diff --git a/arn/AMV.go b/arn/AMV.go
index da2ab0c9..b9852108 100644
--- a/arn/AMV.go
+++ b/arn/AMV.go
@@ -17,9 +17,9 @@ import (
 type AMV struct {
 	File           string     `json:"file" editable:"true" type:"upload" filetype:"video" endpoint:"/api/upload/amv/:id/file"`
 	Title          AMVTitle   `json:"title" editable:"true"`
-	MainAnimeID    string     `json:"mainAnimeId" editable:"true"`
-	ExtraAnimeIDs  []string   `json:"extraAnimeIds" editable:"true"`
-	VideoEditorIDs []string   `json:"videoEditorIds" editable:"true"`
+	MainAnimeID    AnimeID    `json:"mainAnimeId" editable:"true"`
+	ExtraAnimeIDs  []AnimeID  `json:"extraAnimeIds" editable:"true"`
+	VideoEditorIDs []UserID   `json:"videoEditorIds" editable:"true"`
 	Links          []Link     `json:"links" editable:"true"`
 	Tags           []string   `json:"tags" editable:"true"`
 	Info           video.Info `json:"info"`
diff --git a/arn/Activity.go b/arn/Activity.go
index 282e024c..12d395b4 100644
--- a/arn/Activity.go
+++ b/arn/Activity.go
@@ -12,7 +12,7 @@ import (
 type Activity interface {
 	Creator() *User
 	TypeName() string
-	GetID() string
+	GetID() ID
 	GetCreated() string
 	GetCreatedBy() UserID
 	GetCreatedTime() time.Time
diff --git a/arn/ActivityCreate.go b/arn/ActivityCreate.go
index ba3f771b..f9db80aa 100644
--- a/arn/ActivityCreate.go
+++ b/arn/ActivityCreate.go
@@ -5,7 +5,7 @@ import "github.com/aerogo/nano"
 // ActivityCreate is a user activity that creates something.
 type ActivityCreate struct {
 	ObjectType string `json:"objectType"`
-	ObjectID   string `json:"objectId"`
+	ObjectID   ID     `json:"objectId"`
 
 	hasID
 	hasCreator
diff --git a/arn/Analytics.go b/arn/Analytics.go
index 29691e3e..d9bf04d5 100644
--- a/arn/Analytics.go
+++ b/arn/Analytics.go
@@ -4,7 +4,7 @@ import "github.com/aerogo/nano"
 
 // Analytics stores user-related statistics.
 type Analytics struct {
-	UserID     string              `json:"userId" primary:"true"`
+	UserID     UserID              `json:"userId" primary:"true"`
 	General    GeneralAnalytics    `json:"general"`
 	Screen     ScreenAnalytics     `json:"screen"`
 	System     SystemAnalytics     `json:"system"`
diff --git a/arn/Anime.go b/arn/Anime.go
index 8df120c5..77f074ca 100644
--- a/arn/Anime.go
+++ b/arn/Anime.go
@@ -71,7 +71,7 @@ func init() {
 }
 
 // AnimeID represents an anime ID.
-type AnimeID = string
+type AnimeID = ID
 
 // Anime represents an anime.
 type Anime struct {
@@ -102,15 +102,12 @@ type Anime struct {
 	hasDraft
 
 	// Company IDs
-	StudioIDs   []string `json:"studios" editable:"true"`
-	ProducerIDs []string `json:"producers" editable:"true"`
-	LicensorIDs []string `json:"licensors" editable:"true"`
+	StudioIDs   []CompanyID `json:"studios" editable:"true"`
+	ProducerIDs []CompanyID `json:"producers" editable:"true"`
+	LicensorIDs []CompanyID `json:"licensors" editable:"true"`
 
 	// Links to external websites
 	Links []*Link `json:"links" editable:"true"`
-
-	// SynopsisSource string        `json:"synopsisSource" editable:"true"`
-	// Hashtag        string        `json:"hashtag"`
 }
 
 // NewAnime creates a new anime.
diff --git a/arn/Character.go b/arn/Character.go
index 0c775a49..fc189294 100644
--- a/arn/Character.go
+++ b/arn/Character.go
@@ -8,11 +8,14 @@ import (
 	"github.com/aerogo/nano"
 )
 
