Thanks. With your pointers, I got it.
I'm using:
<rscs>
<hyphrule<br/> brkafchr="- / @ \ . = a b c ... A B C ... 0 1 2 ...">
brkalways="1"
clbrkok="1"
language="para_context_component_monitored_item"
minpush="1"
nobrkchr="1"
pgbrkok="1"
...
</rscs>
...
The XML output by my semantic table includes this (the content of this para
originates in the authored element "component"):
<para role="para_context_component_monitored_item">
<att>
<specval attname="role" attloc="para"<br"/>attval="para_context_component_monitored_item">
<c...