diff --git a/CHANGES.rst b/CHANGES.rst
index 651b24fd..d5fc734f 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -52,6 +52,7 @@ TODOs
 * model/core: Accept units on all quantities.
 * core: Move calculations as class-methods to provide for overriding certain parts of the algorithm.
 * core: execute part of the calculation-graph based on the the data given/asked.
+.. todolist::
 
 
 Changelog
diff --git a/docs/code.rst b/docs/code.rst
index 6c791aa3..f79e835b 100644
--- a/docs/code.rst
+++ b/docs/code.rst
@@ -336,6 +336,13 @@ Schema
         type:
         - object
         - array
+      grid_wots:
+        description: |
+          A dataframe with 2-level columns (item, gear)
+          - `p_avail_stable`: reduced by safety-margin, but not by ASM
+          - `p_avail`: reduced by both SM & ASM
+          - `p_resist`: road loads power
+          - `p_req`: road loads & cycle power
       pmr:
         title: Power to Unladen-Mass
         description: Power/unladen-Mass ratio (W/kg).
diff --git a/wltp/datamodel.py b/wltp/datamodel.py
index 26740da7..b0bd3bb2 100644
--- a/wltp/datamodel.py
+++ b/wltp/datamodel.py
@@ -394,6 +394,13 @@ def _get_model_schema(additional_properties=False):
     type:
     - object
     - array
+  grid_wots:
+    description: |2
+      A dataframe with 2-level columns (item, gear)
+      - `p_avail_stable`: reduced by safety-margin, but not by ASM
+      - `p_avail`: reduced by both SM & ASM
+      - `p_resist`: road loads power
+      - `p_req`: road loads & cycle power
   pmr:
     title: Power to Unladen-Mass
     description: Power/unladen-Mass ratio (W/kg).
@@ -918,9 +925,15 @@ def yield_load_curve_errors(mdl):
 
 
 def yield_n_min_errors(mdl):
-    # TODO: accept ARRAY `n_min_drive`
     # TODO: min(Nwot) <= n_min_drive_set
-    # NOTE: cannot check `t_end_cold` is in stop-gap, wltc-class decision not made yet.
+    """
+    .. TODO:: 
+      Support ARRAY for `n_min_drive_up/dn`.
+    .. TODO:: 
+      cannot Checking of `t_end_cold` is in stop-gap during datamodel-validation; 
+      wltc-class decision not made yet.
+    
+    """
 
     d = wio.pstep_factory.get()
     # g = wio.pstep_factory.get().gears