Right, as can see by page 9 of the book, traditional library cataloging techniques, e.g., the Dewey Decimal System, has a tough time knowing just where to catal

Right, as can see by page 9 of the book, traditional library cataloging techniques, e.g., the Dewey Decimal System, has a tough time knowing just where to catalog a book, say, History of Nineteenth Century European Military Technology, that is, in history, Europe, European history, military history, history of technology, military technology, European technology, etc.? So, facets are a generalization of the Dewey system that is supposed to provide better options for such cataloging challenges. Okay. In a sense Google's YouTube has a similar problem: Often, maybe usually, at the end of playing a video clip, there is a display of related video clips. So, if play a video of Heifetz playing the Beethoven violin concerto with von Karajan (assuming there is such), then what to recommend next, anything by Heifetz, Beethoven, violin, von Karajan, or any concerto, any violin concerto, any violin music, or just something related artistically, determined however, any music from near year 1800, etc.? Right, there needs to be a better way. Okay, been working on that. Got some ideas and the code written. Loading some initial data now, and intend to go live ASAP.