BerriJ · BerriJ · Aug 7, 2026 · Aug 7, 2026 · Aug 7, 2026
diff --git a/misc/endpoints/Balancing/12.3.B&C Balancing energy bids.json b/misc/endpoints/Balancing/12.3.B&C Balancing energy bids.json
@@ -55,12 +55,6 @@
       "value": "A01",
       "description": "[O] A01 = Up; A02 = Down",
       "disabled": true
-    },
-    {
-      "key": "curveType",
-      "value": "A03",
-      "description": "[O] A01 = Sequential fixed block; A03 = Variable sized blocks (default)",
-      "disabled": true
     }
   ]
 }
diff --git a/misc/endpoints/Balancing/IFs 3.10, 3.16 & 3.17 Netted and Exchanged Volumes per Border.json b/misc/endpoints/Balancing/IFs 3.10, 3.16 & 3.17 Netted and Exchanged Volumes per Border.json
@@ -31,12 +31,6 @@
       "key": "periodEnd",
       "value": "202503020000",
       "description": "[M] Pattern yyyyMMddHHmm e.g. 201601010000"
-    },
-    {
-      "key": "curveType",
-      "value": "A03",
-      "description": "[O] A01 = Sequential fixed block; A03 = Variable sized blocks (default)",
-      "disabled": true
     }
   ]
 }
diff --git a/misc/endpoints/Balancing/IFs 3.10, 3.16 & 3.17 Netted and Exchanged Volumes.json b/misc/endpoints/Balancing/IFs 3.10, 3.16 & 3.17 Netted and Exchanged Volumes.json
@@ -31,12 +31,6 @@
       "key": "periodEnd",
       "value": "202301022300",
       "description": "[M] Pattern yyyyMMddHHmm e.g. 201601010000"
-    },
-    {
-      "key": "curveType",
-      "value": "A03",
-      "description": "[O] A01 = Sequential fixed block; A03 = Variable sized blocks (default)",
-      "disabled": true
     }
   ]
 }
diff --git a/misc/endpoints/Balancing/IFs aFRR 3.4 & mFRR 3.4 Elastic Demands.json b/misc/endpoints/Balancing/IFs aFRR 3.4 & mFRR 3.4 Elastic Demands.json
@@ -37,12 +37,6 @@
       "value": "0",
       "description": "[O] Integer: Zero‑based index of the first TimeSeries to return. The offset parameter paginates the response in batches of 100 TimeSeries (e.g., offset = n returns the TimeSeries in the range n+1 to n+100).",
       "disabled": true
-    },
-    {
-      "key": "curveType",
-      "value": "A03",
-      "description": "[O] A01 = Sequential fixed block; A03 = Variable sized blocks (default)",
-      "disabled": true
     }
   ]
 }
diff --git a/misc/endpoints/Balancing/IFs mFRR 9.9, aFRR 9.6&9.8 Changes to Bid Availability.json b/misc/endpoints/Balancing/IFs mFRR 9.9, aFRR 9.6&9.8 Changes to Bid Availability.json
@@ -38,12 +38,6 @@
       "value": "100",
       "description": "[O] Integer: Zero‑based index of the first TimeSeries to return. The offset parameter paginates the response in batches of 100 TimeSeries (e.g., offset = n returns the TimeSeries in the range n+1 to n+100).",
       "disabled": true
-    },
-    {
-      "key": "curveType",
-      "value": "A03",
-      "description": "[O] A01 = Sequential fixed block; A03 = Variable sized blocks (default)",
-      "disabled": true
     }
   ]
 }
diff --git a/misc/endpoints/Market/11.1.B Flow Based Allocations.json b/misc/endpoints/Market/11.1.B Flow Based Allocations.json
@@ -31,12 +31,6 @@
       "key": "periodEnd",
       "value": "201402040500",
       "description": "[M] Pattern yyyyMMddHHmm e.g. 201601010000"
-    },
-    {
-      "key": "curveType",
-      "value": "A03",
-      "description": "[O] A01 = Sequential fixed block; A03 = Variable sized blocks (default)",
-      "disabled": true
     }
   ]
 }
diff --git a/misc/endpoints/OMI/Other Market Information.json b/misc/endpoints/OMI/Other Market Information.json
@@ -51,12 +51,6 @@
       "value": "NDE5ODBiYjFkM2ExMTljYTM5Mzk2ODcxNDFkZDE4MzU=",
       "description": "[O] If mRID is included, individual versions of the particular event are queried using the rest of the parameters",
       "disabled": true
-    },
-    {
-      "key": "curveType",
-      "value": "A03",
-      "description": "[O] A01 = Sequential fixed block; A03 = Variable sized blocks (default)",
-      "disabled": true
     }
   ]
 }
diff --git a/misc/endpoints/Outages/Fall-backs [IFs IN 7.2, mFRR 3.11, aFRR 3.10].json b/misc/endpoints/Outages/Fall-backs [IFs IN 7.2, mFRR 3.11, aFRR 3.10].json
@@ -49,12 +49,6 @@
       "value": "0",
       "description": "[O] Integer: Zero‑based index of the first XML document to return. The offset parameter paginates the response in batches of 100 XML documents (e.g., offset = n returns the XMLs in the range n+1 to n+100).",
       "disabled": true
-    },
-    {
-      "key": "curveType",
-      "value": "A03",
-      "description": "[O] A01 = Sequential fixed block; A03 = Variable sized blocks (default)",
-      "disabled": true
     }
   ]
 }
diff --git a/src/entsoe/Balancing/specific_params.py b/src/entsoe/Balancing/specific_params.py
@@ -316,7 +316,6 @@ def __init__(
         direction: Optional[str] = None,
         # Additional common parameters
         offset: int = 0,
-        curve_type: str = "A01",
     ):
         """
         Initialize balancing energy bids parameters.
@@ -331,8 +330,6 @@ def __init__(
             original_market_product: A02=Specific, A03=Integrated Process, A04=Local
             direction: A01=Up, A02=Down
             offset: Offset for pagination
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
         """
         # Initialize with preset and user parameters
         super().__init__(
@@ -346,7 +343,6 @@ def __init__(
             original_market_product=original_market_product,
             direction=direction,
             offset=offset,
-            curve_type=curve_type,
         )
 
