Never achieved in classification.
There’s always that one odd item that sticks out like a sore thumb. Tonight I classified over 150 books for /usr/lib, and found what I created to be swiss cheese. Which does not make the information architect side of me happy as everything needs a place. But the other part of me really likes knowing about the grey areas and seeing the interconnectedness of all of the topics.
But it’s there. And right now done is good. Cleanup will come later. Along with tweaking the classification in Protege (ontology editor).