Books.

_Everything is Miscellaneous_, David Weinberger.

This is a non-fiction book with a Theme; nay, a Declaration, and it tells you that theme in the title and repeats it almost as often as the title of This is the title of this story, which is also found several times in the story itself. appears in that illustrious work.

Now I will explain the book to you so that you don't have to read it: when a collection of things reaches a large enough size, which is probably somewhere in the hundreds to thousands range, it becomes less useful to have those items arranged in a single hierarchy and more useful to tag each item with searchable attributes, which will then allow a user to search for the Right Thing or Things in a manner which is useful to them.

Corollary: having users add tags themselves can be a big win.

Weinberger makes this point many times, with various amusing and entertaining anecdotes to illiustrate it. Then he makes the point again...

Books.

_Everything is Miscellaneous_, David Weinberger.

This is a non-fiction book with a Theme; nay, a Declaration, and it tells you that theme in the title and repeats it almost as often as the title of This is the title of this story, which is also found several times in the story itself. appears in that illustrious work.

Now I will explain the book to you so that you don't have to read it: when a collection of things reaches a large enough size, which is probably somewhere in the hundreds to thousands range, it becomes less useful to have those items arranged in a single hierarchy and more useful to tag each item with searchable attributes, which will then allow a user to search for the Right Thing or Things in a manner which is useful to them.

Corollary: having users add tags themselves can be a big win.

Weinberger makes this point many times, with various amusing and entertaining anecdotes to illiustrate it. Then he makes the point again...