another one to consider is that product classification should be thought of as arbitrary efficient representations of a hierarchy subject to structural change a

another one to consider is that product classification should be thought of as arbitrary efficient representations of a hierarchy subject to structural change at any time. And that different customers can see different hierarchies. They're all simple problems once you start thinking about them int he right way, but getting them into a coherent architecture with minimimum spaghetfication is challenging. I'm definitely interested to hear about good agencies working in this space (not because I'm hiring).