From cb21319b2da2d3c8069243f9f4ea01a431da47a5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E3=81=BF=E3=81=A6=E3=82=8B=E3=81=9E?= <miteruzo@naver.com>
Date: Mon, 9 Mar 2026 00:46:30 +0900
Subject: [PATCH]

---
 ...%AE%9A%E7%BE%A9%E6%9B%B8%3Atag_name_sanitisation_rules.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/%E3%83%86%E3%83%BC%E3%83%96%E3%83%AB%E5%AE%9A%E7%BE%A9%E6%9B%B8%3Atag_name_sanitisation_rules.md b/%E3%83%86%E3%83%BC%E3%83%96%E3%83%AB%E5%AE%9A%E7%BE%A9%E6%9B%B8%3Atag_name_sanitisation_rules.md
index db6353d..031fe99 100644
--- a/%E3%83%86%E3%83%BC%E3%83%96%E3%83%AB%E5%AE%9A%E7%BE%A9%E6%9B%B8%3Atag_name_sanitisation_rules.md
+++ b/%E3%83%86%E3%83%BC%E3%83%96%E3%83%AB%E5%AE%9A%E7%BE%A9%E6%9B%B8%3Atag_name_sanitisation_rules.md
@@ -22,5 +22,6 @@ TagNameRule の after_update に TagName に対する置換処理を入れる．
 | 10 | `\*` | `_` | Time.current | Time.current | NULL |
 | 20 | `\?` | `_` | Time.current | Time.current | NULL |
 | 30 | `_+` | `_` | Time.current | Time.current | NULL |
-| 40 | `^_|_$` |  | Time.current | Time.current | NULL |
-| 50 | `^$` | `null` | Time.current | Time.current | NULL |
\ No newline at end of file
+| 40 | `_$` | `` | Time.current | Time.current | NULL |
+| 45 | `^(.+?\:)?_` | `\1` | Time.current | Time.current | NULL |
+| 50 | `^(.+?\:)?$` | `\1null` | Time.current | Time.current | NULL |
\ No newline at end of file