp<T : CitizenI>(override val updatedBy: T) : UpdatedBy<T>
+}
+
+interface DeletedBy<T : CitizenI> {
+    val deletedBy: T?
+
+    fun isDeleted(): Boolean {
+        return deletedBy?.let { true } ?: false
+    }
+
+    class Imp<T : CitizenI>(override val deletedBy: T?) : DeletedBy<T>
+}
diff --git a/src/main/kotlin/fr/dcproject/common/entity/CreatedBy.kt b/src/main/kotlin/fr/dcproject/common/entity/CreatedBy.kt
deleted file mode 100644
index 5d464d7..0000000
--- a/src/main/kotlin/fr/dcproject/common/entity/CreatedBy.kt
+++ /dev/null
@@ -1,14 +0,0 @@
-package fr.dcproject.common.entity
-
-import fr.dcproject.component.citizen.CitizenI
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityI
-
-/**
- * TODO remove EntityCreatedBy<EntityI>
- */
-interface CreatedBy<T : CitizenI> : EntityCreatedBy<EntityI> {
-    override val createdBy: T
-}
-
-class CreatedByImp<T : CitizenI>(override val createdBy: T) : CreatedBy<T>
diff --git a/src/main/kotlin/fr/dcproject/common/entity/Date.kt b/src/main/kotlin/fr/dcproject/common/entity/Date.kt
new file mode 100644
index 0000000..12fd3ac
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/common/entity/Date.kt
@@ -0,0 +1,30 @@
+package fr.dcproject.common.entity
+
+import org.joda.time.DateTime
+
+/* Interface */
+interface CreatedAt {
+    val createdAt: DateTime
+    class Imp(
+        override val createdAt: DateTime = DateTime.now()
+    ) : CreatedAt
+}
+interface UpdatedAt {
+    val updatedAt: DateTime
+    class Imp(
+        override val updatedAt: DateTime = DateTime.now()
+    ) : UpdatedAt
+}
+
+interface DeletedAt {
+    val deletedAt: DateTime?
+    fun isDeleted(): Boolean {
+        return deletedAt?.let {
+            it < DateTime.now()
+        } ?: false
+    }
+
+    class Imp(
+        override val deletedAt: DateTime? = null
+    ) : DeletedAt
+}
diff --git a/src/main/kotlin/fr/dcproject/common/entity/EntityI.kt b/src/main/kotlin/fr/dcproject/common/entity/EntityI.kt
index 8d36019..fa87a5f 100644
--- a/src/main/kotlin/fr/dcproject/common/entity/EntityI.kt
+++ b/src/main/kotlin/fr/dcproject/common/entity/EntityI.kt
@@ -1,8 +1,12 @@
 package fr.dcproject.common.entity
 
-import fr.postgresjson.entity.EntityI
+import fr.postgresjson.entity.UuidEntityI
 import java.util.UUID
 
-interface EntityI : EntityI {
-    val id: UUID
+interface EntityI : UuidEntityI {
+    override val id: UUID
+}
+
+open class Entity(id: UUID? = null) : EntityI {
+    override val id: UUID = id ?: UUID.randomUUID()
 }
diff --git a/src/main/kotlin/fr/dcproject/common/entity/Extra.kt b/src/main/kotlin/fr/dcproject/common/entity/Extra.kt
index 743f898..28796dd 100644
--- a/src/main/kotlin/fr/dcproject/common/entity/Extra.kt
+++ b/src/main/kotlin/fr/dcproject/common/entity/Extra.kt
@@ -5,25 +5,21 @@ import fr.dcproject.component.citizen.CitizenI
 import fr.dcproject.component.comment.generic.CommentRef
 import fr.dcproject.component.constitution.ConstitutionRef
 import fr.dcproject.component.opinion.entity.OpinionRef
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.UuidEntity
-import fr.postgresjson.entity.UuidEntityI
 import java.util.UUID
 import kotlin.reflect.KClass
 import kotlin.reflect.full.isSubclassOf
 
 interface ExtraI<T : TargetI, C : CitizenI> :
-    UuidEntityI,
+    EntityI,
     HasTarget<T>,
-    EntityCreatedAt,
-    EntityCreatedBy<C>
+    CreatedAt,
+    CreatedBy<C>
 
 interface HasTarget<T : TargetI> {
     val target: T
 }
 
-open class TargetRef(id: UUID? = null, reference: String = "") : TargetI, UuidEntity(id) {
+open class TargetRef(id: UUID? = null, reference: String = "") : TargetI, Entity(id) {
 
     final override val reference: String
         get() = if (field != "") field else TargetI.getReference(this)
@@ -33,7 +29,7 @@ open class TargetRef(id: UUID? = null, reference: String = "") : TargetI, UuidEn
     }
 }
 
-interface TargetI : UuidEntityI {
+interface TargetI : EntityI {
     enum class TargetName(val targetReference: String) {
         Article("article"),
         Constitution("constitution"),
diff --git a/src/main/kotlin/fr/dcproject/common/entity/Versionable.kt b/src/main/kotlin/fr/dcproject/common/entity/Versionable.kt
index 8a04389..33c493e 100644
--- a/src/main/kotlin/fr/dcproject/common/entity/Versionable.kt
+++ b/src/main/kotlin/fr/dcproject/common/entity/Versionable.kt
@@ -1,17 +1,25 @@
 package fr.dcproject.common.entity
 
-import fr.postgresjson.entity.EntityVersioning
 import java.util.UUID
 
-interface VersionableRef {
+interface VersionableId {
     val versionId: UUID
+
+    class Imp(
+        versionId: UUID? = null,
+    ) : VersionableId {
+        override val versionId: UUID = versionId ?: UUID.randomUUID()
+    }
 }
 
-class VersionableRefImp(
+interface Versionable : VersionableId {
     override val versionId: UUID
-) : VersionableRef
+    val versionNumber: Int
 
-interface Versionable : VersionableRef, EntityVersioning<UUID, Int> {
-    override val versionId: UUID
-    override val versionNumber: Int
+    class Imp(
+        override val versionNumber: Int,
+        versionId: UUID? = null,
+    ) : Versionable {
+        override val versionId: UUID = versionId ?: UUID.randomUUID()
+    }
 }
diff --git a/src/main/kotlin/fr/dcproject/component/article/Article.kt b/src/main/kotlin/fr/dcproject/component/article/Article.kt
index bc77fe3..a041078 100644
--- a/src/main/kotlin/fr/dcproject/component/article/Article.kt
+++ b/src/main/kotlin/fr/dcproject/component/article/Article.kt
@@ -1,9 +1,13 @@
 package fr.dcproject.component.article
 
+import fr.dcproject.common.entity.CreatedAt
 import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.DeletedAt
+import fr.dcproject.common.entity.EntityI
 import fr.dcproject.common.entity.TargetI
 import fr.dcproject.common.entity.TargetRef
-import fr.dcproject.common.entity.VersionableRef
+import fr.dcproject.common.entity.Versionable
+import fr.dcproject.common.entity.VersionableId
 import fr.dcproject.component.citizen.CitizenCart
 import fr.dcproject.component.citizen.CitizenCartI
 import fr.dcproject.component.citizen.CitizenI
@@ -16,12 +20,6 @@ import fr.dcproject.component.workgroup.WorkgroupCart
 import fr.dcproject.component.workgroup.WorkgroupCartI
 import fr.dcproject.component.workgroup.WorkgroupRef
 import fr.dcproject.component.workgroup.WorkgroupSimple
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityDeletedAt
-import fr.postgresjson.entity.EntityDeletedAtImp
-import fr.postgresjson.entity.EntityVersioning
-import fr.postgresjson.entity.UuidEntityI
 import org.joda.time.DateTime
 import java.util.UUID
 
