These dtds are not the latest revision. Also see the directory ./ISO-12083. The ISO dtds are derived from the original AAP dtds and should be used instead. The AAP standards are held by the Electronic Publishing Special Interest Group (EPSIG) that had been associated with OCLC, but has since been taken over jointly by GCARI (Graphics Communication Association) and McAfee and McAdam. The contact addresses I have are: Ms. Robin Canami Michelle Wulffaerat McAfee and McAdam GCARI PO Nox 328 PO Box 2888 Bel Air, MD 21014-0328 Alexandria, VA 22314-2888 USA USA +1 410 893 1340 +1 703 519 8184 Either contact should eventually be able to help you order the AAP Electonic Manuscript Markup documents (the "old" AAP stuff) and the ISO 12083 standard. These organizations also give tutorials on the ISO 12083 standard. Furthermore, you should be able to order a copy of ISO 12083 from ANSI: American National Standards Institute 11 West 42nd Street, 13th Floor New York, NY 10036 USA Also, one can order ANSI NISO standards via: NISO Press PO Box 338 Oxon Hill, MD 20750-0338 USA +1 800 282-NISO (6476) or +1 301 567-9522