Publisher X Validation

layered over a DTD

• Articles are valid to the DTD, but
• Schematron adds a separate validation layer
  • Journal-specific validation
  • Article-type-specific validation
  • Validation against authority files
    (@citation-type values in references-authority table)
• Models tightened by type of content
  (If you are a book citation, there are elements you must have)
• Lifecycle-specific validation

Less and less is enforced by DTD and more and more is enforced
by Schematron