Classes versus Concepts Taxonomies

As I also post these entries on LinkedIn as well as other social media, sometimes a discussion will take off on one of the social media sites, and is not shown here on this blog. One of the most interesting responses to the True relationship between parent and childpost was on LinkedIn and covered what is the nature of nodes in one's taxonomy. Does each node represent a class or a concept? Denise B. of Kent State University raised this thought, and said that often one needs two taxonomies one where the nodes are classes and another where the nodes are concepts. The nature of your taxonomy will then define the nature of the parent-child relationship. In a class based taxonomy, the child is a subclass of the parent where the child has all the kinds of attributes of the parent and then has some special attributes specific to the child class. With a concept based taxonomy, we would then see each node embodies a concept and hence the relationship to a child node is not so strict. Thanks to Denise on the response.