+// CharacterID represents a character ID.
+type CharacterID = ID
+
 // Character represents an anime or manga character.
 type Character struct {
 	Name        CharacterName         `json:"name" editable:"true"`
 	Image       Image                 `json:"image"`
-	MainQuoteID string                `json:"mainQuoteId" editable:"true"`
+	MainQuoteID QuoteID               `json:"mainQuoteId" editable:"true"`
 	Description string                `json:"description" editable:"true" type:"textarea"`
 	Spoilers    []Spoiler             `json:"spoilers" editable:"true"`
 	Attributes  []*CharacterAttribute `json:"attributes" editable:"true"`
diff --git a/arn/Company.go b/arn/Company.go
index 98d4966f..9981862d 100644
--- a/arn/Company.go
+++ b/arn/Company.go
@@ -6,6 +6,9 @@ import (
 	"github.com/aerogo/nano"
 )
 
+// CompanyID represents a company ID.
+type CompanyID = ID
+
 // Company represents an anime studio, producer or licensor.
 type Company struct {
 	Name        CompanyName `json:"name" editable:"true"`
diff --git a/arn/EditLogEntry.go b/arn/EditLogEntry.go
index 04ba7109..d8a2add2 100644
--- a/arn/EditLogEntry.go
+++ b/arn/EditLogEntry.go
@@ -9,21 +9,24 @@ import (
 
 // EditLogEntry is an entry in the editor log.
 type EditLogEntry struct {
-	ID         string `json:"id" primary:"true"`
-	UserID     string `json:"userId"`
+	UserID     UserID `json:"userId"`
 	Action     string `json:"action"`
+	ObjectID   ID     `json:"objectId"`   // The ID of what was edited
 	ObjectType string `json:"objectType"` // The typename of what was edited
-	ObjectID   string `json:"objectId"`   // The ID of what was edited
 	Key        string `json:"key"`
 	OldValue   string `json:"oldValue"`
 	NewValue   string `json:"newValue"`
 	Created    string `json:"created"`
+
+	hasID
 }
 
-// NewEditLogEntry ...
-func NewEditLogEntry(userID, action, objectType, objectID, key, oldValue, newValue string) *EditLogEntry {
+// NewEditLogEntry creates a new edit log entry.
+func NewEditLogEntry(userID UserID, action string, objectType string, objectID ID, key string, oldValue string, newValue string) *EditLogEntry {
 	return &EditLogEntry{
-		ID:         GenerateID("EditLogEntry"),
+		hasID: hasID{
+			ID: GenerateID("EditLogEntry"),
+		},
 		UserID:     userID,
 		Action:     action,
 		ObjectType: objectType,
diff --git a/arn/Episode.go b/arn/Episode.go
index 75c5a1c0..06abcca3 100644
--- a/arn/Episode.go
+++ b/arn/Episode.go
@@ -7,14 +7,18 @@ import (
 	"github.com/animenotifier/notify.moe/arn/validate"
 )
 
+// EpisodeID represents an episode ID.
+type EpisodeID = ID
+
 // Episode represents a single episode for an anime.
 type Episode struct {
-	ID         string            `json:"id" primary:"true"`
 	AnimeID    AnimeID           `json:"animeId"`
 	Number     int               `json:"number" editable:"true"`
 	Title      EpisodeTitle      `json:"title" editable:"true"`
 	AiringDate AiringDate        `json:"airingDate" editable:"true"`
 	Links      map[string]string `json:"links"`
+
+	hasID
 }
 
 // EpisodeTitle contains the title information for an anime episode.
@@ -27,7 +31,9 @@ type EpisodeTitle struct {
 // NewAnimeEpisode creates a new anime episode.
 func NewAnimeEpisode() *Episode {
 	return &Episode{
-		ID:     GenerateID("Episode"),
+		hasID: hasID{
+			ID: GenerateID("Episode"),
+		},
 		Number: -1,
 	}
 }
diff --git a/arn/Group.go b/arn/Group.go
index a9703476..427b18ea 100644
--- a/arn/Group.go
+++ b/arn/Group.go
@@ -11,6 +11,9 @@ import (
 	"github.com/akyoto/color"
 )
 
+// GroupID represents a group ID.
+type GroupID = ID
+
 // Group represents a group of users.
 type Group struct {
 	Name        string         `json:"name" editable:"true"`
@@ -21,7 +24,7 @@ type Group struct {
 	Restricted  bool           `json:"restricted" editable:"true" tooltip:"Restricted groups can only be joined with the founder's permission."`
 	Tags        []string       `json:"tags" editable:"true"`
 	Members     []*GroupMember `json:"members"`
-	Neighbors   []string       `json:"neighbors"`
+	Neighbors   []GroupID      `json:"neighbors"`
 	// Applications []UserApplication `json:"applications"`
 
