Where is the source code for the IBM Watson SDK located?

The source code for the IBM Watson SDK is indeed found in the IBM Watson Developer Cloud repository on GitHub. This repository serves as a central hub for various SDKs related to the IBM Watson services. Developers can access the code, contribute to its development, and utilize the SDK for integrating Watson services into their applications. By hosting the source code on GitHub, IBM promotes collaboration among developers, allowing them to share enhancements, report issues, and contribute to ongoing improvements.

In contrast, other options do not contain the actual source code. The IBM Watson Knowledge Center primarily provides documentation and API references rather than code itself. The IBM Bluemix documentation focuses more on deployment and usage of services in the IBM Cloud rather than the SDK's source code. Lastly, the IBM DeveloperWorks site provides a wealth of resources and community forums but does not serve as a direct repository for the SDK source code. Thus, the correct choice reflects a platform specifically designed for hosting and managing code.