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<p><b>Abstract</b>—<it>Digital libraries</it> are concerned with the creation and management of information sources, the movement of information across global networks, and the effective use of this information by a wide range of users. A digital library is a vast collection of objects that are of multimedia nature, e.g., text, video, images, and audio. Users wishing to access the digital library objects may possess varying capabilities, preferences, domain expertise, and may use different information appliances. Facilitating access to complex multimedia digital library objects that suits the users' requirements is known as <it>universal access.</it> In this paper, we present an object manifestation approach in which digital library objects automatically manifest themselves to cater to the users' capabilities and characteristics. We provide a formal framework, based on Petri nets, to represent the various components of the digital library objects, their modality and fidelity, and the playback synchronization relationships among them. We develop methodologies for object delivery without any deadtime under network delays.</p>
Digital libraries, universal access, Petri nets, multimedia.

V. Atluri, S. Banerjee, I. Adiwijaya, N. R. Adam and R. Holowczak, "A Dynamic Manifestation Approach for Providing Universal Access to Digital Library Objects," in IEEE Transactions on Knowledge & Data Engineering, vol. 13, no. , pp. 705-716, 2001.
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