The following, in order:

• <object-id> Object Identifier, zero or more

• The following, in order:

  • <sec-meta> Section Metadata, zero or one

  • <label> Label (of an Equation, Figure, Reference, etc.), zero or one

  • <title> Title, zero or one

  • Any combination of:

    • <address> Address/Contact Information

    • <alternatives> Alternatives For Processing

    • <array> Array (Simple Tabulation)

    • <boxed-text> Boxed Text

    • <chem-struct-wrap> Chemical Structure Wrapper

    • <fig> Figure

    • <fig-group> Figure Group

    • <graphic> Graphic

    • <media> Media Object

    • <preformat> Preformatted Text

    • <supplementary-material> Supplementary Material

    • <table-wrap> Table Wrapper

    • <table-wrap-group> Table Wrapper Group

    • <disp-formula> Formula, Display

    • <disp-formula-group> Formula, Display Group

    • <p> Paragraph

    • <def-list> Definition List

    • <list> List

    • <tex-math> TeX Math Equation

    • <mml:math> Math (MathML 2.0 Tag Set)

    • <related-article> Related Article Information

    • <related-object> Related Object Information

    • <ack> Acknowledgments

    • <disp-quote> Quote, Displayed

    • <speech> Speech

    • <statement> Statement, Formal

    • <verse-group> Verse Form for Poetry

    • <x> X - Generated Text and Punctuation

  • <sec> Section, zero or more

  • Any combination of:

    • <notes> Notes

    • <fn-group> Footnote Group

    • <glossary> Glossary Elements List

    • <ref-list> Reference List (Bibliographic)