A rant against MARCXML:

"MARCXML isn't as much XML as it is MARC; it's really MARC with a bad hairdo"

Slides give nice overview of MODS, METS, MARCXML, with links to examples

Apparently the entire LC authority file (unclear whether names, subjects or both), has been converted to MARCXML and is available to researchers. See http://www.ibiblio.org/fred2.0/readme.pdf

Blog entry describes converting MARC8 records to UTF-8 encoding (MARC to MARCXML). Snips of code included

Slides give nice overview of MODS, METS, MARCXML, with links to examples

Lots of links to metadata webpages

Sally McCallum's presentation at the RLG Forum (August 06).   Sound file of the presentation also available: http://www.rlg.org/en/downloads/Sally_McCallum.mp3 (View the slides while listening is best)