JATS sections have specified structure
Section-Head (labels, titles, licensing, section-metadata)
Section-Blocks (paragraphs, tables, figures, etc.)
Sections (sections may contain sections, AFTER section-blocks)
Section-Tail (typically notes, footnotes, ref-list)
Some section-like structures have full section model — (section, abstract, boxed-text, appendix)
Some section-like structures have partial section model — (statement)
Compatible models for these structures must have section structure or subset of it