@@ -42,16 +40,16 @@ data class ArticleForView(
 ) : ArticleRef(id),
     ArticleAuthI<CitizenRef>,
     ArticleWithTitleI,
-    EntityVersioning<UUID, Int>,
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityDeletedAt by EntityDeletedAtImp(deletedAt),
-    VersionableRef,
+    Versionable,
+    CreatedAt by CreatedAt.Imp(),
+    DeletedAt by DeletedAt.Imp(deletedAt),
+    VersionableId,
     Opinionable,
     Votable by VotableImp() {
     val lastVersion: Boolean = false
 }
 
-interface ArticleForUpdateI<C : CitizenRef> : ArticleI, ArticleWithTitleI, VersionableRef, TargetI, CreatedBy<C> {
+interface ArticleForUpdateI<C : CitizenRef> : ArticleI, ArticleWithTitleI, VersionableId, TargetI, CreatedBy<C> {
     val anonymous: Boolean
     val content: String
     val description: String
@@ -74,7 +72,7 @@ class ArticleForUpdate(
 ) : ArticleRef(id),
     ArticleForUpdateI<CitizenRef>,
     ArticleAuthI<CitizenRef>,
-    VersionableRef {
+    VersionableId {
     val tags: List<String> = tags.distinct()
 }
 
@@ -99,7 +97,7 @@ open class ArticleRef(
     id: UUID? = null
 ) : ArticleI, TargetRef(id)
 
-interface ArticleI : UuidEntityI, TargetI
+interface ArticleI : EntityI, TargetI
 
 interface ArticleWithTitleI : ArticleI {
     val title: String
@@ -108,6 +106,6 @@ interface ArticleWithTitleI : ArticleI {
 interface ArticleAuthI<U : CitizenI> :
     ArticleI,
     CreatedBy<U>,
-    EntityDeletedAt {
+    DeletedAt {
     val draft: Boolean
 }
diff --git a/src/main/kotlin/fr/dcproject/component/article/ArticleAccessControl.kt b/src/main/kotlin/fr/dcproject/component/article/ArticleAccessControl.kt
index 82e4fae..d29b922 100644
--- a/src/main/kotlin/fr/dcproject/component/article/ArticleAccessControl.kt
+++ b/src/main/kotlin/fr/dcproject/component/article/ArticleAccessControl.kt
@@ -1,7 +1,7 @@
 package fr.dcproject.component.article
 
 import fr.dcproject.common.entity.CreatedBy
-import fr.dcproject.common.entity.VersionableRef
+import fr.dcproject.common.entity.VersionableId
 import fr.dcproject.common.security.AccessControl
 import fr.dcproject.common.security.AccessResponse
 import fr.dcproject.component.citizen.CitizenI
@@ -28,7 +28,7 @@ class ArticleAccessControl(private val articleRepo: ArticleRepository) : AccessC
     fun <S> canUpsert(subject: S, citizen: CitizenI?): AccessResponse
         where S : ArticleI,
               S : CreatedBy<*>,
-              S : VersionableRef {
+              S : VersionableId {
         if (citizen == null) return denied("You must be connected to create article", "article.create.notConnected")
         /* The new Article must by created by the same citizen of the connected citizen */
         if (subject.createdBy.id == citizen.id) {
diff --git a/src/main/kotlin/fr/dcproject/component/article/ArticleViewManager.kt b/src/main/kotlin/fr/dcproject/component/article/ArticleViewManager.kt
index 50e429f..9b1bda0 100644
--- a/src/main/kotlin/fr/dcproject/component/article/ArticleViewManager.kt
+++ b/src/main/kotlin/fr/dcproject/component/article/ArticleViewManager.kt
@@ -1,6 +1,6 @@
 package fr.dcproject.component.article
 
-import fr.dcproject.common.entity.VersionableRef
+import fr.dcproject.common.entity.VersionableId
 import fr.dcproject.common.utils.contentToString
 import fr.dcproject.common.utils.getJsonField
 import fr.dcproject.common.utils.toIso
@@ -16,7 +16,7 @@ import java.util.UUID
 /**
  * Wrapper for manage views with elasticsearch
  */
-class ArticleViewManager <A> (private val restClient: RestClient) : ViewManager<A> where A : VersionableRef, A : ArticleI {
+class ArticleViewManager <A> (private val restClient: RestClient) : ViewManager<A> where A : VersionableId, A : ArticleI {
     /**
      * Add view on article to elasticsearch
      */
diff --git a/src/main/kotlin/fr/dcproject/component/auth/User.kt b/src/main/kotlin/fr/dcproject/component/auth/User.kt
index 0fdf6f6..f2db49f 100644
--- a/src/main/kotlin/fr/dcproject/component/auth/User.kt
+++ b/src/main/kotlin/fr/dcproject/component/auth/User.kt
@@ -1,12 +1,10 @@
 package fr.dcproject.component.auth
 
+import fr.dcproject.common.entity.CreatedAt
+import fr.dcproject.common.entity.Entity
+import fr.dcproject.common.entity.EntityI
+import fr.dcproject.common.entity.UpdatedAt
 import fr.dcproject.component.auth.UserI.Roles
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityUpdatedAt
-import fr.postgresjson.entity.EntityUpdatedAtImp
-import fr.postgresjson.entity.UuidEntity
-import fr.postgresjson.entity.UuidEntityI
 import io.ktor.auth.Principal
 import org.joda.time.DateTime
 import java.util.UUID
@@ -26,8 +24,8 @@ open class User(
     var blockedAt: DateTime? = null,
     var roles: List<Roles> = emptyList()
 ) : UserRef(id),
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityUpdatedAt by EntityUpdatedAtImp()
+    CreatedAt by CreatedAt.Imp(),
+    UpdatedAt by UpdatedAt.Imp()
 
 interface UserWithPasswordI {
     val id: UUID
@@ -42,9 +40,9 @@ class UserWithPassword(
 
 open class UserRef(
     id: UUID = UUID.randomUUID()
-) : UserI, UuidEntity(id)
+) : UserI, Entity(id)
 
-interface UserI : UuidEntityI, Principal {
+interface UserI : EntityI, Principal {
     enum class Roles { ROLE_USER, ROLE_ADMIN }
 }
 
diff --git a/src/main/kotlin/fr/dcproject/component/citizen/Citizen.kt b/src/main/kotlin/fr/dcproject/component/citizen/Citizen.kt
index c407922..254690c 100644
--- a/src/main/kotlin/fr/dcproject/component/citizen/Citizen.kt
+++ b/src/main/kotlin/fr/dcproject/component/citizen/Citizen.kt
@@ -1,18 +1,16 @@
 package fr.dcproject.component.citizen
 
+import fr.dcproject.common.entity.CreatedAt
+import fr.dcproject.common.entity.DeletedAt
+import fr.dcproject.common.entity.Entity
+import fr.dcproject.common.entity.EntityI
 import fr.dcproject.component.auth.User
 import fr.dcproject.component.auth.UserForCreate
 import fr.dcproject.component.auth.UserI
 import fr.dcproject.component.auth.UserRef
 import fr.dcproject.component.citizen.CitizenI.Name
 import fr.dcproject.component.workgroup.WorkgroupSimple
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityDeletedAt
-import fr.postgresjson.entity.EntityDeletedAtImp
 import fr.postgresjson.entity.Serializable
-import fr.postgresjson.entity.UuidEntity
-import fr.postgresjson.entity.UuidEntityI
 import org.joda.time.DateTime
 import java.util.UUID
 
