<ab> (anonymous block) contains any arbitrary component-level unit of text, acting as an anonymous container for phrase or inter level elements analogous to, but without the semantic baggage of, a paragraph. [16.3 Blocks, Segments, and Anchors]
<div type="book" n="Genesis"> <div type="chapter" n="1"> <ab>In the beginning God created the heaven and the earth.</ab> <ab>And the earth was without form, and void; and darkness was upon the face of the deep. And the spirit of God moved upon the face of the waters.</ab> <ab>And God said, Let there be light: and there was light.</ab> <!-- ...--> </div> </div>