 	// Mixins
diff --git a/arn/HasEditor.go b/arn/HasEditor.go
index c4b26108..49b88130 100644
--- a/arn/HasEditor.go
+++ b/arn/HasEditor.go
@@ -3,7 +3,7 @@ package arn
 // HasEditor includes user ID and date for the last edit of this object.
 type hasEditor struct {
 	Edited   string `json:"edited"`
-	EditedBy string `json:"editedBy"`
+	EditedBy UserID `json:"editedBy"`
 }
 
 // Editor returns the user who last edited this object.
diff --git a/arn/HasID.go b/arn/HasID.go
index f69e0603..9dc3cb7f 100644
--- a/arn/HasID.go
+++ b/arn/HasID.go
@@ -2,10 +2,10 @@ package arn
 
 // hasID includes an object ID.
 type hasID struct {
-	ID string `json:"id" primary:"true"`
+	ID ID `json:"id" primary:"true"`
 }
 
 // GetID returns the ID.
-func (obj *hasID) GetID() string {
+func (obj *hasID) GetID() ID {
 	return obj.ID
 }
diff --git a/arn/HasLikes.go b/arn/HasLikes.go
index f2e426bf..a3d5b40c 100644
--- a/arn/HasLikes.go
+++ b/arn/HasLikes.go
@@ -2,7 +2,7 @@ package arn
 
 // HasLikes implements common like and unlike methods.
 type hasLikes struct {
-	Likes []string `json:"likes"`
+	Likes []UserID `json:"likes"`
 }
 
 // Like makes the given user ID like the object.
diff --git a/arn/HasPosts.go b/arn/HasPosts.go
index ca731500..7be8410e 100644
--- a/arn/HasPosts.go
+++ b/arn/HasPosts.go
@@ -6,7 +6,7 @@ import (
 
 // HasPosts includes a list of Post IDs.
 type hasPosts struct {
-	PostIDs []string `json:"posts"`
+	PostIDs []PostID `json:"posts"`
 }
 
 // AddPost adds a post to the object.
diff --git a/arn/ID.go b/arn/ID.go
new file mode 100644
index 00000000..b639b865
--- /dev/null
+++ b/arn/ID.go
@@ -0,0 +1,4 @@
+package arn
+
+// ID is used for object identification and is simply a string.
+type ID = string
diff --git a/arn/Notification.go b/arn/Notification.go
index 333edb72..58c477cf 100644
--- a/arn/Notification.go
+++ b/arn/Notification.go
@@ -9,7 +9,7 @@ import (
 
 // Notification represents a user-associated notification.
 type Notification struct {
-	UserID  string `json:"userId"`
+	UserID  UserID `json:"userId"`
 	Created string `json:"created"`
 	Seen    string `json:"seen"`
 
diff --git a/arn/PayPalPayment.go b/arn/PayPalPayment.go
index 42930ad4..bdfc7c9b 100644
--- a/arn/PayPalPayment.go
+++ b/arn/PayPalPayment.go
@@ -8,7 +8,7 @@ import (
 
 // PayPalPayment is an approved and exeucted PayPal payment.
 type PayPalPayment struct {
-	UserID   string `json:"userId"`
+	UserID   UserID `json:"userId"`
 	PayerID  string `json:"payerId"`
 	Amount   string `json:"amount"`
 	Currency string `json:"currency"`
diff --git a/arn/Post.go b/arn/Post.go
index 20a3511a..37354a4d 100644
--- a/arn/Post.go
+++ b/arn/Post.go
@@ -10,10 +10,13 @@ import (
 	"github.com/aerogo/nano"
 )
 
+// PostID represents a post ID.
+type PostID = ID
+
 // Post is a comment related to any parent type in the database.
 type Post struct {
 	Tags       []string `json:"tags" editable:"true"`
-	ParentID   string   `json:"parentId" editable:"true"`
+	ParentID   ID       `json:"parentId" editable:"true"`
 	ParentType string   `json:"parentType"`
 	Edited     string   `json:"edited"`
 
diff --git a/arn/Postable.go b/arn/Postable.go
index 5e8bab03..4423ead6 100644
--- a/arn/Postable.go
+++ b/arn/Postable.go
@@ -19,10 +19,10 @@ type Postable interface {
 