@@ -26,7 +24,7 @@ class CitizenForCreate(
     id: UUID = UUID.randomUUID(),
 ) : CitizenI,
     CitizenRefWithUser(id, user),
-    EntityCreatedAt by EntityCreatedAtImp()
+    CreatedAt by CreatedAt.Imp()
 
 class Citizen(
     override val id: UUID = UUID.randomUUID(),
@@ -42,8 +40,8 @@ class Citizen(
     CitizenWithUserI,
     CitizenRef(id),
     CitizenCartI,
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityDeletedAt by EntityDeletedAtImp(deletedAt) {
+    CreatedAt by CreatedAt.Imp(),
+    DeletedAt by DeletedAt.Imp(deletedAt) {
     var workgroups: List<WorkgroupAndRoles> = emptyList()
 
     class WorkgroupAndRoles(
@@ -64,7 +62,7 @@ data class CitizenBasic(
     override val deletedAt: DateTime? = null
 ) : CitizenBasicI,
     CitizenRefWithUser(id, user),
-    EntityDeletedAt by EntityDeletedAtImp(deletedAt)
+    DeletedAt by DeletedAt.Imp(deletedAt)
 
 @Deprecated("")
 open class CitizenSimple(
@@ -92,10 +90,10 @@ open class CitizenRefWithUser(
 
 open class CitizenRef(
     id: UUID = UUID.randomUUID()
-) : UuidEntity(id),
+) : Entity(id),
     CitizenI
 
-interface CitizenI : UuidEntityI {
+interface CitizenI : EntityI {
     data class Name(
         override val firstName: String,
         override val lastName: String,
@@ -111,7 +109,7 @@ interface CitizenI : UuidEntityI {
 }
 
 @Deprecated("")
-interface CitizenBasicI : CitizenWithUserI, CitizenWithEmail, EntityDeletedAt {
+interface CitizenBasicI : CitizenWithUserI, CitizenWithEmail, DeletedAt {
     val name: Name
     val birthday: DateTime
     val voteAnonymous: Boolean
diff --git a/src/main/kotlin/fr/dcproject/component/citizen/CitizenAccessControl.kt b/src/main/kotlin/fr/dcproject/component/citizen/CitizenAccessControl.kt
index 856ae52..bbaf2ba 100644
--- a/src/main/kotlin/fr/dcproject/component/citizen/CitizenAccessControl.kt
+++ b/src/main/kotlin/fr/dcproject/component/citizen/CitizenAccessControl.kt
@@ -1,14 +1,14 @@
 package fr.dcproject.component.citizen
 
+import fr.dcproject.common.entity.DeletedAt
 import fr.dcproject.common.security.AccessControl
 import fr.dcproject.common.security.AccessResponse
-import fr.postgresjson.entity.EntityDeletedAt
 
 class CitizenAccessControl : AccessControl() {
-    fun <S> canView(subjects: List<S>, connectedCitizen: CitizenI?): AccessResponse where S : CitizenI, S : EntityDeletedAt =
+    fun <S> canView(subjects: List<S>, connectedCitizen: CitizenI?): AccessResponse where S : CitizenI, S : DeletedAt =
         canAll(subjects) { canView(it, connectedCitizen) }
 
-    fun <S> canView(subject: S, connectedCitizen: CitizenI?): AccessResponse where S : CitizenI, S : EntityDeletedAt {
+    fun <S> canView(subject: S, connectedCitizen: CitizenI?): AccessResponse where S : CitizenI, S : DeletedAt {
         if (connectedCitizen == null) return denied("You must be connected to view citizen", "citizen.view.connected")
         return if (subject.isDeleted()) denied("You cannot view a deleted citizen", "citizen.view.deleted")
         else granted()
diff --git a/src/main/kotlin/fr/dcproject/component/comment/article/CommentArticleRepository.kt b/src/main/kotlin/fr/dcproject/component/comment/article/CommentArticleRepository.kt
index fc71b0b..44a4e7e 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/article/CommentArticleRepository.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/article/CommentArticleRepository.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.comment.article
 
+import fr.dcproject.common.entity.EntityI
 import fr.dcproject.common.entity.TargetI
 import fr.dcproject.component.article.ArticleForView
 import fr.dcproject.component.article.ArticleRef
@@ -9,7 +10,6 @@ import fr.dcproject.component.comment.generic.CommentForView
 import fr.dcproject.component.comment.generic.CommentRepositoryAbs
 import fr.postgresjson.connexion.Paginated
 import fr.postgresjson.connexion.Requester
-import fr.postgresjson.entity.UuidEntityI
 import java.util.UUID
 
 class CommentArticleRepository(requester: Requester) : CommentRepositoryAbs<ArticleForView>(requester) {
@@ -36,7 +36,7 @@ class CommentArticleRepository(requester: Requester) : CommentRepositoryAbs<Arti
     }
 
     override fun findByTarget(
-        target: UuidEntityI,
+        target: EntityI,
         page: Int,
         limit: Int,
         sort: Sort
diff --git a/src/main/kotlin/fr/dcproject/component/comment/constitution/CommentConstitutionRepository.kt b/src/main/kotlin/fr/dcproject/component/comment/constitution/CommentConstitutionRepository.kt
index b270af8..36fb618 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/constitution/CommentConstitutionRepository.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/constitution/CommentConstitutionRepository.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.comment.constitution
 
+import fr.dcproject.common.entity.EntityI
 import fr.dcproject.common.entity.TargetI
 import fr.dcproject.component.citizen.CitizenI
 import fr.dcproject.component.citizen.CitizenRef
@@ -9,7 +10,6 @@ import fr.dcproject.component.comment.generic.CommentRepositoryAbs
 import fr.dcproject.component.constitution.ConstitutionRef
 import fr.postgresjson.connexion.Paginated
 import fr.postgresjson.connexion.Requester
-import fr.postgresjson.entity.UuidEntityI
 import java.util.UUID
 
 class CommentConstitutionRepository(requester: Requester) : CommentRepositoryAbs<ConstitutionRef>(requester) {
@@ -36,7 +36,7 @@ class CommentConstitutionRepository(requester: Requester) : CommentRepositoryAbs
     }
 
     override fun findByTarget(
-        target: UuidEntityI,
+        target: EntityI,
         page: Int,
         limit: Int,
         sort: CommentArticleRepository.Sort
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/Comment.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/Comment.kt
index 2eb73a4..4aa9d76 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/generic/Comment.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/generic/Comment.kt
@@ -1,21 +1,17 @@
 package fr.dcproject.component.comment.generic
 
+import fr.dcproject.common.entity.CreatedAt
+import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.DeletedAt
 import fr.dcproject.common.entity.EntityI
 import fr.dcproject.common.entity.ExtraI
 import fr.dcproject.common.entity.HasTarget
 import fr.dcproject.common.entity.TargetI
 import fr.dcproject.common.entity.TargetRef
+import fr.dcproject.common.entity.UpdatedAt
 import fr.dcproject.component.citizen.CitizenRef
 import fr.dcproject.component.vote.entity.Votable
 import fr.dcproject.component.vote.entity.VotableImp
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityCreatedByImp
-import fr.postgresjson.entity.EntityDeletedAt
-import fr.postgresjson.entity.EntityDeletedAtImp
-import fr.postgresjson.entity.EntityUpdatedAt
-import fr.postgresjson.entity.EntityUpdatedAtImp
 import org.joda.time.DateTime
 import java.util.UUID
 
