# Class DefaultDefinitions

OptimaJet.Workflow.Core.Model.DefaultDefinitions

Provides the built-in [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) instances whose [ParameterDefinition.Purpose](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) is [ParameterPurpose.System](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterPurpose/), together with the predefined [CommandDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CommandDefinition/) instances.

Namespace: [OptimaJet.Workflow.Core.Model](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/)

```csharp
public static class DefaultDefinitions
```

## Methods

`public static bool IsSystemParameter(string name)` 

Determines whether `name` matches the name of a definition in [DefaultDefinitions.DefaultParameters](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DefaultDefinitions/).

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The parameter name to compare using [StringComparison.Ordinal](https://learn.microsoft.com/dotnet/api/system.stringcomparison#system-stringcomparison-ordinal). |

### Returns

| Type | Description |
| --- | --- |
| `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) if `name` matches a definition in [DefaultDefinitions.DefaultParameters](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DefaultDefinitions/); otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |

## Fields

`public static readonly ParameterDefinition ParameterProcessId` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the process instance identifier in [ProcessInstance.ProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterParentProcessId` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the immediate parent process identifier in [ProcessInstance.ParentProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) for a subprocess.

`public static readonly ParameterDefinition ParameterRootProcessId` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the root process identifier in [ProcessInstance.RootProcessId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) for a process hierarchy.

`public static readonly ParameterDefinition ParameterPreviousState` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.PreviousState](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which records the [ActivityDefinition.State](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ActivityDefinition/) of [TransitionDefinition.From](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TransitionDefinition/) for the most recently executed transition whose source business state is not empty.

`public static readonly ParameterDefinition ParameterCurrentState` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the current business state in [ProcessInstance.CurrentState](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterPreviousStateForDirect` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.PreviousStateForDirect](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which records the [ActivityDefinition.State](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ActivityDefinition/) of [TransitionDefinition.From](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TransitionDefinition/) for the most recently executed [TransitionClassifier.Direct](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TransitionClassifier/) transition whose source business state is not empty.

`public static readonly ParameterDefinition ParameterPreviousStateForReverse` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.PreviousStateForReverse](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which records the [ActivityDefinition.State](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ActivityDefinition/) of [TransitionDefinition.From](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TransitionDefinition/) for the most recently executed [TransitionClassifier.Reverse](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TransitionClassifier/) transition whose source business state is not empty.

`public static readonly ParameterDefinition ParameterPreviousActivity` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.PreviousActivityName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which records the source activity name for the most recently executed transition.

`public static readonly ParameterDefinition ParameterCurrentActivity` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the current activity name in [ProcessInstance.CurrentActivityName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterPreviousActivityForDirect` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.PreviousActivityForDirectName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which records the source activity name for the most recently executed [TransitionClassifier.Direct](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TransitionClassifier/) transition.

`public static readonly ParameterDefinition ParameterPreviousActivityForReverse` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.PreviousActivityForReverseName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which records the source activity name for the most recently executed [TransitionClassifier.Reverse](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TransitionClassifier/) transition.

`public static readonly ParameterDefinition ParameterCurrentCommand` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the applicable command name in [ProcessInstance.CurrentCommand](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) for the current execution.

`public static readonly ParameterDefinition ParameterExecutedTimer` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.ExecutedTimer](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which stores the name of the [TimerDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TimerDefinition/) that initiated transition execution.

`public static readonly ParameterDefinition ParameterExecutedActivityState` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.ExecutedActivityState](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which stores the [ActivityDefinition.State](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ActivityDefinition/) of the activity selected for execution, or [ProcessInstance.CurrentState](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) when the selected activity has no business state.

`public static readonly ParameterDefinition ParameterExecutedActivity` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the [ActivityDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ActivityDefinition/) selected for execution in [ProcessInstance.ExecutedActivity](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterExecutedTransition` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the [TransitionDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TransitionDefinition/) being executed in [ProcessInstance.ExecutedTransition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterIdentityId` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.IdentityId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which stores the workflow participant identity of the executor that executes a command or sets a business state.

`public static readonly ParameterDefinition ParameterImpersonatedIdentityId` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.ImpersonatedIdentityId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which stores the workflow participant identity on whose behalf a command is executed or a business state is set.

`public static readonly ParameterDefinition ParameterSchemeId` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the identifier of the process scheme version in [ProcessInstance.SchemeId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterSchemeCode` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the process scheme code in [ProcessInstance.SchemeCode](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterIsPreExecution` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.IsPreExecution](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which indicates whether the process is being evaluated in pre-execution simulation.

`public static readonly ParameterDefinition ParameterStartTransitionalProcessActivity` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.StartTransitionalProcessActivity](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which stores the name of the activity from which transitional execution started.

`public static readonly ParameterDefinition ParameterTenantId` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the optional tenant identifier assigned to the process instance in [ProcessInstance.TenantId](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterSubprocessName` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the name assigned to a subprocess in [ProcessInstance.SubprocessName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterCreationDate` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the process creation time in [ProcessInstance.CreationDate](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterLastTransitionDate` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the time of the most recent transition execution in [ProcessInstance.LastTransitionDate](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterStartTransitionTime` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the start time of the current transition execution in [ProcessInstance.StartTransitionTime](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterCalendarName` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the process-level work calendar name in [ProcessInstance.CalendarName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/).

`public static readonly ParameterDefinition ParameterIdentityIds` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.IdentityIds](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which stores the workflow participant identities that can execute a transition leading to the activity evaluated in pre-execution simulation.

`public static readonly ParameterDefinition ParameterIdentityIdsForCurrentActivity` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) for [ProcessInstance.IdentityIdsForCurrentActivity](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/), which stores the workflow participant identities that can execute a transition from the current activity during pre-execution simulation.

`public static readonly ParameterDefinition ParameterProcessActivityChangedSent` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that records whether notification dispatch through [WorkflowRuntime.OnProcessActivityChanged](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime/WorkflowRuntime/) and [WorkflowRuntime.OnProcessActivityChangedAsync](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime/WorkflowRuntime/) has completed during the current execution sequence when [WorkflowRuntimeSettings.DisableMultipleProcessActivityChanged](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime/WorkflowRuntimeSettings/) is enabled.

`public static readonly ParameterDefinition ParameterPreviousProcessInstance` 

The [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) that stores the [ProcessInstance](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) snapshot used when raising [WorkflowRuntime.OnProcessActivityChanged](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime/WorkflowRuntime/) and [WorkflowRuntime.OnProcessActivityChangedAsync](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime/WorkflowRuntime/) while [WorkflowRuntimeSettings.DisableMultipleProcessActivityChanged](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime/WorkflowRuntimeSettings/) is enabled.

`public static CommandDefinition CommandAuto` 

The predefined [CommandDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CommandDefinition/) named `Auto`.

`public static CommandDefinition CommandSetState` 

The predefined [CommandDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CommandDefinition/) assigned to [ProcessInstance.CurrentCommand](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) when a business state is set without a command name.

`public static CommandDefinition CommandTimer` 

The predefined [CommandDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CommandDefinition/) assigned to [ProcessInstance.CurrentCommand](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ProcessInstance/) during timer transition execution.

`public static readonly IEnumerable<ParameterDefinition> DefaultParameters` 

The collection of [ParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterDefinition/) instances added to parsed process schemes as [ParameterPurpose.System](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterPurpose/) parameters and recognized by [DefaultDefinitions.IsSystemParameter(string)](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DefaultDefinitions/).

[Previous ConditionType](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ConditionType/) [Next DesignerSettings](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DesignerSettings/)