 	// Use Get prefix for these to avoid a
 	// name clash with the internal fields.
-	GetID() string
+	GetID() ID
 	GetText() string
 	GetCreated() string
-	GetParentID() string
+	GetParentID() ID
 	GetParentType() string
 }
 
diff --git a/arn/Purchase.go b/arn/Purchase.go
index 0dfe4239..adf7d9a6 100644
--- a/arn/Purchase.go
+++ b/arn/Purchase.go
@@ -4,8 +4,8 @@ import "github.com/aerogo/nano"
 
 // Purchase represents an item purchase by a user.
 type Purchase struct {
-	UserID   string `json:"userId"`
-	ItemID   string `json:"itemId"`
+	UserID   UserID `json:"userId"`
+	ItemID   ID     `json:"itemId"`
 	Quantity int    `json:"quantity"`
 	Price    int    `json:"price"`
 	Currency string `json:"currency"`
diff --git a/arn/Quote.go b/arn/Quote.go
index e819152c..49dbad53 100644
--- a/arn/Quote.go
+++ b/arn/Quote.go
@@ -10,13 +10,16 @@ import (
 	"github.com/akyoto/color"
 )
 
+// QuoteID represents a quote ID.
+type QuoteID = ID
+
 // Quote is a quote made by a character in an anime.
 type Quote struct {
-	Text          QuoteText `json:"text" editable:"true"`
-	CharacterID   string    `json:"characterId" editable:"true"`
-	AnimeID       AnimeID   `json:"animeId" editable:"true"`
-	EpisodeNumber int       `json:"episode" editable:"true"`
-	Time          int       `json:"time" editable:"true"`
+	Text          QuoteText   `json:"text" editable:"true"`
+	CharacterID   CharacterID `json:"characterId" editable:"true"`
+	AnimeID       AnimeID     `json:"animeId" editable:"true"`
+	EpisodeNumber int         `json:"episode" editable:"true"`
+	Time          int         `json:"time" editable:"true"`
 
 	hasID
 	hasPosts
diff --git a/arn/Session.go b/arn/Session.go
index 0ec670f6..588a2321 100644
--- a/arn/Session.go
+++ b/arn/Session.go
@@ -1,4 +1,7 @@
 package arn
 
+// SessionID represents a session ID.
+type SessionID = ID
+
 // Session stores session-related data.
-type Session map[string]interface{}
+type Session map[SessionID]interface{}
diff --git a/arn/Settings.go b/arn/Settings.go
index 7da8b032..0e0ac705 100644
--- a/arn/Settings.go
+++ b/arn/Settings.go
@@ -29,7 +29,7 @@ const (
 
 // Settings represents user settings.
 type Settings struct {
-	UserID        string               `json:"userId" primary:"true"`
+	UserID        UserID               `json:"userId" primary:"true"`
 	SortBy        string               `json:"sortBy" editable:"true"`
 	TitleLanguage string               `json:"titleLanguage" editable:"true"`
 	Providers     ServiceProviders     `json:"providers"`
diff --git a/arn/Thread.go b/arn/Thread.go
index 05734f88..aa98e402 100644
--- a/arn/Thread.go
+++ b/arn/Thread.go
@@ -7,6 +7,9 @@ import (
 	"github.com/aerogo/nano"
 )
 
+// ThreadID represents a thread ID.
+type ThreadID = ID
+
 // Thread is a forum thread.
 type Thread struct {
 	Title  string   `json:"title" editable:"true"`
diff --git a/arn/User.go b/arn/User.go
index ac52d9c6..d1add695 100644
--- a/arn/User.go
+++ b/arn/User.go
@@ -33,7 +33,7 @@ func init() {
 }
 
 // UserID represents a user ID.
-type UserID = string
+type UserID = ID
 
 // User is a registered person.
 type User struct {
diff --git a/arn/Utils.go b/arn/Utils.go
index 317a72e4..04791f6b 100644
--- a/arn/Utils.go
+++ b/arn/Utils.go
@@ -32,7 +32,7 @@ var (
 )
 
 // GenerateID generates a unique ID for a given collection.
-func GenerateID(collection string) string {
+func GenerateID(collection string) ID {
 	id, _ := shortid.Generate()
 
 	// Retry until we find an unused ID