@@ -31,9 +27,9 @@ class CommentForView<T : TargetI, C : CitizenRef>(
     CommentWithParentI<T>,
     CommentForUpdate<T, C>(id, createdBy, target, content, parent, deletedAt),
     CommentWithTargetI<T>,
-    EntityCreatedBy<C> by EntityCreatedByImp(createdBy),
-    EntityUpdatedAt by EntityUpdatedAtImp(),
-    EntityDeletedAt by EntityDeletedAtImp(),
+    CreatedBy<C> by CreatedBy.Imp(createdBy),
+    UpdatedAt by UpdatedAt.Imp(),
+    DeletedAt by DeletedAt.Imp(),
     Votable by VotableImp(),
     TargetI {
     constructor(
@@ -59,9 +55,9 @@ open class CommentForUpdate<T : TargetI, C : CitizenRef>(
     CommentWithParentI<T>,
     ExtraI<T, C>,
     CommentWithTargetI<T>,
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityCreatedBy<C>,
-    EntityDeletedAt,
+    CreatedAt by CreatedAt.Imp(),
+    CreatedBy<C>,
+    DeletedAt,
     TargetI {
     constructor(
         createdBy: C,
@@ -82,7 +78,7 @@ open class CommentParent<T : TargetI>(
 ) : CommentRef(id),
     CommentParentI<T>
 
-interface CommentParentI<T : TargetI> : CommentI, EntityDeletedAt, CommentWithTargetI<T>
+interface CommentParentI<T : TargetI> : CommentI, DeletedAt, CommentWithTargetI<T>
 
 interface CommentWithTargetI<T : TargetI> : CommentI, TargetI, HasTarget<T>
 
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/CommentAccessControl.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/CommentAccessControl.kt
index fd51d11..c5b6ff2 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/generic/CommentAccessControl.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/generic/CommentAccessControl.kt
@@ -1,39 +1,39 @@
 package fr.dcproject.component.comment.generic
 
+import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.DeletedAt
 import fr.dcproject.common.entity.HasTarget
 import fr.dcproject.common.security.AccessControl
 import fr.dcproject.common.security.AccessResponse
 import fr.dcproject.component.citizen.CitizenI
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityDeletedAt
 
 class CommentAccessControl : AccessControl() {
     fun <S> canView(subjects: List<S>, citizen: CitizenI?): AccessResponse
     where S : CommentI,
-          S : EntityDeletedAt = canAll(subjects) { canView(it, citizen) }
+          S : DeletedAt = canAll(subjects) { canView(it, citizen) }
 
     fun <S> canView(subject: S, citizen: CitizenI?): AccessResponse
     where S : CommentI,
-          S : EntityDeletedAt = when {
+          S : DeletedAt = when {
         subject.isDeleted() -> denied("Your cannot view a deleted comment", "comment.view.deleted")
         else -> granted()
     }
 
     fun <S, CR : CitizenI> canCreate(subject: S, citizen: CitizenI?): AccessResponse
     where S : CommentI,
-          S : EntityCreatedBy<CR>,
+          S : CreatedBy<CR>,
           S : CommentWithParentI<*>,
           S : HasTarget<*> = when {
         citizen == null -> denied("You must be connected to create user", "comment.create.notConnected")
         subject.createdBy.id != citizen.id -> denied("You cannot create a comment with other user than yours", "comment.create.wrongUser")
         subject.parent?.isDeleted() ?: false -> denied("You cannot create a comment on deleted parent", "comment.create.deletedParent")
-        subject.target.let { it is EntityDeletedAt && it.isDeleted() } -> denied("You cannot create a comment on deleted target", "comment.create.deletedTarget")
+        subject.target.let { it is DeletedAt && it.isDeleted() } -> denied("You cannot create a comment on deleted target", "comment.create.deletedTarget")
         else -> granted()
     }
 
     fun <S, CR : CitizenI> canUpdate(subject: S, citizen: CitizenI?): AccessResponse
     where S : CommentI,
-          S : EntityCreatedBy<CR> = when {
+          S : CreatedBy<CR> = when {
         citizen == null -> denied("You must be connected to update comment", "comment.update.notConnected")
         citizen.id != subject.createdBy.id -> denied("You cannot update another user of yours", "comment.update.notYours")
         else -> granted()
diff --git a/src/main/kotlin/fr/dcproject/component/comment/generic/CommentRepository.kt b/src/main/kotlin/fr/dcproject/component/comment/generic/CommentRepository.kt
index 2bf94a8..3cc4232 100644
--- a/src/main/kotlin/fr/dcproject/component/comment/generic/CommentRepository.kt
+++ b/src/main/kotlin/fr/dcproject/component/comment/generic/CommentRepository.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.comment.generic
 
+import fr.dcproject.common.entity.EntityI
 import fr.dcproject.common.entity.TargetI
 import fr.dcproject.common.entity.TargetRef
 import fr.dcproject.component.citizen.CitizenI
@@ -7,7 +8,6 @@ import fr.dcproject.component.citizen.CitizenRef
 import fr.dcproject.component.comment.article.CommentArticleRepository
 import fr.postgresjson.connexion.Paginated
 import fr.postgresjson.connexion.Requester
-import fr.postgresjson.entity.UuidEntityI
 import fr.postgresjson.repository.RepositoryI
 import java.util.UUID
 
@@ -44,7 +44,7 @@ abstract class CommentRepositoryAbs<T : TargetI>(override var requester: Request
     }
 
     open fun findByTarget(
-        target: UuidEntityI,
+        target: EntityI,
         page: Int = 1,
         limit: Int = 50,
         sort: CommentArticleRepository.Sort = CommentArticleRepository.Sort.CREATED_AT
diff --git a/src/main/kotlin/fr/dcproject/component/constitution/Constitution.kt b/src/main/kotlin/fr/dcproject/component/constitution/Constitution.kt
index d4bc28a..2d9eba7 100644
--- a/src/main/kotlin/fr/dcproject/component/constitution/Constitution.kt
+++ b/src/main/kotlin/fr/dcproject/component/constitution/Constitution.kt
@@ -1,21 +1,17 @@
 package fr.dcproject.component.constitution
 
+import fr.dcproject.common.entity.CreatedAt
+import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.DeletedAt
+import fr.dcproject.common.entity.Entity
 import fr.dcproject.common.entity.TargetI
 import fr.dcproject.common.entity.TargetRef
+import fr.dcproject.common.entity.VersionableId
 import fr.dcproject.component.article.ArticleForListing
 import fr.dcproject.component.article.ArticleI
 import fr.dcproject.component.citizen.CitizenSimple
 import fr.dcproject.component.citizen.CitizenWithUserI
 import fr.dcproject.component.constitution.ConstitutionSimple.TitleSimple
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityCreatedByImp
-import fr.postgresjson.entity.EntityDeletedAt
-import fr.postgresjson.entity.EntityDeletedAtImp
-import fr.postgresjson.entity.EntityVersioning
-import fr.postgresjson.entity.UuidEntity
-import fr.postgresjson.entity.UuidEntityVersioning
 import java.util.UUID
 
 class Constitution(
@@ -54,10 +50,10 @@ open class ConstitutionSimple<Cr : CitizenWithUserI, T : TitleSimple<*>>(
     override val createdBy: Cr,
     versionId: UUID = UUID.randomUUID()
 ) : ConstitutionRef(id),
-    EntityVersioning<UUID, Int> by UuidEntityVersioning(versionId = versionId, versionNumber = 0),
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityCreatedBy<Cr> by EntityCreatedByImp(createdBy),
-    EntityDeletedAt by EntityDeletedAtImp() {
+    VersionableId by VersionableId.Imp(versionId),
+    CreatedAt by CreatedAt.Imp(),
+    CreatedBy<Cr> by CreatedBy.Imp(createdBy),
+    DeletedAt by DeletedAt.Imp() {
 
