UNIMARC validation rules

From: Sergio Letuche <code4libuserx_at_nyob> Date: Tue, 23 Sep 2014 18:26:52 +0300 To: CODE4LIB_at_LISTSERV.ND.EDU

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