diff --git a/src/ast.rs b/src/ast.rs
index c68555e9..0a69dd17 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -60,7 +60,7 @@ impl FnAccess {
 /// _(INTERNALS)_ A type containing information on a scripted function.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Clone)]
@@ -273,8 +273,10 @@ impl AST {
     pub(crate) fn shared_lib(&self) -> Shared<Module> {
         self.functions.clone()
     }
-    /// Get the internal shared [`Module`] containing all script-defined functions.
+    /// _(INTERNALS)_ Get the internal shared [`Module`] containing all script-defined functions.
+    /// Exported under the `internals` feature only.
     #[cfg(feature = "internals")]
+    #[deprecated = "this method is volatile and may change"]
     #[cfg(not(feature = "no_module"))]
     #[cfg(not(feature = "no_function"))]
     #[inline(always)]
@@ -764,7 +766,7 @@ impl AsRef<Module> for AST {
 /// _(INTERNALS)_ An identifier containing an [immutable string][ImmutableString] name and a [position][Position].
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Clone, Eq, PartialEq, Hash)]
@@ -785,7 +787,7 @@ impl fmt::Debug for Ident {
 /// _(INTERNALS)_ A type encapsulating the mode of a `return`/`throw` statement.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Eq, PartialEq, Clone, Copy, Hash)]
@@ -799,7 +801,7 @@ pub enum ReturnType {
 /// _(INTERNALS)_ An [`AST`] node, consisting of either an [`Expr`] or a [`Stmt`].
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Clone, Hash)]
@@ -823,7 +825,7 @@ impl<'a> From<&'a Expr> for ASTNode<'a> {
 /// _(INTERNALS)_ A statement.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Clone, Hash)]
@@ -1070,7 +1072,7 @@ impl Stmt {
 /// _(INTERNALS)_ A custom syntax expression.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Clone, Hash)]
@@ -1086,7 +1088,7 @@ pub struct CustomExpr {
 /// _(INTERNALS)_ A binary expression.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Clone, Hash)]
@@ -1100,7 +1102,7 @@ pub struct BinaryExpr {
 /// _(INTERNALS)_ A function call.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Clone, Default, Hash)]
@@ -1195,7 +1197,7 @@ impl FloatWrapper {
 /// _(INTERNALS)_ An expression sub-tree.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Clone, Hash)]
diff --git a/src/engine.rs b/src/engine.rs
index 77f0b8aa..c6dce576 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -45,7 +45,7 @@ pub const TYPICAL_MAP_SIZE: usize = 8; // Small maps are typical
 /// _(INTERNALS)_ A stack of imported [modules][Module].
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 //
@@ -498,7 +498,7 @@ impl<T: Into<Dynamic>> From<T> for Target<'_> {
 /// _(INTERNALS)_ A type that holds all the current states of the [`Engine`].
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Clone, Default)]
@@ -538,7 +538,7 @@ impl State {
 /// _(INTERNALS)_ A type containing all the limits imposed by the [`Engine`].
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[cfg(not(feature = "unchecked"))]
diff --git a/src/module/mod.rs b/src/module/mod.rs
index 0d9046fe..c145e217 100644
--- a/src/module/mod.rs
+++ b/src/module/mod.rs
@@ -2004,7 +2004,7 @@ impl Module {
 /// A [`StaticVec`] is used because most namespace-qualified access contains only one level,
 /// and it is wasteful to always allocate a [`Vec`] with one element.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Clone, Eq, PartialEq, Default, Hash)]
diff --git a/src/parse_error.rs b/src/parse_error.rs
index e42c851a..a965af0b 100644
--- a/src/parse_error.rs
+++ b/src/parse_error.rs
@@ -11,7 +11,7 @@ use crate::{EvalAltResult, Position};
 /// _(INTERNALS)_ Error encountered when tokenizing the script text.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Eq, PartialEq, Clone, Hash)]
diff --git a/src/token.rs b/src/token.rs
index 93eee9a2..89da190c 100644
--- a/src/token.rs
+++ b/src/token.rs
@@ -150,7 +150,7 @@ impl fmt::Debug for Position {
 /// _(INTERNALS)_ A Rhai language token.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, PartialEq, Clone)]
@@ -742,7 +742,7 @@ impl From<Token> for String {
 /// _(INTERNALS)_ State of the tokenizer.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This type is volatile and may change.
 #[derive(Debug, Clone, Eq, PartialEq, Default)]
@@ -764,7 +764,7 @@ pub struct TokenizeState {
 /// _(INTERNALS)_ Trait that encapsulates a peekable character input stream.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile Data Structure
 ///
 /// This trait is volatile and may change.
 pub trait InputStream {
@@ -781,9 +781,9 @@ pub trait InputStream {
 /// _(INTERNALS)_ Parse a string literal wrapped by `enclosing_char`.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile API
 ///
-/// This type is volatile and may change.
+/// This function is volatile and may change.
 pub fn parse_string_literal(
     stream: &mut impl InputStream,
     state: &mut TokenizeState,
@@ -976,9 +976,9 @@ fn scan_block_comment(
 /// _(INTERNALS)_ Get the next token from the `stream`.
 /// Exported under the `internals` feature only.
 ///
-/// # WARNING
+/// # Volatile API
 ///
-/// This type is volatile and may change.
+/// This function is volatile and may change.
 #[inline]
 pub fn get_next_token(
     stream: &mut impl InputStream,