     init {
         titles.forEachIndexed { index, title ->
@@ -76,7 +72,7 @@ open class ConstitutionSimple<Cr : CitizenWithUserI, T : TitleSimple<*>>(
 open class ConstitutionRef(id: UUID? = null) : ConstitutionS(id ?: UUID.randomUUID()) {
     open class TitleRef(
         id: UUID = UUID.randomUUID()
-    ) : UuidEntity(id)
+    ) : Entity(id)
 }
 
 sealed class ConstitutionS(id: UUID = UUID.randomUUID()) : TargetRef(id), TargetI
diff --git a/src/main/kotlin/fr/dcproject/component/constitution/ConstitutionAccessControl.kt b/src/main/kotlin/fr/dcproject/component/constitution/ConstitutionAccessControl.kt
index f75dfd3..769395f 100644
--- a/src/main/kotlin/fr/dcproject/component/constitution/ConstitutionAccessControl.kt
+++ b/src/main/kotlin/fr/dcproject/component/constitution/ConstitutionAccessControl.kt
@@ -1,10 +1,10 @@
 package fr.dcproject.component.constitution
 
+import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.DeletedAt
 import fr.dcproject.common.security.AccessControl
 import fr.dcproject.common.security.AccessResponse
 import fr.dcproject.component.citizen.CitizenI
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityDeletedAt
 
 class ConstitutionAccessControl : AccessControl() {
     fun canCreate(subject: ConstitutionS, citizen: CitizenI?): AccessResponse = when {
@@ -15,18 +15,18 @@ class ConstitutionAccessControl : AccessControl() {
     fun <S : ConstitutionSimple<*, *>> canView(subjects: List<S>, citizen: CitizenI?): AccessResponse =
         canAll(subjects) { canView(it, citizen) }
 
-    fun <S> canView(subject: S, citizen: CitizenI?): AccessResponse where S : EntityDeletedAt, S : ConstitutionS = when {
+    fun <S> canView(subject: S, citizen: CitizenI?): AccessResponse where S : DeletedAt, S : ConstitutionS = when {
         subject.isDeleted() -> denied("You cannot view a deleted constitution", "constitution.view.deleted")
         else -> granted()
     }
 
-    fun <S> canDelete(subject: S, citizen: CitizenI?): AccessResponse where S : EntityCreatedBy<CitizenI>, S : ConstitutionRef = when {
+    fun <S> canDelete(subject: S, citizen: CitizenI?): AccessResponse where S : CreatedBy<CitizenI>, S : ConstitutionRef = when {
         citizen == null -> denied("You must be connected to delete constitution", "constitution.delete.notConnected")
         subject.createdBy.id != citizen.id -> denied("You cannot delete the constitution of other citizen", "constitution.delete.otherCitizen")
         else -> granted()
     }
 
-    fun <S> canUpdate(subject: S, citizen: CitizenI?): AccessResponse where S : EntityCreatedBy<CitizenI>, S : ConstitutionRef = when {
+    fun <S> canUpdate(subject: S, citizen: CitizenI?): AccessResponse where S : CreatedBy<CitizenI>, S : ConstitutionRef = when {
         citizen == null -> denied("You must be connected to update constitution", "constitution.update.notConnected")
         subject.createdBy.id != citizen.id -> denied("You cannot update the constitution of other citizen", "constitution.update.otherCitizen")
         else -> granted()
diff --git a/src/main/kotlin/fr/dcproject/component/constitution/routes/CreateConstitution.kt b/src/main/kotlin/fr/dcproject/component/constitution/routes/CreateConstitution.kt
index ba4b9f8..9aaedaa 100644
--- a/src/main/kotlin/fr/dcproject/component/constitution/routes/CreateConstitution.kt
+++ b/src/main/kotlin/fr/dcproject/component/constitution/routes/CreateConstitution.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.constitution.routes
 
+import fr.dcproject.common.entity.Entity
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.utils.receiveOrBadRequest
 import fr.dcproject.component.article.ArticleRef
@@ -13,7 +14,6 @@ import fr.dcproject.component.constitution.ConstitutionSimple
 import fr.dcproject.component.constitution.ConstitutionSimple.TitleSimple
 import fr.dcproject.component.constitution.routes.CreateConstitution.PostConstitutionRequest.Input
 import fr.dcproject.component.constitution.routes.CreateConstitution.PostConstitutionRequest.Input.Title
-import fr.postgresjson.entity.UuidEntity
 import io.ktor.application.call
 import io.ktor.locations.KtorExperimentalLocationsAPI
 import io.ktor.locations.Location
@@ -45,7 +45,7 @@ object CreateConstitution {
                 var name: String,
                 var rank: Int? = null,
                 var articles: MutableList<ArticleRef> = mutableListOf()
-            ) : UuidEntity(id)
+            ) : Entity(id)
         }
     }
 
diff --git a/src/main/kotlin/fr/dcproject/component/follow/Follow.kt b/src/main/kotlin/fr/dcproject/component/follow/Follow.kt
index 4ff4944..3bc05e2 100644
--- a/src/main/kotlin/fr/dcproject/component/follow/Follow.kt
+++ b/src/main/kotlin/fr/dcproject/component/follow/Follow.kt
@@ -1,16 +1,14 @@
 package fr.dcproject.component.follow
 
+import fr.dcproject.common.entity.Created
+import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.EntityI
 import fr.dcproject.common.entity.ExtraI
 import fr.dcproject.common.entity.HasTarget
 import fr.dcproject.common.entity.TargetI
 import fr.dcproject.component.citizen.CitizenBasic
 import fr.dcproject.component.citizen.CitizenBasicI
 import fr.dcproject.component.citizen.CitizenI
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityCreatedByImp
-import fr.postgresjson.entity.UuidEntityI
 import java.util.UUID
 
 @Deprecated("")
@@ -28,8 +26,7 @@ open class FollowSimple<T : TargetI, C : CitizenI>(
     override var target: T
 ) : ExtraI<T, C>,
     FollowRef(id),
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityCreatedBy<C> by EntityCreatedByImp(createdBy)
+    Created<C> by Created.Imp(createdBy)
 
 class FollowForUpdate<T : TargetI, C : CitizenI>(
     id: UUID = UUID.randomUUID(),
@@ -37,10 +34,10 @@ class FollowForUpdate<T : TargetI, C : CitizenI>(
     override val createdBy: C
 ) : FollowRef(id),
     HasTarget<T>,
-    EntityCreatedBy<C> by EntityCreatedByImp<C>(createdBy)
+    CreatedBy<C> by CreatedBy.Imp<C>(createdBy)
 
 open class FollowRef(
     override val id: UUID
 ) : FollowI
 
-interface FollowI : UuidEntityI
+interface FollowI : EntityI
diff --git a/src/main/kotlin/fr/dcproject/component/follow/FollowRepository.kt b/src/main/kotlin/fr/dcproject/component/follow/FollowRepository.kt
index 1914885..f57c6bc 100644
--- a/src/main/kotlin/fr/dcproject/component/follow/FollowRepository.kt
+++ b/src/main/kotlin/fr/dcproject/component/follow/FollowRepository.kt
@@ -1,5 +1,6 @@
 package fr.dcproject.component.follow
 
