Content of the type attribute on the top level div

[stenskjaer]

<div id="wodehamabbreviatio" type="abbreviatio"> <!-- top level expression -->

Does this have a simple answer? Abbreviatio covers a type of text that occurs often in the sentences context, but would never happen (to my knowledge) in a Aristotelian commentary. So this type cuts in at a maybe arbitrary level, as you might also write "sentence-commentary" here, or what?

Would other possible values be something like "quaestiones" and "expositio"?