Findings
Perhaps by making some modifications to UNIMARC, we can meet the cataloguing requirements of the mostly used information resource in Iran that is printed book, but due to rapid extension of digital resources and tendency to use them in Iran, limited capabilities of UNIMARC that is, not linking to digital resources and not having metadata schemes such as MARCXML, MODS, METS, and MADS, do not seem to draw a better future compared to MARC21.