“…Standardized or good quality metadata is important for describing and managing digital objects of different formats (Moulaison Sandy, & Dykas, 2016;Ochoa & Duval, 2009;Park, 2009;Robertson, 2005) and it enables end users to easily and effectively search, find and retrieve information from the repository (Jones, 2007;Jones et al, 2006;Pinfield, Gardner, & MacColl, 2002). But repositories differ widely in the handling of metadata schema (Gibbons, 2004) and the qualified Dublin Core has been the choice of researchers for organizing and harvesting open knowledge objects (Gibbons, 2004;Teli, 2015;van der Graaf & van Eijndhoven, 2008).…”