Our aim is the management of the metadata related to the digital rights in centralized systems or networks with indexing capabilities for both text and similarity searches, providing the basic infrastructure enabling the private use arid the commercial exploitation as well. We present an innovative approach that treats the DRM metadata as metric objects, enabling similarity search on IPR attributes between digital items. Moreover we show how the content base similarity search can help both the user to deal with a huge amount of similar items with different licenses and the content providers to detect fake copies or illegal uses.
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