diff --git a/src/entity.rs b/src/entity.rs
index 211d59d..2968946 100755
--- a/src/entity.rs
+++ b/src/entity.rs
@@ -24,6 +24,8 @@ pub struct Entity {
 }
 
 /// The type of entity: normal entity with a Qid, a property with a Pid, or a lexeme with a Lid.
+///
+/// EntitySchemas (with E IDs) are currently unsupported.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
 #[non_exhaustive]
 pub enum EntityType {
diff --git a/src/ids.rs b/src/ids.rs
index 519b647..921e85d 100755
--- a/src/ids.rs
+++ b/src/ids.rs
@@ -6,7 +6,10 @@ use std::{fmt, num::ParseIntError, str::FromStr};
 pub mod consts;
 
 /// Three main types of IDs entities can have.
+///
+/// EntitySchemas (with E IDs) are currently unsupported.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[non_exhaustive]
 pub enum WikiId {
     /// A Qid, representing an entity.
     EntityId(Qid),