diff --git a/lib/common/character/mod.dart b/lib/common/character/mod.dart
index 4ff5947..e9c9cc2 100644
--- a/lib/common/character/mod.dart
+++ b/lib/common/character/mod.dart
@@ -111,7 +111,7 @@ class Primary extends Character {
     final width = right - left;
     return (
       '''
-        <use href="#${specification.abbr}" x="$baseX" y="${height / 2}" fill="$fillColor" />
+        <use href="#${specification.name}" x="$baseX" y="${height / 2}" fill="$fillColor" />
       ''',
       width,
     );
diff --git a/lib/common/character/primary/specification.dart b/lib/common/character/primary/specification.dart
index 8de8eff..867acf9 100644
--- a/lib/common/character/primary/specification.dart
+++ b/lib/common/character/primary/specification.dart
@@ -1,29 +1,44 @@
+import 'package:enthrirch/common/utils.dart';
+
 enum Specification {
-  basic(
+  /// Basic Specification
+  bsc(
     path: "M 7.50 -35.00 L 0.00 -27.50 57.50 35.00 65.00 27.50 7.50 -35.00 Z",
-    abbr: "BSC",
+    bAnchor: Coord(0, -27.50),
+    dAnchor: Coord(65.00, 27.50),
   ),
-  contential(
+
+  /// Contential Specification
+  cte(
     path:
         "M 32.50 5.00 L 40.00 -2.50 7.50 -35.00 0.00 -27.50 32.50 5.00 M 15.00 -5.00 L 7.50 2.50 40.00 35.00 47.50 27.50 15.00 -5.00 Z",
-    abbr: "CTE",
+    bAnchor: Coord(0, -27.50),
+    dAnchor: Coord(47.50, 27.50),
   ),
-  constitutive(
+
+  /// Constitutive Specification
+  csv(
     path:
         "M 28.00 8.10 L 35.45 0.60 62.50 35.00 70.00 27.50 42.20 -8.50 34.45 -0.70 7.50 -35.00 0.00 -27.50 28.00 8.10 Z",
-    abbr: "CSV",
+    bAnchor: Coord(0, -27.50),
+    dAnchor: Coord(70.00, 27.50),
   ),
-  objective(
+
+  /// Objective Specification
+  obj(
     path:
         "M 47.50 35.00 L 55.00 27.50 28.10 0.60 35.55 -6.95 7.50 -35.00 0.00 -27.50 26.90 -0.60 19.40 6.90 47.50 35.00 Z",
-    abbr: "OBJ",
+    bAnchor: Coord(0, -27.50),
+    dAnchor: Coord(55.00, 27.50),
   );
 
   final String path;
-  final String abbr;
+  final Coord bAnchor;
+  final Coord dAnchor;
 
   const Specification({
     required this.path,
-    required this.abbr,
+    required this.bAnchor,
+    required this.dAnchor,
   });
 }
diff --git a/lib/common/ithkuil_svg.dart b/lib/common/ithkuil_svg.dart
index c00a899..1919fa7 100644
--- a/lib/common/ithkuil_svg.dart
+++ b/lib/common/ithkuil_svg.dart
@@ -69,7 +69,7 @@ class IthkuilSvg extends StatelessWidget {
       '''<svg width="$baseWidth" height="$baseHeight">
         <defs>
           ${usedSpecifications.map(
-            (e) => '<path stroke="none" id="${e.abbr}" d="${e.path}" />',
+            (e) => '<path stroke="none" id="${e.name}" d="${e.path}" />',
           ).join('')}
           ${usedCores.map(
             (e) =>
diff --git a/lib/pages/construct.dart b/lib/pages/construct.dart
index f9ffa91..850fb76 100644
--- a/lib/pages/construct.dart
+++ b/lib/pages/construct.dart
@@ -21,7 +21,7 @@ class _ConstructPageState extends State<ConstructPage> {
         IthkuilSvg(
           [
             const Primary(
-              specification: Specification.constitutive,
+              specification: Specification.obj,
             ),
             Secondary.from("zvw")!,
             Secondary.from("zxr")!,