Documenting the acceptable content values for <head type="supplied">
- Poems (for untitled collections of poems)
- Publisher's Catalog (for div type="publishers_catalog")
- Dedication (for div type="dedication")
- Preface (for div type="preface")
- Letter (for div type="letter")
- Chapter (for div type="chapter")
- Notes (for div type="notes")
- Imprint (for div type="docImprint")
- Epigraph (for div type="epigraph")
- Reviews (for div type="reviews")
- Frontispiece (for div type="frontispiece")
- Verso (for div type="verso")