# Namespace OptimaJet.Workflow.Core.Persistence

## Classes

-   [ApprovalHistoryItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/ApprovalHistoryItem/)
    
    Represents a pending or completed entry in the approval history maintained by [ApprovalPlugin](https://api.workflowengine.io/core/OptimaJet.Workflow.Plugins/ApprovalPlugin/).
    
-   [CommandName](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/CommandName/)
    
    Represents the system and localized names of a [CommandDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CommandDefinition/) available in [InboxItem.AvailableCommands](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/InboxItem/).
    
-   [CommandWithClassifier](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/CommandWithClassifier/)
    
    Associates a command name with the [TransitionClassifier](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/TransitionClassifier/) assigned to its command transition.
    
-   [InboxItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/InboxItem/)
    
    Represents an approval inbox entry for a process instance and a workflow participant identity.
    
-   [OutboxItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/OutboxItem/)
    
    Represents a process-specific outbox summary of [ApprovalHistoryItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/ApprovalHistoryItem/) entries recorded for a workflow participant identity.
    
-   [Paging](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/Paging/)
    
    Specifies a page of results to retrieve from persistence.
    
-   [PersistenceProviderOptions](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/PersistenceProviderOptions/)
    
    Provides configuration options for relational database persistence providers.
    
-   [ProcessInstanceItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/ProcessInstanceItem/)
    
    Represents a persisted process instance record returned by [IPersistenceProvider.GetProcessInstancesAsync(List<(string parameterName, SortDirection sortDirection)>, Paging)](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IPersistenceProvider/).
    
-   [ProcessStatus](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/ProcessStatus/)
    
    Represents the lifecycle stage of a process.
    
-   [SchemeFilePersistence](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/SchemeFilePersistence/)
    
    Stores and retrieves unparsed source schemes, Scheme Inlining relationships, and scheme tags in the file system.
    
-   [SchemeItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/SchemeItem/)
    
    Represents a persisted workflow scheme record returned by [IPersistenceProvider.GetSchemesAsync(List<(string parameterName, SortDirection sortDirection)>, Paging)](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IPersistenceProvider/).
    
-   [Sorting](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/Sorting/)
    
    Specifies the field and direction used to sort a collection of records.
    
-   [TenantGlobalParameterApi](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/TenantGlobalParameterApi/)
    
    Provides global parameter operations through an [IPersistenceProvider](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IPersistenceProvider/) for a tenant-specific or shared scope.
    
-   [TenantGlobalParameterKey](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/TenantGlobalParameterKey/)
    
    Identifies a tenant-specific or shared global parameter by its TenantGlobalParameterKey.TenantId?text=tenant+identifier, logical TenantGlobalParameterKey.Type?text=parameter+type, and TenantGlobalParameterKey.Name?text=parameter+name.
    
-   [TenantGlobalParameterScope](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/TenantGlobalParameterScope/)
    
    Specifies the TenantGlobalParameterScope.TenantId?text=tenant+identifier and logical TenantGlobalParameterScope.Type?text=global+parameter+type that define a tenant-specific or shared global parameter scope.
    
-   [WorkflowForm](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/WorkflowForm/)
    
    Represents a version of a workflow form stored by an [IFormDataProvider](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IFormDataProvider/).
    

## Interfaces

-   [IApprovalProvider](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IApprovalProvider/)
    
    Defines persistence operations for the approval inbox, approval history, and approval outbox used by [ApprovalPlugin](https://api.workflowengine.io/core/OptimaJet.Workflow.Plugins/ApprovalPlugin/).
    
-   [IFormDataProvider](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IFormDataProvider/)
    
    Defines persistence operations for retrieving, creating, versioning, updating, and deleting [WorkflowForm](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/WorkflowForm/) instances.
    
-   [IPersistenceProvider](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IPersistenceProvider/)
    
    Defines the persistence operations used by [WorkflowRuntime](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime/WorkflowRuntime/) to store and load process checkpoints, global parameters, timers, and runtime operational state.
    
-   [IProcessInstanceTreeItem](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IProcessInstanceTreeItem/)
    
    Represents the persisted data for one process instance in a [ProcessInstancesTree](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Subprocess/ProcessInstancesTree/) hierarchy.
    
-   [IRuntimePersistence](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IRuntimePersistence/)
    
    Represents the obsolete runtime persistence contract and declares no members.
    
-   [ISchemePersistenceProvider<TSchemeMedium>](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/ISchemePersistenceProvider-TSchemeMedium/)
    
    Defines asynchronous persistence operations for unparsed source schemes, stored built scheme versions, Scheme Inlining relationships, and scheme tags.
    
-   [IWorkflowProvider](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IWorkflowProvider/)
    
    Combines [IPersistenceProvider](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/IPersistenceProvider/) for runtime process data persistence, [ISchemePersistenceProvider<TSchemeMedium>](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/ISchemePersistenceProvider-TSchemeMedium/) for XML process scheme persistence, and [IWorkflowGenerator<TSchemeMedium>](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Generator/IWorkflowGenerator-TSchemeMedium/) for XML process scheme generation.
    

## Enums

-   [SortDirection](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Persistence/SortDirection/)
    
    Specifies the direction in which values are sorted.