diff --git a/src/server/data.rs b/src/server/data.rs
index 63f0552..ba994f8 100644
--- a/src/server/data.rs
+++ b/src/server/data.rs
@@ -7,6 +7,7 @@ use std::{
 use generational_arena::{
     Arena, Index,
 };
+use bitflags::bitflags;
 use cryptohelpers::{
     rsa::{
 	RsaPublicKey, RsaPrivateKey,
@@ -82,6 +83,20 @@ pub enum MaybeEncrypted
     Unencrypted(Data),
 }
 
+bitflags! {
+    /// And additional metadata for values
+    #[derive(Serialize, Deserialize)]
+    struct Tags: u16
+    {
+	/// Default
+	const NONE = 0;
+	/// This value should be cloned on write unless specified elsewhere.
+	const COW =    1<<0;
+	/// This should not show up in searches
+	const HIDDEN = 1<<1;
+    }
+}
+
 /// Information about a map entry.
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Info
@@ -92,7 +107,8 @@ pub struct Info
     modified: u64,
 
     enable_versioning: bool,
-    hidden: bool,
+
+    tags: Tags,
 
     owner: Option<Vec<user::EntityID>>, //starts as the user that created (i.e. same as `created_by`), or `None` if ownership is disabled
     signed: Option<Vec<Signature>>,
diff --git a/src/server/user.rs b/src/server/user.rs
index 6146be8..f14e84f 100644
--- a/src/server/user.rs
+++ b/src/server/user.rs
@@ -245,7 +245,7 @@ impl EntityID
 bitflags! {
     /// A permission a user or group has for a data item.
     #[derive(Serialize, Deserialize)]
-    struct Permission: u32 {
+    struct Permission: u16 {
 	/// Cannot read or write the item.
 	///
 	/// However they can see it, unless it is marked "hidden".