It appears you might be referring to "Topic Links 3.0" or a similar term, but without specific context, it's difficult to provide a precise answer. Here are a few possibilities:
1. **Topic Maps**: Topic Maps is an ISO standard (ISO/IEC 13250) for the representation of knowledge structures and their relationships through topics. Version 3.0 may refer to an updated iteration or set of principles related to Topic Maps.
2. **Linking Technologies**:


