diff --git a/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/__init__.py b/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/__init__.py
index 1a48057..6e2aefd 100644
--- a/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/__init__.py
+++ b/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/__init__.py
@@ -55,13 +55,13 @@ from .managed_obj_type import ManagedObjType
 ####################
 from .data_flows import (
 	FlowKind,
-	DataCapabilities,
-	DataValue,
-	DataValueArray,
-	DataValueSpectrum,
-	LazyDataValue,
-	LazyDataValueRange,
-	LazyDataValueSpectrum,
+	CapabilitiesFlow,
+	ValueFlow,
+	ArrayFlow,
+	LazyValueFlow,
+	LazyArrayRangeFlow,
+	ParamsFlow,
+	InfoFlow,
 )
 from .data_flow_actions import DataFlowAction
 
@@ -90,12 +90,12 @@ __all__ = [
 	'NODE_CAT_LABELS',
 	'ManagedObjType',
 	'FlowKind',
-	'DataCapabilities',
-	'DataValue',
-	'DataValueArray',
-	'DataValueSpectrum',
-	'LazyDataValue',
-	'LazyDataValueRange',
-	'LazyDataValueSpectrum',
+	'CapabilitiesFlow',
+	'ValueFlow',
+	'ArrayFlow',
+	'LazyValueFlow',
+	'LazyArrayRangeFlow',
+	'ParamsFlow',
+	'InfoFlow',
 	'DataFlowAction',
 ]
diff --git a/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/data_flow_actions.py b/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/data_flow_actions.py
index d59c1c8..0413c9e 100644
--- a/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/data_flow_actions.py
+++ b/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/data_flow_actions.py
@@ -17,6 +17,7 @@ class DataFlowAction(enum.StrEnum):
 	ShowPreview = 'show_preview'
 	ShowPlot = 'show_plot'
 
+	@staticmethod
 	def trigger_direction(action: typ.Self) -> typx.Literal['input', 'output']:
 		"""When a given action is triggered, all sockets/nodes/... in this direction should be recursively triggered.
 
@@ -35,6 +36,7 @@ class DataFlowAction(enum.StrEnum):
 			DataFlowAction.ShowPlot: 'input',
 		}[action]
 
+	@staticmethod
 	def stop_if_no_event_methods(action: typ.Self) -> bool:
 		return {
 			DataFlowAction.EnableLock: False,
diff --git a/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/data_flows.py b/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/data_flows.py
index 8b96029..016c60b 100644
--- a/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/data_flows.py
+++ b/src/blender_maxwell/node_trees/maxwell_sim_nodes/contracts/data_flows.py
@@ -54,7 +54,7 @@ class FlowKind(enum.StrEnum):
 	LazyArrayRange = enum.auto()
 
 	# Auxiliary
-	Param = enum.auto()
+	Params = enum.auto()
 	Info = enum.auto()
 
 	@classmethod
@@ -283,9 +283,9 @@ class LazyArrayRangeFlow:
 
 
 ####################
-# - Param
+# - Params
 ####################
-ParamFlow: typ.TypeAlias = dict[str, typ.Any]
+ParamsFlow: typ.TypeAlias = dict[str, typ.Any]
 
 
 ####################
diff --git a/src/blender_maxwell/node_trees/maxwell_sim_nodes/sockets/base.py b/src/blender_maxwell/node_trees/maxwell_sim_nodes/sockets/base.py
index af7f292..b4b6e36 100644
--- a/src/blender_maxwell/node_trees/maxwell_sim_nodes/sockets/base.py
+++ b/src/blender_maxwell/node_trees/maxwell_sim_nodes/sockets/base.py
@@ -303,56 +303,48 @@ class MaxwellSimSocket(bpy.types.NodeSocket):
 
 	# Value
 	@property
-	def value(self) -> ct.DataValue:
+	def value(self) -> ct.ValueFlow:
 		raise NotImplementedError
 
 	@value.setter
-	def value(self, value: ct.DataValue) -> None:
+	def value(self, value: ct.ValueFlow) -> None:
 		raise NotImplementedError
 
