Developing an Application

Reactive, Mobile and Traditional Web Modules

Reactive, Mobile and Traditional Web modules are the place to implement the UI interface that support a specific user process, such as UI flows, Screens and Blocks. You can also implement the logic directly related with that user process.

Service Modules

Service modules enforce the separation of concerns and encapsulation of core services that can be reused by several applications, abstracting either business concepts or business-agnostic services that extend the framework.

Library Modules

Use Library modules (or just Libraries) to encapsulate logic and UI patterns that are database independent, promoting the reuse of these elements within you factory.

Extension Modules

Extension modules (or just Extensions) allow you to integrate with enterprise systems and to extend the existing functionality and data model of OutSystems. Learn more on how to extend logic with your own code.

• Use Data

  Find information on how to define your data model, query the database and manipulate query results.

  Featured Article:

  • Data Modeling
  • Query Data
  • Download a file through browser

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• Design UI

  In this section, you can find information regarding how to define the navigation and user interface of your applications (CSS, Layout, Images), how to gather and validate input from users, and how to build an OutSystems UI Architecture to customize the look & feel of your applications..

  Featured Article:

  • Screen
  • Accessibility
  • Screen Templates

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• Implement Application Logic

  Learn more about implementing and reuse actions, iterating lists, and handling exceptions. Find more about the lifecycle of screens and blocks.

  Featured Article:

  • Edit expressions
  • AI-assisted development
  • Actions in Reactive Web and Mobile Apps

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• Use Processes (BPT)

  Use OutSystems Business Process Technology (BPT) to design and manage your business processes and integrate them into your applications.

  Featured Article:

  • Processes
  • Create a Process Flow
  • Use Callback Actions

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• Use Timers

  Learn how to use Timers to execute asynchronous logic.

  Featured Article:

  • Create and Run Timers
  • Monitor Timers

• Reuse and Refactor

  Reuse functionality from other modules to avoid repeated code and to achieve a modular design.

  Featured Article:

  • Use Actions to Encapsulate Logic
  • Expose and Reuse Functionality Between Modules
  • Handle Changes in Exposed Functionality

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• Secure the Application

  Learn how to define the security model for your applications. Use roles and permissions management to restrict access to application screens, interface elements and operations by its end users.

  Featured Article:

  • End User Management
  • User Roles
  • Restrict Access to an Internal Network

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• Troubleshooting Applications

  Learn how to troubleshoot and debug your applications.

  Featured Article:

  • Debugging Applications
  • Log Information in Action Flows
  • Troubleshoot Service Actions Using Logs

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• Merge the Work

  Integrate other developers' changes into your module by using the merge feature. It works with both visual and textual elements.

  Featured Article:

  • The merge feature and team collaboration
  • Compare and merge example with conflicts

Articles in this Section

• Application Templates

  Use application templates to bootstrap an app.

• Developing for Testability

• Service Studio Shortcuts