CEPIC/IPTC Metadata Handbook
Want an overview of how metadata works, where to enter it, how to embed it in IPTC fields?
CEPIC has published a the CEPIC/IPTC Metadata Habndbook for all people handling and dealing with images. The Handbook is written to be accessible to anyone, not just technical people, and has some interactive charts to help you plan your own metadata workflow.
The Guide was written by Sarah Saunders of Electric Lane with the participation of the IPTC Photometadata Working group.