Do you mean just the 'CONTENT DESIGNATOR HISTORY' at the bottom of each page? http://www.loc.gov/marc/bibliographic/bd4xx.html --Dave ================== David Walker Library Web Services Manager California State University http://xerxes.calstate.edu ________________________________________ From: Code for Libraries [[log in to unmask]] On Behalf Of Jonathan Rochkind [[log in to unmask]] Sent: Wednesday, January 27, 2010 11:59 AM To: [log in to unmask] Subject: [CODE4LIB] marc documentation? I know I've seen documetnation on the LC site before for since-abandoned marc bib tags, like 400. But I can't for the life of me find it now navigating around the website or googling. does anyone know where this is? Jonathan