options to maintain computed attributes?

hello, I may have a need soon to implement "computed" attributes in LDAP, to accommodate dumb clients that are unable to properly update the database for example, an attribute masterAttr may have values like "A:B" (its value updated by the dumb client), but other clients need the A or B part separately. So whenever masterAttr is updated with value "A:B", firstPartAttr have to be updated with "A" and secondPartAttr with "B" what are my options to achieve this? - is there an overlay like slapo-rwm but for attribute values? I searched but did not found anything. So I guess the answer is no. - using a combination of back-perl, back-relay and slapo-translucent? is that even possible - using back-sock as an overlay to monitor modifications and update the modified objects accordingly? - a script that monitor the accesslog database and update the modified objects accordingly? - biting the bullet and writing an overlay myself? before diving too deep into this issue (and possibly drowning), I figured I would ask. any thoughts? ideas? thanks in advance, best regards, Jephté CLAIN -- *Jephté CLAIN | Développeur, Intégrateur d'applications* Service Systèmes d'Information Direction des Systèmes d'Information <http://dsi.univ-reunion.fr> Tél: +262 262 93 86 31 <tel:+262262938631> || Gsm: +262 692 29 58 24 <tel:+262692295824> www.univ-reunion.fr <http://www.univ-reunion.fr> || Facebook <http://www.facebook.com/pages/Universit%C3%A9-de-La-R%C3%A9union-OFFICIEL... || Twitter <http://twitter.com/univ_reunion>