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This Help Center provides documentation on all aspects of the HCL Commerce+ Transaction Server product, from installation and deployment to operating and customization.
Extending
Using Commerce+ Transaction Server's xC programming model, you can use HCL-provided extension points to extend existing Commerce logic. You can implement these extensions with the xC Customization toolkit provided by HCL. Commerce+ also provides Packaged Business Capability integrations that extend the product's reach and functionality.

Documentation
This Help Center provides documentation on all aspects of the HCL Commerce+ Transaction Server product, from installation and deployment to operating and customization.
- Overview
  Welcome to the HCL Commerce+ Transaction Server overview. Explore these feature overviews to learn how Commerce+ Transaction Server operates. Refer to the related links listed at the end of each topic to access expanded product documentation.
- Deploying
  This section provides details on deploying HCL Commerce+ Transaction Server. It explains how to download the Docker images and Git bundles that comprise the product, how to create a minimal environment, and how to plan for a full deployment. It details supported software versions, patches, and configurations to ensure the platform performs well.
- Migrating
  The following topics show how to migrate an existing HCL Commerce Version 9.1 environment to Commerce+ Transaction Server.
- Operating
  The topics in this section focus on tasks that are performed by business users, marketers, and customer support representatives to connect with partners and attract and satisfy customers.
- Administering
  The site administrator performs the tasks needed to support day to day operations of the Commerce+ Transaction Server site.
- Extending
  Using Commerce+ Transaction Server's xC programming model, you can use HCL-provided extension points to extend existing Commerce logic. You can implement these extensions with the xC Customization toolkit provided by HCL. Commerce+ also provides Packaged Business Capability integrations that extend the product's reach and functionality.
  - Customizing
    The topics in the Customizing section describe tasks performed by an application developer to customize Commerce+ Transaction Server.
  - Developing stores
    Commerce+ Transaction Server offers customizable features for storefronts using the Next.js framework. Commerce+ Transaction Server supports headless commerce to use any front end storefront.
- Securing
  These topics describe the security features of Commerce+ Transaction Server and how to configure these features.
- Performance
  Topics in the Performance section describe the means by which to plan, implement, test, and re-visit the optimization of Commerce+ Transaction Server site performance.
- Troubleshooting
  Topics in the Troubleshooting section highlight common issues that are encountered with Commerce+ Transaction Server, and how they can be addressed or mitigated.
- Reference
  Topics in the Reference section contain all of the Commerce+ Transaction Server reference documentation.

Extending and integrating Commerce+ Transaction Server

Using Commerce+ Transaction Server's xC programming model, you can use HCL-provided extension points to extend existing Commerce logic. You can implement these extensions with the xC Customization toolkit provided by HCL. Commerce+ also provides Packaged Business Capability integrations that extend the product's reach and functionality.


	With the following customisation, Commerce+ Transaction Server allows you to implement your own business logic: Command extensions, which you can create and test yourself using the xC development environment. The term `xC` stands for Externalized Customization: customizations that are external to the default Commerce+ Transaction Server platform logic. The existing Commerce+ Transaction Server code runs on a dedicated Transaction server, whereas your custom xC code runs on a Customization server. By isolating the custom code you can easily and frequently upgrade without worrying about HCL overwriting your customizations.
	Commerce+ Transaction Server software integration uses self-contained, prebuilt, and reusable business functions. These functions are designed to work together as part of a fully integrated solution or independently as part of your organization's systems and processes.