Some Requirements Complex, Even for People

• The table-wrap/@id values must be in numerical order
• Warn when <article article-type="introduction"> does not contain a section entitled “Foreword”, “Preface”, or “Introduction” (unless there is a contrib[@role] with the value “Feature Editors”)
• Requirement: If the reference list contains
  • more than three journal citations
  • that have been published after 1950
  then warn when not even one
  • <mixed-citation publication-type="journal">
  • contains a DOI