 	# ValueArray
 	@property
-	def value_array(self) -> ct.DataValueArray:
+	def array(self) -> ct.ArrayFlow:
+		## TODO: Single-element list when value exists.
 		raise NotImplementedError
 
-	@value_array.setter
-	def value_array(self, value: ct.DataValueArray) -> None:
-		raise NotImplementedError
-
-	# ValueSpectrum
-	@property
-	def value_spectrum(self) -> ct.DataValueSpectrum:
-		raise NotImplementedError
-
-	@value_spectrum.setter
-	def value_spectrum(self, value: ct.DataValueSpectrum) -> None:
+	@array.setter
+	def array(self, value: ct.ArrayFlow) -> None:
 		raise NotImplementedError
 
 	# LazyValue
 	@property
-	def lazy_value(self) -> ct.LazyDataValue:
+	def lazy_value(self) -> ct.LazyValueFlow:
 		raise NotImplementedError
 
 	@lazy_value.setter
-	def lazy_value(self, lazy_value: ct.LazyDataValue) -> None:
+	def lazy_value(self, lazy_value: ct.LazyValueFlow) -> None:
 		raise NotImplementedError
 
-	# LazyValueRange
+	# LazyArrayRange
 	@property
-	def lazy_value_range(self) -> ct.LazyDataValueRange:
+	def lazy_array_range(self) -> ct.LazyArrayRangeFlow:
 		raise NotImplementedError
 
-	@lazy_value_range.setter
-	def lazy_value_range(self, value: tuple[ct.DataValue, ct.DataValue, int]) -> None:
+	@lazy_array_range.setter
+	def lazy_array_range(self, value: tuple[ct.DataValue, ct.DataValue, int]) -> None:
 		raise NotImplementedError
 
-	# LazyValueSpectrum
+	# LazyArrayRange
 	@property
-	def lazy_value_spectrum(self) -> ct.LazyDataValueSpectrum:
+	def param(self) -> ct.ParamsFlow:
 		raise NotImplementedError
 
-	@lazy_value_spectrum.setter
-	def lazy_value_spectrum(self, value: ct.LazyDataValueSpectrum) -> None:
+	@param.setter
+	def param(self, value: tuple[ct.DataValue, ct.DataValue, int]) -> None:
 		raise NotImplementedError
 
 	####################
@@ -369,10 +361,10 @@ class MaxwellSimSocket(bpy.types.NodeSocket):
 		return {
 			ct.FlowKind.Value: lambda: self.value,
 			ct.FlowKind.ValueArray: lambda: self.value_array,
-			ct.FlowKind.ValueSpectrum: lambda: self.value_spectrum,
 			ct.FlowKind.LazyValue: lambda: self.lazy_value,
-			ct.FlowKind.LazyValueRange: lambda: self.lazy_value_range,
-			ct.FlowKind.LazyValueSpectrum: lambda: self.lazy_value_spectrum,
+			ct.FlowKind.LazyArrayRange: lambda: self.lazy_array_range,
+			ct.FlowKind.Params: lambda: self.params,
+			ct.FlowKind.Info: lambda: self.info,
 		}[kind]()
 
 		msg = f'socket._compute_data was called with invalid kind "{kind}"'
diff --git a/src/blender_maxwell/node_trees/maxwell_sim_nodes/sockets/maxwell/source.py b/src/blender_maxwell/node_trees/maxwell_sim_nodes/sockets/maxwell/source.py
index 79e68b8..5320848 100644
--- a/src/blender_maxwell/node_trees/maxwell_sim_nodes/sockets/maxwell/source.py
+++ b/src/blender_maxwell/node_trees/maxwell_sim_nodes/sockets/maxwell/source.py
@@ -18,7 +18,7 @@ class MaxwellSourceSocketDef(base.SocketDef):
 
 	def init(self, bl_socket: MaxwellSourceBLSocket) -> None:
 		if self.is_list:
-			bl_socket.active_kind = ct.FlowKind.ValueArray
+			bl_socket.active_kind = ct.FlowKind.Array
 
 
 ####################