In one of my books, I have some worksheets.
All the exercises and tasks have an @label so that the book will play nice with Runestone.
I was hoping to be able to structure the worksheet into a couple of parts, with subsection, or paragraphs, or some other way to get a couple of title headings in place.
There's no entry for worksheet in the schema browser, so I wasn't sure what was allowed.
But if I do either subsection or paragraphs, the labels from the exercises get printed in PDF.
Example:

This comes from
<exercise label="ex-ws-eigenvalue-1">
<task label="ex-ws-eigenvalue-1a">
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Removing the exercise label doesn't change anything: the stylesheet just moves up to the label at the next highest level, and prints that!
I've rewritten the worksheet without #paragraphs, but it does seem something is missing if it should be supported for a worksheet in PDF.