<Students>
@(collect :vars (NAME GENDER YEAR MONTH DAY (PET_TYPE "none") (PET_NAME "")))
@  (cases)
  <Student Name="@NAME" Gender="@GENDER" DateOfBirth="@YEAR-@MONTH-@DAY"@(skip)
@  (or)
  <Student DateOfBirth="@YEAR-@MONTH-@DAY" Gender="@GENDER" Name="@NAME"@(skip)
@  (end)
@  (maybe)
    <Pet Type="@PET_TYPE" Name="@PET_NAME" />
@  (end)
@(until)
</Students>
@(end)
@(output :filter :from_html)
NAME         G DOB        PET
@  (repeat)
@{NAME 12} @GENDER @YEAR-@MONTH-@DAY @PET_TYPE @PET_NAME
@  (end)
@(end)