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Changes to Content Delivery client-side software

Upgrading may involve migration or the installation of new client software.

If your current Content Delivery client environment uses the API (RESTful) role, also called the Content Interaction Libraries or CIL, note that SDL Tridion Sites 9 introduced a new API, called Public Content API, alongside it. Using the Public Content API is optional; you can continue using the CIL, which you must upgrade.

If your current Content Delivery environment is itself an upgrade from the SDL Tridion product, your current Content Delivery environment may still use the API (in-process) role, which was already deprecated as of SDL Web 8. You can continue to upgrade this role, or you can migrate to the RESTful API introduced in SDL Web 8, and optionally to the new Public Content API introduced in SDL Tridion Sites 9.