The first attempt to create a data structure specifically for museum information was the Categories for the Description of Works of Art (CDWA) [12]. CDWA is an exhaustive element set of 512 categories and subcategories initially envisioned as “a standard to which existing art systems may be mapped and upon which new systems can be developed.” [13] It was hoped that CDWA would eventually become an SGML data format, following CIMI Framework recommendations, though that was never fully realized. CDWA has, however, become a common data structure for art museum information and serves as the underlying structure for various homegrown and vendor-based collection management systems.