+import fr.dcproject.common.entity.Entity
 import fr.dcproject.common.entity.TargetRef
 import fr.dcproject.component.article.ArticleForView
 import fr.dcproject.component.article.ArticleRef
@@ -8,7 +9,6 @@ import fr.dcproject.component.citizen.CitizenRef
 import fr.dcproject.component.constitution.ConstitutionRef
 import fr.postgresjson.connexion.Paginated
 import fr.postgresjson.connexion.Requester
-import fr.postgresjson.entity.UuidEntity
 import fr.postgresjson.repository.RepositoryI
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.flow
@@ -71,7 +71,7 @@ sealed class FollowRepository<IN : TargetRef, OUT : TargetRef>(override var requ
             )
 
     fun findFollowsByTarget(
-        target: UuidEntity,
+        target: Entity,
         bulkSize: Int = 300
     ): Flow<FollowSimple<IN, CitizenRef>> = flow {
         var nextPage = 1
@@ -85,7 +85,7 @@ sealed class FollowRepository<IN : TargetRef, OUT : TargetRef>(override var requ
     }
 
     abstract fun findFollowsByTarget(
-        target: UuidEntity,
+        target: Entity,
         page: Int = 1,
         limit: Int = 300
     ): Paginated<FollowSimple<IN, CitizenRef>>
@@ -108,7 +108,7 @@ class FollowArticleRepository(requester: Requester) : FollowRepository<ArticleRe
     }
 
     override fun findFollowsByTarget(
-        target: UuidEntity,
+        target: Entity,
         page: Int,
         limit: Int
     ): Paginated<FollowSimple<ArticleRef, CitizenRef>> {
@@ -139,7 +139,7 @@ class FollowConstitutionRepository(requester: Requester) : FollowRepository<Cons
     }
 
     override fun findFollowsByTarget(
-        target: UuidEntity,
+        target: Entity,
         page: Int,
         limit: Int
     ): Paginated<FollowSimple<ConstitutionRef, CitizenRef>> {
diff --git a/src/main/kotlin/fr/dcproject/component/notification/Notification.kt b/src/main/kotlin/fr/dcproject/component/notification/Notification.kt
index 3ba9d7d..798ff52 100644
--- a/src/main/kotlin/fr/dcproject/component/notification/Notification.kt
+++ b/src/main/kotlin/fr/dcproject/component/notification/Notification.kt
@@ -7,8 +7,8 @@ import com.fasterxml.jackson.databind.module.SimpleModule
 import com.fasterxml.jackson.datatype.joda.JodaModule
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.fasterxml.jackson.module.kotlin.readValue
+import fr.dcproject.common.entity.Entity
 import fr.dcproject.component.article.ArticleForView
-import fr.postgresjson.entity.UuidEntity
 import org.joda.time.DateTime
 import java.util.concurrent.atomic.AtomicInteger
 
@@ -47,7 +47,7 @@ open class Notification(
 }
 
 open class EntityNotification(
-    val target: UuidEntity,
+    val target: Entity,
     type: String,
     val action: String
 ) : Notification(type)
diff --git a/src/main/kotlin/fr/dcproject/component/notification/NotificationEmailSender.kt b/src/main/kotlin/fr/dcproject/component/notification/NotificationEmailSender.kt
index 80e8480..76dd606 100644
--- a/src/main/kotlin/fr/dcproject/component/notification/NotificationEmailSender.kt
+++ b/src/main/kotlin/fr/dcproject/component/notification/NotificationEmailSender.kt
@@ -4,6 +4,7 @@ import com.sendgrid.helpers.mail.Mail
 import com.sendgrid.helpers.mail.objects.Content
 import com.sendgrid.helpers.mail.objects.Email
 import fr.dcproject.common.email.Mailer
+import fr.dcproject.common.entity.EntityI
 import fr.dcproject.common.entity.TargetRef
 import fr.dcproject.component.article.ArticleRepository
 import fr.dcproject.component.article.ArticleWithTitleI
@@ -11,7 +12,6 @@ import fr.dcproject.component.citizen.CitizenBasicI
 import fr.dcproject.component.citizen.CitizenRef
 import fr.dcproject.component.citizen.CitizenRepository
 import fr.dcproject.component.follow.FollowSimple
-import fr.postgresjson.entity.UuidEntityI
 import java.util.UUID
 
 class NotificationEmailSender(
@@ -43,7 +43,7 @@ class NotificationEmailSender(
         }
     }
 
-    private fun generateHtmlContent(citizen: CitizenBasicI, target: UuidEntityI): String? {
+    private fun generateHtmlContent(citizen: CitizenBasicI, target: EntityI): String? {
         return when (target) {
             is ArticleWithTitleI -> """
                 Hello ${citizen.name.getFullName()},<br/>
@@ -53,7 +53,7 @@ class NotificationEmailSender(
         }
     }
 
-    private fun generateContent(citizen: CitizenBasicI, target: UuidEntityI): String {
+    private fun generateContent(citizen: CitizenBasicI, target: EntityI): String {
         return when (target) {
             is ArticleWithTitleI -> """
                 Hello ${citizen.name.getFullName()},
diff --git a/src/main/kotlin/fr/dcproject/component/opinion/OpinionAccessControl.kt b/src/main/kotlin/fr/dcproject/component/opinion/OpinionAccessControl.kt
index a55d908..68068fc 100644
--- a/src/main/kotlin/fr/dcproject/component/opinion/OpinionAccessControl.kt
+++ b/src/main/kotlin/fr/dcproject/component/opinion/OpinionAccessControl.kt
@@ -1,12 +1,12 @@
 package fr.dcproject.component.opinion
 
+import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.DeletedAt
 import fr.dcproject.common.entity.HasTarget
 import fr.dcproject.common.security.AccessControl
 import fr.dcproject.common.security.AccessResponse
 import fr.dcproject.component.citizen.CitizenI
 import fr.dcproject.component.opinion.entity.OpinionI
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityDeletedAt
 
 class OpinionAccessControl : AccessControl() {
 
@@ -17,21 +17,21 @@ class OpinionAccessControl : AccessControl() {
         val target = subject.target
         return when {
             citizen == null -> denied("You must be connected to make an opinion", "opinion.create.notConnected")
-            target is EntityDeletedAt && target.isDeleted() -> denied("You cannot make opinion on deleted target", "opinion.create.deletedTarget")
+            target is DeletedAt && target.isDeleted() -> denied("You cannot make opinion on deleted target", "opinion.create.deletedTarget")
             else -> granted()
         }
     }
 
-    fun <S, SS : List<S>, C : CitizenI> canView(subjects: SS, citizen: CitizenI?): AccessResponse where S : OpinionI, S : EntityCreatedBy<C> =
+    fun <S, SS : List<S>, C : CitizenI> canView(subjects: SS, citizen: CitizenI?): AccessResponse where S : OpinionI, S : CreatedBy<C> =
         canAll(subjects) { canView(it, citizen) }
 
-    fun <S, C : CitizenI> canView(subject: S, citizen: CitizenI?): AccessResponse where S : OpinionI, S : EntityCreatedBy<C> = when {
+    fun <S, C : CitizenI> canView(subject: S, citizen: CitizenI?): AccessResponse where S : OpinionI, S : CreatedBy<C> = when {
         citizen == null -> denied("You must be connected to delete opinion", "opinion.delete.notConnected")
         subject.createdBy.id != citizen.id -> denied("You cannot view opinions of other citizen", "opinion.view.otherCitizen")
         else -> granted()
     }
 