 
@@ -1088,8 +1084,6 @@ def __init__(
         acquiring_domain: str,
         connecting_domain: str,
         process_type: str,
-        # Additional common parameters
-        curve_type: str = "A01",
     ):
         """
         Initialize netted and exchanged volumes parameters.
@@ -1110,7 +1104,6 @@ def __init__(
             acquiring_domain=acquiring_domain,
             connecting_domain=connecting_domain,
             process_type=process_type,
-            curve_type=curve_type,
         )
 
 
@@ -1138,8 +1131,6 @@ def __init__(
         acquiring_domain: str,
         connecting_domain: str,
         process_type: str,
-        # Additional common parameters
-        curve_type: str = "A01",
     ):
         """
         Initialize netted and exchanged volumes per border parameters.
@@ -1160,7 +1151,6 @@ def __init__(
             acquiring_domain=acquiring_domain,
             connecting_domain=connecting_domain,
             process_type=process_type,
-            curve_type=curve_type,
         )
 
 
@@ -1190,7 +1180,6 @@ def __init__(
         process_type: str,
         # Additional common parameters
         offset: int = 0,
-        curve_type: str = "A01",
     ):
         """
         Initialize elastic demands parameters.
@@ -1201,8 +1190,6 @@ def __init__(
             acquiring_domain: EIC code of a Scheduling Area
             process_type: A51=aFRR, A47=mFRR
             offset: Offset for pagination
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
         """
         # Initialize with preset and user parameters
         super().__init__(
@@ -1213,7 +1200,6 @@ def __init__(
             business_type="B75",
             process_type=process_type,
             offset=offset,
-            curve_type=curve_type,
         )
 
 
@@ -1246,7 +1232,6 @@ def __init__(
         business_type: Optional[str] = None,
         # Additional common parameters
         offset: int = 0,
-        curve_type: str = "A01",
     ):
         """
         Initialize changes to bid availability parameters.
@@ -1259,8 +1244,6 @@ def __init__(
                           C43=Voltage limit, C44=Current limit, C45=Short-circuit limit,
                           C46=Dynamic stability limit
             offset: Offset for pagination
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
         """
         # Initialize with preset and user parameters
         super().__init__(
@@ -1271,7 +1254,6 @@ def __init__(
             process_type="A47",
             business_type=business_type,
             offset=offset,
-            curve_type=curve_type,
         )
 
 

diff --git a/src/entsoe/Base/Balancing.py b/src/entsoe/Base/Balancing.py
@@ -31,7 +31,7 @@ def __init__(
         registered_resource: Optional[str] = None,
         # Additional common parameters
         offset: int | None = None,
-        curve_type: str = "A01",
+        curve_type: Optional[str] = None,
     ):
         """
         Initialize balancing data parameters for ENTSO-E Transparency Platform.
@@ -62,8 +62,7 @@ def __init__(
             direction: Direction (A01=Up, A02=Down)
             registered_resource: EIC code of registered resource/transmission asset
             offset: Offset for pagination
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
+            curve_type: Curve type (default None, can be set to "A01" or "A03" for specific queries)
 
         Raises:
             ValidationError: If any input parameter is invalid

diff --git a/src/entsoe/Base/Base.py b/src/entsoe/Base/Base.py
@@ -29,8 +29,8 @@ def __init__(
         document_type: str,
         period_start: Optional[int] = None,
         period_end: Optional[int] = None,
-        offset: int | None = None,
-        curve_type: str = "A01",
+        offset: Optional[int] = None,
+        curve_type: Optional[str] = None,
     ):
         """
         Initialize base parameters for ENTSO-E Transparency Platform queries.
@@ -40,8 +40,7 @@ def __init__(
             period_start: Start period (YYYYMMDDHHMM format, optional)
             period_end: End period (YYYYMMDDHHMM format, optional)
             offset: Offset for pagination
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
+            curve_type: Curve type (default None, can be set to "A01" or "A03" for specific queries)
 
