diff --git a/.Jules/palette.md b/.Jules/palette.md
index 32fb11be..9d6c4f20 100644
--- a/.Jules/palette.md
+++ b/.Jules/palette.md
@@ -43,3 +43,6 @@
 ## 2024-06-26 - [Abbreviation Comprehension in ERD Nodes]
 **Learning:** Users without deep database administration backgrounds may not immediately recognize domain-specific abbreviations like "PK" or "FK" rendered as minimalist badges inside dense ERD nodes.
 **Action:** Always provide `title` attributes on technical acronym badges (like Primary Key / Foreign Key) to ensure clarity and improve accessibility without cluttering the space-constrained node UI.
+## 2026-07-06 - Semantic Tags for Technical Badges
+**Learning:** In accessibility optimization tasks, injecting unsanitized data (e.g. `col.column_name`) directly into DOM attributes (like `aria-label`) within sensitive editing components (like `EditTableModal.tsx`) can inadvertently trigger XSS security scanners and CI blockades in strict environments like STRIX. Additionally, non-semantic elements like `<span>` can have their `aria-label` dropped by assistive technologies.
+**Action:** When working on isolated UX fixes in highly secured repos, avoid touching data-binding inside sensitive inputs. Instead, focus on purely semantic upgrades in isolated display components (e.g., swapping `<span>` for `<abbr>` in `TableNode.tsx`) to ensure accessibility attributes are reliably announced without crossing trust boundaries.
diff --git a/frontend/src/erd/TableNode.tsx b/frontend/src/erd/TableNode.tsx
index f80d8488..6d189ac6 100644
--- a/frontend/src/erd/TableNode.tsx
+++ b/frontend/src/erd/TableNode.tsx
@@ -158,9 +158,9 @@ function TableNode(props: NodeProps<TableNodeNode>) {
                 </abbr>
               ) : null}
               {c.is_not_null ? (
-                <span className="tableNode__badge" title="Not Null" aria-label="필수 입력 (Not Null)">
+                <abbr className="tableNode__badge" title="Not Null" aria-label="필수 입력 (Not Null)">
                   NOT NULL
-                </span>
+                </abbr>
               ) : null}
               <Handle
                 type="source"