-    fun <S, C : CitizenI> canDelete(subject: S, citizen: CitizenI?): AccessResponse where S : EntityCreatedBy<C>, S : OpinionI = when {
+    fun <S, C : CitizenI> canDelete(subject: S, citizen: CitizenI?): AccessResponse where S : CreatedBy<C>, S : OpinionI = when {
         citizen == null -> denied("You must be connected to delete opinion", "opinion.delete.notConnected")
         subject.createdBy.id != citizen.id -> denied("You can only delete your opinions", "opinion.delete.notYours")
         else -> granted()
diff --git a/src/main/kotlin/fr/dcproject/component/opinion/entity/Opinion.kt b/src/main/kotlin/fr/dcproject/component/opinion/entity/Opinion.kt
index da8bf86..7493bd6 100644
--- a/src/main/kotlin/fr/dcproject/component/opinion/entity/Opinion.kt
+++ b/src/main/kotlin/fr/dcproject/component/opinion/entity/Opinion.kt
@@ -1,5 +1,8 @@
 package fr.dcproject.component.opinion.entity
 
+import fr.dcproject.common.entity.CreatedAt
+import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.EntityI
 import fr.dcproject.common.entity.ExtraI
 import fr.dcproject.common.entity.HasTarget
 import fr.dcproject.common.entity.TargetI
@@ -9,11 +12,6 @@ import fr.dcproject.component.citizen.CitizenBasic
 import fr.dcproject.component.citizen.CitizenBasicI
 import fr.dcproject.component.citizen.CitizenI
 import fr.dcproject.component.citizen.CitizenRef
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityCreatedByImp
-import fr.postgresjson.entity.UuidEntityI
 import java.util.UUID
 
 @Deprecated("")
@@ -24,8 +22,8 @@ open class Opinion<T : TargetI>(
     val choice: OpinionChoice
 ) : OpinionRef(id),
     ExtraI<T, CitizenBasicI>,
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityCreatedBy<CitizenBasicI> by EntityCreatedByImp(createdBy) {
+    CreatedAt by CreatedAt.Imp(),
+    CreatedBy<CitizenBasicI> by CreatedBy.Imp(createdBy) {
 
     fun getName(): String = choice.name
 }
@@ -45,10 +43,10 @@ data class OpinionForUpdate<T : TargetI>(
     override val createdBy: CitizenRef
 ) : OpinionRef(id),
     HasTarget<T>,
-    EntityCreatedBy<CitizenI> by EntityCreatedByImp(createdBy)
+    CreatedBy<CitizenI> by CreatedBy.Imp(createdBy)
 
 open class OpinionRef(
     override val id: UUID
 ) : OpinionI, TargetRef(id)
 
-interface OpinionI : UuidEntityI
+interface OpinionI : EntityI
diff --git a/src/main/kotlin/fr/dcproject/component/opinion/entity/OpinionChoice.kt b/src/main/kotlin/fr/dcproject/component/opinion/entity/OpinionChoice.kt
index 54ad0ae..ef22582 100644
--- a/src/main/kotlin/fr/dcproject/component/opinion/entity/OpinionChoice.kt
+++ b/src/main/kotlin/fr/dcproject/component/opinion/entity/OpinionChoice.kt
@@ -1,11 +1,9 @@
 package fr.dcproject.component.opinion.entity
 
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityDeletedAt
-import fr.postgresjson.entity.EntityDeletedAtImp
-import fr.postgresjson.entity.UuidEntity
-import fr.postgresjson.entity.UuidEntityI
+import fr.dcproject.common.entity.CreatedAt
+import fr.dcproject.common.entity.DeletedAt
+import fr.dcproject.common.entity.Entity
+import fr.dcproject.common.entity.EntityI
 import java.util.UUID
 
 class OpinionChoice(
@@ -13,12 +11,12 @@ class OpinionChoice(
     val name: String,
     val target: List<String>?
 ) : OpinionChoiceRef(id),
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityDeletedAt by EntityDeletedAtImp()
+    CreatedAt by CreatedAt.Imp(),
+    DeletedAt by DeletedAt.Imp()
 
 open class OpinionChoiceRef(
     id: UUID?
 ) : OpinionChoiceI,
-    UuidEntity(id ?: UUID.randomUUID())
+    Entity(id ?: UUID.randomUUID())
 
-interface OpinionChoiceI : UuidEntityI
+interface OpinionChoiceI : EntityI
diff --git a/src/main/kotlin/fr/dcproject/component/views/entity/ViewAggregation.kt b/src/main/kotlin/fr/dcproject/component/views/entity/ViewAggregation.kt
index 36019ab..f9e5f95 100644
--- a/src/main/kotlin/fr/dcproject/component/views/entity/ViewAggregation.kt
+++ b/src/main/kotlin/fr/dcproject/component/views/entity/ViewAggregation.kt
@@ -1,13 +1,12 @@
 package fr.dcproject.component.views.entity
 
+import fr.dcproject.common.entity.UpdatedAt
 import fr.postgresjson.entity.EntityI
-import fr.postgresjson.entity.EntityUpdatedAt
-import fr.postgresjson.entity.EntityUpdatedAtImp
 
 class ViewAggregation(
     val total: Int,
     val unique: Int
 ) : EntityI,
-    EntityUpdatedAt by EntityUpdatedAtImp() {
+    UpdatedAt by UpdatedAt.Imp() {
     constructor() : this(0, 0)
 }
diff --git a/src/main/kotlin/fr/dcproject/component/vote/VoteAccessControl.kt b/src/main/kotlin/fr/dcproject/component/vote/VoteAccessControl.kt
index ead8566..4a9c800 100644
--- a/src/main/kotlin/fr/dcproject/component/vote/VoteAccessControl.kt
+++ b/src/main/kotlin/fr/dcproject/component/vote/VoteAccessControl.kt
@@ -1,15 +1,15 @@
 package fr.dcproject.component.vote
 
+import fr.dcproject.common.entity.DeletedAt
 import fr.dcproject.common.entity.TargetI
 import fr.dcproject.common.security.AccessControl
 import fr.dcproject.common.security.AccessResponse
 import fr.dcproject.component.citizen.CitizenI
 import fr.dcproject.component.vote.entity.VoteForUpdateI
-import fr.postgresjson.entity.EntityDeletedAt
 import fr.dcproject.component.vote.entity.Vote as VoteEntity
 
 class VoteAccessControl : AccessControl() {
-    fun <S> canCreate(subject: VoteForUpdateI<S, *>, citizen: CitizenI?): AccessResponse where S : EntityDeletedAt, S : TargetI = when {
+    fun <S> canCreate(subject: VoteForUpdateI<S, *>, citizen: CitizenI?): AccessResponse where S : DeletedAt, S : TargetI = when {
         citizen == null -> denied("You must be connected for vote", "vote.create.connected")
         subject.target.isDeleted() -> denied("You cannot vote on deleted target", "vote.create.isDeleted")
         else -> granted()
diff --git a/src/main/kotlin/fr/dcproject/component/vote/entity/Vote.kt b/src/main/kotlin/fr/dcproject/component/vote/entity/Vote.kt
index 5d2a1a8..229c5c2 100644
--- a/src/main/kotlin/fr/dcproject/component/vote/entity/Vote.kt
+++ b/src/main/kotlin/fr/dcproject/component/vote/entity/Vote.kt
@@ -1,18 +1,15 @@
 package fr.dcproject.component.vote.entity
 
+import fr.dcproject.common.entity.CreatedAt
+import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.EntityI
 import fr.dcproject.common.entity.ExtraI
 import fr.dcproject.common.entity.HasTarget
 import fr.dcproject.common.entity.TargetI
+import fr.dcproject.common.entity.UpdatedAt
 import fr.dcproject.component.citizen.CitizenBasic
 import fr.dcproject.component.citizen.CitizenBasicI
 import fr.dcproject.component.citizen.CitizenI
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityCreatedByImp
-import fr.postgresjson.entity.EntityUpdatedAt
-import fr.postgresjson.entity.EntityUpdatedAtImp
-import fr.postgresjson.entity.UuidEntityI
 import java.util.UUID
 
