diff --git a/src/rcore/modes.rs b/src/rcore/modes.rs
index 980d607..9d08573 100644
--- a/src/rcore/modes.rs
+++ b/src/rcore/modes.rs
@@ -375,10 +375,13 @@ pub trait CRegularFactory<'a, Ctx: Context<'a>>:
     fn crextend(&self, mentionable: Self::Mtbl, tail: &[u8]) -> ParseResult<'a, Ctx, Self>;
 }
 
+/// Mostly same as [`FactoryModeParse`] but requires [`Mode`] to be [`RegularMode`].
 pub trait RegularFactory<'a, Ctx: Context<'a>>:
     FactoryBase<'a, Ctx> + ParseMode<Mode = RegularMode>
 {
+    /// Same as [`FactoryModeParse::mdeserialize`].
     fn rdeserialize(&self, inctx: impl InCtx<'a, Ctx>) -> ParseResult<'a, Ctx, Self>;
+    /// Same as [`FactoryModeParse::mextend`].
     fn rextend(&self, mentionable: Self::Mtbl, tail: &[u8]) -> ParseResult<'a, Ctx, Self>;
 }