first faceted system?

Daniel Tunkelang, chief scientist at Endeca, has passed on an excellent entry on perhaps the first faceted system. It's actually come at a very timely point during the JCDL08 conference, where faceted browsing has been quite core to a number of discussions. I'll post more about this later. Someone even asked me about Ranganathan's colon classification (research core to the start of faceted classifications) after my talk on a longitudinal study of faceted and keyword use, and now i have link to research it further - thanks Daniel.