 @Deprecated("")
@@ -24,9 +21,9 @@ class Vote<T : TargetI>(
     var anonymous: Boolean = true
 ) : ExtraI<T, CitizenBasicI>,
     VoteRef(id),
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityCreatedBy<CitizenBasicI> by EntityCreatedByImp(createdBy),
-    EntityUpdatedAt by EntityUpdatedAtImp() {
+    CreatedAt by CreatedAt.Imp(),
+    CreatedBy<CitizenBasicI> by CreatedBy.Imp(createdBy),
+    UpdatedAt by UpdatedAt.Imp() {
     init {
         if (note > 1 && note < -1) {
             error("note must be 1, 0 or -1")
@@ -41,9 +38,9 @@ class VoteForUpdate<T : TargetI, C : CitizenI>(
     override val createdBy: C
 ) : VoteRef(id),
     VoteForUpdateI<T, C>,
-    EntityCreatedBy<C> by EntityCreatedByImp<C>(createdBy)
+    CreatedBy<C> by CreatedBy.Imp<C>(createdBy)
 
-interface VoteForUpdateI<T : TargetI, C : CitizenI> : VoteI, HasTarget<T>, EntityCreatedBy<C> {
+interface VoteForUpdateI<T : TargetI, C : CitizenI> : VoteI, HasTarget<T>, CreatedBy<C> {
     override val id: UUID
     val note: Int
     override val target: T
@@ -54,4 +51,4 @@ open class VoteRef(
     override val id: UUID
 ) : VoteI
 
-interface VoteI : UuidEntityI
+interface VoteI : EntityI
diff --git a/src/main/kotlin/fr/dcproject/component/vote/entity/VoteAggregation.kt b/src/main/kotlin/fr/dcproject/component/vote/entity/VoteAggregation.kt
index 52930c2..fc24668 100644
--- a/src/main/kotlin/fr/dcproject/component/vote/entity/VoteAggregation.kt
+++ b/src/main/kotlin/fr/dcproject/component/vote/entity/VoteAggregation.kt
@@ -1,8 +1,6 @@
 package fr.dcproject.component.vote.entity
 
-import fr.postgresjson.entity.EntityI
-import fr.postgresjson.entity.EntityUpdatedAt
-import fr.postgresjson.entity.EntityUpdatedAtImp
+import fr.dcproject.common.entity.UpdatedAt
 
 class VoteAggregation(
     val up: Int,
@@ -10,7 +8,7 @@ class VoteAggregation(
     val down: Int,
     val total: Int,
     val score: Int
-) : EntityI,
-    EntityUpdatedAt by EntityUpdatedAtImp() {
+) : fr.postgresjson.entity.EntityI,
+    UpdatedAt by UpdatedAt.Imp() {
     constructor() : this(0, 0, 0, 0, 0)
 }
diff --git a/src/main/kotlin/fr/dcproject/component/workgroup/Workgroup.kt b/src/main/kotlin/fr/dcproject/component/workgroup/Workgroup.kt
index b7810b2..44578df 100644
--- a/src/main/kotlin/fr/dcproject/component/workgroup/Workgroup.kt
+++ b/src/main/kotlin/fr/dcproject/component/workgroup/Workgroup.kt
@@ -1,22 +1,18 @@
 package fr.dcproject.component.workgroup
 
+import fr.dcproject.common.entity.CreatedAt
+import fr.dcproject.common.entity.CreatedBy
+import fr.dcproject.common.entity.DeletedAt
+import fr.dcproject.common.entity.Entity
+import fr.dcproject.common.entity.EntityI
+import fr.dcproject.common.entity.UpdatedAt
 import fr.dcproject.component.auth.UserI
 import fr.dcproject.component.citizen.CitizenBasicI
 import fr.dcproject.component.citizen.CitizenI
 import fr.dcproject.component.citizen.CitizenWithUserI
 import fr.dcproject.component.workgroup.WorkgroupWithMembersI.Member
 import fr.dcproject.component.workgroup.WorkgroupWithMembersI.Member.Role
-import fr.postgresjson.entity.EntityCreatedAt
-import fr.postgresjson.entity.EntityCreatedAtImp
-import fr.postgresjson.entity.EntityCreatedBy
-import fr.postgresjson.entity.EntityCreatedByImp
-import fr.postgresjson.entity.EntityDeletedAt
-import fr.postgresjson.entity.EntityDeletedAtImp
-import fr.postgresjson.entity.EntityI
-import fr.postgresjson.entity.EntityUpdatedAt
-import fr.postgresjson.entity.EntityUpdatedAtImp
-import fr.postgresjson.entity.UuidEntity
-import fr.postgresjson.entity.UuidEntityI
+import fr.postgresjson.entity.Serializable
 import java.util.UUID
 
 @Deprecated("")
@@ -37,8 +33,8 @@ data class Workgroup <C : CitizenBasicI>(
         anonymous,
         createdBy
     ),
-    EntityCreatedAt by EntityCreatedAtImp(),
-    EntityUpdatedAt by EntityUpdatedAtImp()
+    CreatedAt by CreatedAt.Imp(),
+    UpdatedAt by UpdatedAt.Imp()
 
 @Deprecated("")
 open class WorkgroupSimple<Z : CitizenI>(
@@ -49,22 +45,22 @@ open class WorkgroupSimple<Z : CitizenI>(
     open var anonymous: Boolean = true,
     createdBy: Z
 ) : WorkgroupRef(id),
-    EntityCreatedBy<Z> by EntityCreatedByImp(createdBy),
-    EntityDeletedAt by EntityDeletedAtImp()
+    CreatedBy<Z> by CreatedBy.Imp(createdBy),
+    DeletedAt by DeletedAt.Imp()
 
 class WorkgroupCart(
     override val id: UUID,
     override val name: String
 ) : WorkgroupCartI
 
-interface WorkgroupCartI : UuidEntityI {
+interface WorkgroupCartI : EntityI {
     val name: String
 }
 open class WorkgroupRef(
     id: UUID? = null
-) : UuidEntity(id ?: UUID.randomUUID()), WorkgroupI
+) : Entity(id ?: UUID.randomUUID()), WorkgroupI
 
-interface WorkgroupWithAuthI<Z : CitizenWithUserI> : WorkgroupWithMembersI<Z>, EntityCreatedBy<Z>, EntityDeletedAt {
+interface WorkgroupWithAuthI<Z : CitizenWithUserI> : WorkgroupWithMembersI<Z>, CreatedBy<Z>, DeletedAt {
     val anonymous: Boolean
 
     fun isMember(user: UserI): Boolean = members.isMember(user)
@@ -83,7 +79,7 @@ interface WorkgroupWithMembersI<Z : CitizenI> : WorkgroupI {
     class Member<C : CitizenI> (
         val citizen: C,
         val roles: List<Role> = emptyList()
-    ) : EntityI {
+    ) : fr.postgresjson.entity.EntityI {
         enum class Role {
             MASTER,
             MANAGER,
@@ -113,4 +109,4 @@ fun <Z : CitizenWithUserI> List<Member<Z>>.getRoles(user: UserI): List<Role> =
 fun <Z : CitizenWithUserI> List<Member<Z>>.getRoles(citizen: CitizenI): List<Role> =
     firstOrNull { it.citizen.id == citizen.id }?.roles ?: emptyList()
 
-interface WorkgroupI : UuidEntityI
+interface WorkgroupI : EntityI