Hello Sergio,
the question has been asked on code2bib, the french equivalent to 
code4lib in July but didn't raise any answer as of today : 
https://groupes.renater.fr/sympa/arc/code2bib/2014-07/msg00006.html . 
The question was related to MARC::Lint in perl but you should be 
interested to contact Paul Poulain to see if he got something new since 
this message.

Regards,
Sylvain

Le 23/09/2014 17:26, Sergio Letuche a écrit :
> Is there any document or work done regarding UNIMARC format validation, say
> we need to have the rules in order to be able to validate any records we
> have against the valid values, or report wherever a certain tag is required
> and is missing for example.
>
> Thank you in advance