Can style sheets be used to describe how to present a document at different levels of detail?
One idea is to introduce a new @ command into CSS, e.g.
@detail medium { p { speak: none } p.abstract { speak: normal } }
Alternatively we could adapt the @media command for this, e.g.
@media aural detail=low { p { speak: none } p.abstract { speak: normal } }
It seems valuable to be able to parameterise the @media command for this purpose.