From ba4edac0a41ece808ae5128cd3cd6e7f8cc70083 Mon Sep 17 00:00:00 2001
From: Nick Cao <nickcao@nichi.co>
Date: Thu, 30 Apr 2026 19:06:09 -0400
Subject: [PATCH] lib.licenses: add DocBook DTD License

---
 lib/licenses/licenses.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/licenses/licenses.nix b/lib/licenses/licenses.nix
index 12301021e9c8..63fbee3cd489 100644
--- a/lib/licenses/licenses.nix
+++ b/lib/licenses/licenses.nix
@@ -522,6 +522,11 @@ lib.mapAttrs mkLicense (
       fullName = "DOC License";
     };
 
+    docBookDtd = {
+      spdxId = "DocBook-DTD";
+      fullName = "DocBook DTD License";
+    };
+
     drl10 = {
       spdxId = "DRL-1.0";
       fullName = "Detection Rule License 1.0";