diff --git a/src/rcore/modes.rs b/src/rcore/modes.rs
index 1f44f38..773225d 100644
--- a/src/rcore/modes.rs
+++ b/src/rcore/modes.rs
@@ -264,11 +264,15 @@ pub trait FactoryModeParse<'a, Ctx: Context<'a>>: FactoryBase<'a, Ctx> + ParseMo
     ) -> ExtensionResultM<'a, Ctx, Self>;
 }
 
+/// External implementation of [`FactoryModeParse`].
 pub trait FactoryModeProxy<'a, Ctx: Context<'a>> {
+    /// Associated [`FactoryModeParse`].
     type F: FactoryBase<'a, Ctx> + ParseMode;
 
+    /// External implementation of [`FactoryModeParse::mdeserialize`].
     fn pmdeserialize<I: InCtx<'a, Ctx>>(f: &Self::F, inctx: I) -> ModeResultM<'a, Ctx, Self::F, I>;
 
+    /// External implementation of [`FactoryModeParse::mextend`].
     fn pmextend(
         f: &Self::F,
         mentionable: ExtensionSourceM<'a, Ctx, Self::F>,