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Building and Configuring Workflows
Basic Activities
Data Access Activities
These activities are used for passing information and data between workflows and activities.
Read Data Items Activity
The Read Data Items activity allows a subprocess to access data items outside of the workflow. This activity reads data from the data items defined at the workflow or subprocess level to make them available to other activities.

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Building and Configuring Workflows
- Workflow Design Basics
- Workflow Foundations
- Task Management for Administrators
- Task Configuration
- Task Step Configuration
- Global Subprocesses
- Basic Activities
  - Activities Used to Create Workflows
    Activities comprise the main building blocks or steps that perform the actions in a subprocess or workflow.
  - Third-party Activities
    Workflow can utilize third-party activities that are compatible with Microsoft Windows Workflow Foundation.
  - Predefined User Activities
    A user activity defines part of a user-defined process in a workflow process step. For a workflow to run, all user activities must be valid (contain no errors) and enabled (active).
  - Data Access Activities
    These activities are used for passing information and data between workflows and activities.
    - Call Method Activity
      The Call Method activity allows you to use a call method from a service provider to access information in other areas of the application.
    - Call Web Method Activity
      The Call Web Method activity allows you to call an external web service method that contains parameters defined as part of the workflow.
    - Code Activity
      The Code activity allows you to write custom logic; therefore, you can augment the functionality of a workflow to meet your needs.
    - Index Activity
      An Index activity is used with any collection of data to look up a value at a specified index on the collection.
    - Read Data Items Activity
      The Read Data Items activity allows a subprocess to access data items outside of the workflow. This activity reads data from the data items defined at the workflow or subprocess level to make them available to other activities.
      - Configure a read for a Read Data Item activity
    - Write Activity
      The Write activity performs a set of writes to workflow variables. The source of each write can be an expression, a bind, or a user-defined absolute value.
    - Write Data Items Activity
      The Write Data Items activity allows a subprocess or step to access data items outside of the workflow. The Write Data Items activity writes data to data items at the workflow or subprocess level.
  - Workflow Control Activities
    These activities are used for creating changes in a workflow, such as starting or stopping activities, during run time.
  - Message Queue Activities
    These activities are used for working with a messaging queue in order to co-ordinate work between workflows and activities.
  - Flow Control Activities
    These activities are used to create multiple execution layers within workflow logic.
  - Event-based Activities
    These activities are used when you require workflow logic to start an event during run time.
  - Keyword Activities
    You can use keywords to replace text in work instructions and email subjects and bodies. This text is replaced with keyword values in a workflow at run time.
  - Operator Activities
    These activities are used by operators when a workflow is running the Task List.
  - eSOP Activities
    These activities are used when working with the eSOP Editor.
- Schedules
- Faults
- Test Workflows
- Debug Workflows
- Track Data
- Web Services Service Provider
- Legacy Workflow Web Service
- Categories
- Completion Codes
- Actuals
- REST APIs
eSOP
ActiveX Task Controls
Service Interfaces
Operator Task List in the Workflow Client
Best Practices

Read Data Items Activity

The Read Data Items activity allows a subprocess to access data items outside of the workflow. This activity reads data from the data items defined at the workflow or subprocess level to make them available to other activities.

Note: Data items must be configured with an Equipment model resource at either the workflow or subprocess level.

For more information, see Data Items and Equipment model.

Reads

Reads can be added to or removed from the Read Data Items activity. When you add a data item to the Read Data Items activity, a data item block is presented, displaying the input and output parameters. Input and output parameters vary depending on the data item you select. The parameters can be anything related to the data type of the data item selected.

Using the read value

To use the value from a Read Data Item activity in a workflow, you can create an expression, or you can bind an activity in the workflow to an output parameter of the Read Data Item after the Read Data Item activity in the workflow.