Topic links 4.0

It seems you might be referring to a specific topic or concept titled "Topic Links 4.0." However, I need more context to provide a relevant response. "Topic Links" could pertain to a variety of subjects, such as technology, education, or even the structure of information across the web. If "4.0" signifies a particular version of a software, framework, or methodology, please provide more details so I can assist you better. Let me know what specific information you're looking for!