The Note at the bottom of 8.3 Try/catch is not entirely true anymore since the introduction of the rollback-output attribute. The current Note is:

<quote>
If an error occurs while evaluating an instruction within xsl:try, then no instruction within the xsl:try has any effect on the result returned by the xsl:try instruction. This means that if a processor is streaming the output to a serializer, it needs to adopt a strategy such as buffering the output in memory so that nothing is written until successful completion of the xsl:try instruction, or checkpointing the output so it can be rolled back when an error occurs.
</quote>

My proposal would be to extend the note with something along those lines:

<proposal>
[...] so it can be rolled back when an error occurs, unless the setting for rollback-output is set to no, as explained in the next section.
</proposal>