[% BLOCK sourcetab %]
[% END %] [% BLOCK mergesource %]

Source records

[% IF ( sourcerecords.size ) %] [% FOREACH record IN sourcerecords %] [% PROCESS sourcetab tabrecord=record %] [% END %] [% END %]
[% END %] [% BLOCK mergetarget %]

Destination record

[% END %]