table alignment tags in Org export

[Alex Fenton]

Hello,

Trying to export a table with alignment tags, e.g.


#+caption: left-, centre- and right aligned columns
| <l>    |   <c>    |      <r> |
| a      |    b     |        c |
| aaaaaa | bbbbbbbb | cccccccc |

In, for example, HTML or ODT output, the columns are aligned according 
to the tags in the first row.

If exporting to Org (org-org-export-as-org), the tags disappear - i.e. 
the table is as-was, minus the first row.

Is there a way to retain the alignment information when re-exporting to 
Org? - either a function or some setting somewhere

cheers
alex