Add a note about rr:column using an example. The section should be self-contained so that it can be removed in case rr:column is removed from the core specification.
All occurrences of `rr:column`` have been removed, and a small section has been added in "considerations." If that section looks good to the others, we can close this issue.
Add a note about
rr:column
using an example. The section should be self-contained so that it can be removed in caserr:column
is removed from the core specification.