preserve CWE-559 as another parent of CWE-560, but shift the relationship to the Development Concepts view (CWE-699).
Identification of Perspective Issues
During construction of the Research view, sometimes there would be confusion with respect to how to classify a weakness. In some cases, this was due to knowledge gaps within CWE, and sometimes these would be resolved. In other cases, multiple classifications remained, and we preserved these. We suspect that when there are multiple classifications, there are differences of perspective. However, we could not investigate this problem deeply before the CWE 1.0 release.
One of the main examples of the perspective problem is in chains and composites. We found that much of the classification task was simplified once we learned how to recognize chains. It may be that some of the weaknesses with multiple parents are composites.