UCI includes worldwide scope, so that no same contents with the same identifiers can exist in case that identification scope is extended by applying a unique identifier to a single content worldwide.
The same identifier cannot be provided to different contents in order to identify the contents.
Legacy support indicates a feature to accept the existing identification scheme. In UCI, legacy support is defined as accepting such existing identifiers as ISBN, ISAN and DOI, in the instance code of syntax.
UCI identification code can be resolved to concerned URL or other linked information.
UCI identification metadata provides semantic mapping information to each element to support linkage functionality, due to interoperability guarantee with essential metadata of the URN-based identification scheme. Through this mapping information table, users can easily understand the UCI identification metadata.
UCI is open to all users in principle, and hence, registration agency reveals metadata information to the extent for general users to identify contents.
UCI operation structure is vertical and consists of registration authority, registration agency and registrants.
A work can be realized in various forms, such as a digital medium and performance, and such realization maintains identification in meaning and comprises polymorphism of realization medium. The UCI identification scheme provides digital realization, namely identification code targeting digital instance. The UCI provides different UCIs to different digital instances in terms of different works or the same work in principle.
Though the identifier code should guarantee the preciseness of metadata in the UCI identification metadata, the Dumb Down principle, based on which the identification of metadata meaning is useful, should be complied with, without such auxiliary accuracy.
Dumb Down Principle : In case of mapping metadata with sub elements and the metadata with several repeated values without sub elements, listing values meaninglessly in one of the top level elements.
