RELATED WORK First, a standardized metadata schema has become more important with regard to the reusability of AR content and the interoperability of AR applications [9]. In the ubiquitous computing environment, there are a myriad of embedded sensors and pervasive computers. To provide a context-aware service, these devices must interact and integrate the information provided by each of them [10]. In this respect, their heterogeneity causes problems in terms of the access, transformation, modification, transmission, and management of computing resources [11]. Therefore, it is necessary to formulate a metadata schema, which makes data reusable and operable on any system.