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Service Interfaces
Workflow Methods
IExtensionData
IExtensionData allows you to access temporary workflow data that was previously stored in a system repository. This stored data can be associated with both internal and external systems.
GetExtensionData (IExtensionData)
Gets extension data.

Workflow IPI
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Service Interfaces
- Service Interfaces
- Workflow Methods
  - Workflow Methods
    Workflow provides a set of core service interfaces and call methods for you to use when creating a workflow. This section describes these core service interfaces and the associated call methods.
  - IArchiveManagement
    IArchiveManagement allows you to create an archive file and select the data to include.
  - IAuditTrail
    IAuditTrail allows you to write entries to the audit trail.
  - IDatabaseService
    IDatabaseService provides access to relational data, such as databases.
  - IDirectorySearch
    IDirectorySearch allows you to search the Directory of Resources for a set of resources based on a search query, or for a list of resources based on a resource class.
  - IEmailService
    You can use IEmailService to send emails as part of a workflow process.
  - IEquipment
    IEquipment allows you to read from and write to the Equipment model.
  - IEquipmentConfig
    IEquipmentConfig provides methods for configuring the equipment model.
  - IEquipmentHistorian
    IEquipmentHistorian allows you to read from and write to Historian tags.
  - IEvent
    IEventManager allows you to read from the Event model and to create an event subscription for a specific event resource.
  - IExtensionData
    IExtensionData allows you to access temporary workflow data that was previously stored in a system repository. This stored data can be associated with both internal and external systems.
    - GetExtensionData (IExtensionData)
      Gets extension data.
    - RemoveExtensionData (IExtensionData)
      Removes extension data.
    - StoreExtensionData (IExtensionData)
      Stores extension data.
  - IITService
    IITService allows you to read from the Proficy System model.
  - ILicense
    The ILicense service method provides access to active licensing information.
  - IMaterial
    IMaterial allows you to read from and write to the Material model.
  - IOpcClient
    IOpcClient allows you to read from the OPC Client model.
  - IOpcUa
    IOpcUa allows you to read from the OPC UA model.
  - IPersonnel
    IPersonnel allows you to read from and write to the Personnel model.
  - IProductionModel
    IProductionModel allows you to read from or write to the Production model.
  - IProductionReport
    IProductionReport allows you to read from the Production model.
  - IProductionRuntime
    The IProductionRuntime service interface relates to production oversight.
  - IProficyHistorian
    IProficyHistorian allows you to manage Historian servers, including reading from and writing to Historian collectors and tags.
  - IPropertyGroup
    IPropertyGroup allows you to read from or write to the properties of a resource.
  - IResourceLinking
    IResourceLinking allows you to work with resource links for all types of resources. You can start, edit, end, and query links between resources in your system.
- iFix Service Provider
Operator Task List in the Workflow Client
Best Practices

GetExtensionData (IExtensionData)

Gets extension data.

Inputs	Data Type	Description
key	String	Specifies the user-defined data extension key that was used to store the extension data.

Outputs	Description
String		Displays extension data that is retrieved.