Update README.md

README.md

@@ -70,7 +70,8 @@ graph TD
     C --> D(Hexel: Atomic Spatial Primitive)
     D --> E(Coxel: Simultaneously Evolving Hexel Clusters)
     E --> F(Xyxel: Coxel Configuration and Planar Layout)
-    F --> G(Zaxel: Xyxel Stacking and Volumetric Massing)
+    F --> N(Nexel: Spatial Nesting and Sub-configurations)
+    N --> G(Zaxel: Xyxel Stacking and Volumetric Massing)
     
     F --> F1[SVG Rendering]
     G --> G1[WebGPU Massing]
@@ -103,7 +104,9 @@ Every spatial layout committed to this dataset is resolved using a zero-dependen
     *   *Role*: Groups discrete hexels into simultaneously expanding clusters to represent coherent programmatic zones, nodes, or functional areas.
 4.  **Xyxel (Planar Subdivision)**:
     *   *Role*: Subdivides, proportions, and fits the growing coxel boundaries within irregularity constraints to resolve a finalized 2D planar floor layout.
-5.  **Zaxel (Volumetric Stacking)**:
+5.  **Nexel (Spatial Nesting)**:
+    *   *Role*: Resolves spatial nesting and sub-configurations within parent spatial blocks.
+6.  **Zaxel (Volumetric Stacking)**:
     *   *Role*: Stacks planar layout matrices vertically to distribute programmatic nodes across multiple levels, resolving vertical circulation and massing constraints.
 
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