Although we are not trying to promulgate our DTDs, we have linked to the PDF versions below in response to inquiries for more information. Maps from Marc to our DTDs are being withheld until local implementation can be tested. To parallel Marc somewhat, we have named specific elements with their Marc tag, prefixed with 'f' for fixed or 'v' for variable and suffixed with the subfield value. For container elements, groupings were necessary as multiple tags were being subsumed. This scheme should give way to meaningful names eventually.
Attributes vary by element, but are listed together as overview.
One area of interest has been entries which have subtle differences to other entries, e.g. we assign MeSH headings to corporate names, which need to be kept separate from authorities for MeSH headings. Once again, our DTDs are only intended to demonstrate feasibility of using XML for a Marc-like format and not to represent preferred decisions for any specific fields. They are intended to encourage review and simplication of an overly complex scheme which hampers deployment of bibliographic data on the web.