A few years ago, there was some work being done in Portugal for
UNIMARC and MARC21 validation via XML schemas:
On Mon, Feb 15, 2010 at 2:14 PM, Houghton,Andrew <[log in to unmask]> wrote:
> Does anybody know whether the MARC formats ... are encoded in
> an XML format that one might use for processing/validation of the
> leader, field tags, indicator codes, subfield codes, field and subfield
> repeatability, and field and subfield requiredness.