slapo-rwm : concatenate rule

[Anthony Milan <anthony.milan@laposte.net>]

Hi,

I would like to create a rewrite rule with slapo-rwm using back-relay to
concatenate two different attributes in an other one? Something like
this with an approximate syntax:

map attribute cn concat(givenName sn)

or with Perl syntax:

map attribute cn "$givenName $sn"

Is it possible to do this with rewriteRules directives?

Thanks for help,
-- 
Anthony Milan