An extended environment data structure that is part of a digital asset that is transmittable over one or more multi-tiered networks. The data structure has one or more common descriptors to provide a unique identification of the digital asset on the networks; one or more asset dependency descriptors...http://www.google.se/patents/US20030131084?utm_source=gb-gplus-sharePatent US20030131084 - Extended environment data structure for distributed digital assets over a multi-tier computer network