         Raises:
             ValidationError: If any input parameter is invalid
@@ -52,7 +51,6 @@ def __init__(
         # Initialize the base parameters dictionary
         self.params: Dict[str, Any] = {
             "documentType": document_type,
-            "curveType": curve_type,
         }
 
         # Add period parameters using the proper method
@@ -61,6 +59,9 @@ def __init__(
         if offset is not None:
             self.add_optional_param("offset", offset)
 
+        if curve_type is not None:
+            self.add_optional_param("curveType", curve_type)
+
     def validate_eic_code(
         self,
         eic_code: Optional[str],

diff --git a/src/entsoe/Base/Market.py b/src/entsoe/Base/Market.py
@@ -26,7 +26,7 @@ def __init__(
         ] = None,
         # Additional common parameters
         offset: int | None = None,
-        curve_type: str = "A01",
+        curve_type: Optional[str] = None,
     ):
         """
         Initialize market data parameters for ENTSO-E Transparency Platform.
@@ -48,8 +48,7 @@ def __init__(
             classification_sequence_attribute_instance_component_position: Position
                 for classification
             offset: Offset for pagination
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
+            curve_type: Curve type (default None, can be set to "A01" or "A03" for specific queries)
 
         Raises:
             ValidationError: If any input parameter is invalid

diff --git a/src/entsoe/Market/specific_params.py b/src/entsoe/Market/specific_params.py
@@ -389,8 +389,6 @@ def __init__(
         in_domain: str,
         out_domain: str,
         process_type: str,
-        # Additional common parameters
-        curve_type: str = "A01",
     ):
         """
         Initialize flow based allocations parameters.
@@ -402,8 +400,6 @@ def __init__(
             out_domain: EIC code of a Region
             process_type: Process type (A43=Day ahead, A44=Intraday,
                 A32=Month-ahead, A33=Year-ahead)
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
         """
         # Initialize with preset and user parameters
         super().__init__(
@@ -413,7 +409,6 @@ def __init__(
             period_end=period_end,
             in_domain=in_domain,
             out_domain=out_domain,
-            curve_type=curve_type,
         )
 
         # Validate that in_domain and out_domain are the same

diff --git a/src/entsoe/OMI/OMI.py b/src/entsoe/OMI/OMI.py
@@ -23,7 +23,6 @@ def __init__(
         m_rid: Optional[str] = None,
         # Additional common parameters
         offset: int = 0,
-        curve_type: str = "A01",
     ):
         """
         Initialize Other Market Information parameters for ENTSO-E Transparency
@@ -44,8 +43,6 @@ def __init__(
                   event are queried using rest of parameters
             offset: Offset for pagination (allows downloading more than 200 docs,
                    offset ∈ [0,4800] so paging restricted to 5000 docs max)
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
 
         Raises:
             ValueError: If doc_status is not one of A05, A09, A13
@@ -90,7 +87,6 @@ def __init__(
             period_start=period_start,
             period_end=period_end,
             offset=0,  # Don't pass offset to base, we'll handle it with correct name
-            curve_type=curve_type,
         )
 
         # Add OMI-specific parameters using exact JSON parameter names

diff --git a/src/entsoe/OMI/specific_params.py b/src/entsoe/OMI/specific_params.py
@@ -40,7 +40,6 @@ def __init__(
         m_rid: Optional[str] = None,
         # Additional common parameters
         offset: int = 0,
-        curve_type: str = "A01",
     ):
         """
         Initialize other market information parameters.
@@ -58,8 +57,6 @@ def __init__(
                              mandatory if period_start and period_end not defined)
             m_rid: Message ID for specific information versions
             offset: Offset for pagination
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
 
         Note:
             Either (period_start, period_end) or
@@ -75,7 +72,6 @@ def __init__(
             doc_status=doc_status,
             m_rid=m_rid,
             offset=offset,
-            curve_type=curve_type,
         )
 
         # Set the fixed document type for Other Market Information

diff --git a/src/entsoe/Outages/specific_params.py b/src/entsoe/Outages/specific_params.py
@@ -386,8 +386,6 @@ def __init__(
         # Optional filtering parameters
         doc_status: Optional[str] = None,
         m_rid: Optional[str] = None,
-        # Additional common parameters
-        curve_type: str = "A01",
     ):
         """
         Initialize fall-backs parameters.
@@ -409,8 +407,6 @@ def __init__(
             doc_status: Document status (A13=Withdrawn, by default withdrawn
                        publications not returned)
             m_rid: Message ID for specific publication versions
-            curve_type: Curve type (default "A01" = Sequential fixed block;
-                       "A03" = Variable sized blocks)
         """
         super().__init__(
             document_type="A53",
@@ -422,7 +418,6 @@ def __init__(
             business_type=business_type,
             doc_status=doc_status,
             m_rid=m_rid,
-            curve_type=curve_type,
         )
 
         # Add process type parameter specific to this endpoint