diff --git a/backend/models/models.go b/backend/models/models.go
index 3172d23..d411c99 100644
--- a/backend/models/models.go
+++ b/backend/models/models.go
@@ -1,6 +1,7 @@
 package models
 
 import (
+	"encoding/json"
 	"time"
 
 	"github.com/jackc/pgx/v5/pgtype"
@@ -16,43 +17,83 @@ type MIME struct {
 	Extension string `json:"extension"`
 }
 
-type Category struct {
-	ID        string      `json:"id"`
-	Name      string      `json:"name"`
-	Color     pgtype.Text `json:"color"`
-	CreatedAt time.Time   `json:"created_at"`
-	Creator   User        `json:"creator"`
-}
+type (
+	CategoryCore struct {
+		ID    string      `json:"id"`
+		Name  string      `json:"name"`
+		Color pgtype.Text `json:"color"`
+	}
+	CategoryItem struct {
+		CategoryCore
+	}
+	CategoryFull struct {
+		CategoryCore
+		CreatedAt time.Time   `json:"created_at"`
+		Creator   User        `json:"creator"`
+		Notes     pgtype.Text `json:"notes"`
+	}
+)
 
-type File struct {
-	ID        string      `json:"id"`
-	Name      pgtype.Text `json:"name"`
-	MIME      MIME        `json:"mime"`
-	CreatedAt time.Time   `json:"created_at"`
-	Creator   User        `json:"creator"`
-}
+type (
+	FileCore struct {
+		ID   string      `json:"id"`
+		Name pgtype.Text `json:"name"`
+		MIME MIME        `json:"mime"`
+	}
+	FileItem struct {
+		FileCore
+		CreatedAt time.Time `json:"created_at"`
+		Creator   User      `json:"creator"`
+	}
+	FileFull struct {
+		FileCore
+		CreatedAt time.Time        `json:"created_at"`
+		Creator   User             `json:"creator"`
+		Notes     pgtype.Text      `json:"notes"`
+		Metadata  *json.RawMessage `json:"metadata"`
+	}
+)
 
-type Tag struct {
-	ID        string      `json:"id"`
-	Name      string      `json:"name"`
-	Color     pgtype.Text `json:"color"`
-	Category  Category    `json:"category"`
-	CreatedAt time.Time   `json:"created_at"`
-	Creator   User        `json:"creator"`
-}
+type (
+	TagCore struct {
+		ID    string      `json:"id"`
+		Name  string      `json:"name"`
+		Color pgtype.Text `json:"color"`
+	}
+	TagItem struct {
+		TagCore
+		Category CategoryCore `json:"category"`
+	}
+	TagFull struct {
+		TagCore
+		Category  CategoryCore `json:"category"`
+		CreatedAt time.Time    `json:"created_at"`
+		Creator   User         `json:"creator"`
+		Notes     pgtype.Text  `json:"notes"`
+	}
+)
 
 type Autotag struct {
-	TriggerTag Tag  `json:"trigger_tag"`
-	AddTag     Tag  `json:"add_tag"`
-	IsActive   bool `json:"is_active"`
+	TriggerTag TagCore `json:"trigger_tag"`
+	AddTag     TagCore `json:"add_tag"`
+	IsActive   bool    `json:"is_active"`
 }
 
-type Pool struct {
-	ID        string    `json:"id"`
-	Name      string    `json:"name"`
-	CreatedAt time.Time `json:"created_at"`
-	Creator   User      `json:"creator"`
-}
+type (
+	PoolCore struct {
+		ID   string `json:"id"`
+		Name string `json:"name"`
+	}
+	PoolItem struct {
+		PoolCore
+	}
+	PoolFull struct {
+		PoolCore
+		CreatedAt time.Time   `json:"created_at"`
+		Creator   User        `json:"creator"`
+		Notes     pgtype.Text `json:"notes"`
+	}
+)
 
 type Session struct {
 	ID           int       `json:"id"`