diff --git a/windIO/plant/wind_energy_system.yaml b/windIO/plant/wind_energy_system.yaml
index 2708baf..0dc2d3c 100644
--- a/windIO/plant/wind_energy_system.yaml
+++ b/windIO/plant/wind_energy_system.yaml
@@ -26,6 +26,148 @@ properties:
     description: Specific attributes of the entire wind energy system
     type: object
     properties:
+
+      #~~
+      flow_model:
+        title: Flow model
+        description: Flow model used in wind farm design
+        type: object
+        additionalProperties: true
+        properties:
+          name:
+            title: Flow model name
+            type: string
+            enum: ["foxes", "pyWake", "pyWakeEllipSys", "codeSaturne", "wayve", "floris"]
+      analyses:
+        wind_deficit_model:
+          title: Wind deficit model
+          description: Wake wind deficit model used in AEP calculations
+          type: object
+          additionalProperties: true # to be set to False in a future release
+          properties:
+            name:
+              title: Wake model name
+              type: string
+              enum: ["Jensen", "Bastankhah2014", "Bastankhah2016", "TurbOPark"]
+            wake_expansion_coefficient:
+              title: wake expansion coefficient
+              type: object
+              properties:
+                 k_a:
+                    title: Wake expansion coefficient
+                    type: float # (default 0.04)
+                 k_b:
+                    title: Factor to multiply TI
+                    type: float # (default 0)
+                 free_stream_ti:
+                    title: Flag deciding to use freestream or waked TI
+                    type: bool # (default to False)
+            ceps:
+              title: Bastankhah c_epsilon factor
+              type: float
+            use_effective_ws:
+              title: flag to use freestream wind speed for deficit computation
+              type: bool
+            
+        axial_induction_model:
+            title: axial induction model
+            type: string
+            enum: ["1D", "Madsen"]
+
+        deflection_model:
+          title: Deflection model
+          description: defines the deviation of the path of the wake centerline in the crossflow direction (only for wake steering)
+          #description: Deflection model used in AEP calculations
+          type: object
+          additionalProperties: true
+          properties:
+            name:
+              title: Deflection model name
+              type: string
+              enum: ["None", "Jimenez", "Batankhah2016"]
+            beta:
+              title: Jimenez deflection coefficient
+              type: float
+              # (Batankhah2016 only works with Batankhah2016 wind deficit)
+            
+        turbulence_model:
+          title: Turbulence model
+          description: Turbulence model used in AEP calculations
+          type: object
+          additionalProperties: true
+          properties:
+            name:
+              title: Turbulence model name
+              type: string
+              enum: ["STF2005", "STF2017", "IEC-TI-2019", "CrespoHernandez", "GCL"]
+              # Q: IEC versus Franson
+              # note: We assume same shape as wind deficit for now
+            coefficents:
+              title: coefficients 
+              type: array
+            
+        superposition_model:
+          title: Superposition model
+          description: Superposition model used in AEP calculations
+          type: object
+          additionalProperties: true
+          properties:
+            ws_superposition:
+              title: Speed superposition model name
+              type: string
+              enum: ["Linear", "Squared", "Max", "Product"]
+            ti_superposition:
+              title: TI superposition model name
+              type: string
+              enum: ["Linear", "Squared", "Max", "Product"]
+
+        rotor_averaging:
+          title: Rotor average
+          description: Rotor averaging model used in AEP calculations
+          type: object
+          additionalProperties: true
+          properties:
+            grid:
+              title: Grid type
+              type: string
+            n_x_grid_points:
+              title: Number of x grid points
+              type: integer
+            n_y_grid_points:
+              title: Number of y grid points
+              type: integer
+            background_averaging: # (velocity and TI)
+              title: Averaging model for background velocity and TI
+              type: string
+              enum: ["center", "grid"]
+            wake averaging: # velocity and TI averaging
+              title: Averaging model for wake velocity and TI
+              type: string
+              enum: ["center", 'grid'] # Assume the grid is not used for tophat model because analytic solution is available
+            wind_speed_exponent_for_power:
+              type: int
+            wind_speed_exponent_for_ct:
+              type: int  
+
+
+        blockage_model:
+          title: Blockage model
+          description: Blockage averaging model used in AEP calculations
+          type: object
+          additionalProperties: true
+          properties:
+            name:
+              title: Blockage model name
+              type: string
+              enum: ['None', 'RankineHalfBody', 'Rathmann', 'SelfSimilarityDeficit', 'SelfSimilarityDeficit2020']
+            parameters:
+              title: Blockage Model Parameters
+              type: array
+            #ss_alpha:
+            #  title: ss_alpha factor for SelfSimilarityDeficit2020
+            #  type: float
+
+
       #~~
       net_AEP:
         title: Net AEP for the plant/site