Those who deal with metadata, and trying to decide an item’s true place in a hierarchy might consider Bachelard’s Poetics of Space. It’s a lovely (though dense) examination of physical spaces and their associations: how we shape them and then how they shape us. Moreover he looks at those elements that make a thing known as itself: what makes a corner a corner? What is the nature of nest-ness? When is a house a hut?
Sadly the Amazon excerpt doesn’t do justice to this book’s grace at all, and makes it look more daunting. Be brave and check it out.