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While many research projects in the world have been addressing challenges posed by digital preservation, digital libraries in China have their own native problems that have never been addressed before. Similar problems may occur in other countries, and their memory institutions may be less prepared to handle them. Quite often, information in the native special digital objects is also unique in world...
This article analysis the importance of Case Method in the teaching of Science of Naval Command, brings forward the necessity and significance of the building of Teaching Database of Science of Naval Command, and expatiates on design principles and structure of teaching case database of Science of Naval Command.
As the huge amount of XML data emerging in Web, researchers begin to focus on the topic of querying against XML data efficiently. Different from the query processing in relational data, XML query is characterized by structural join. Hence, quickly evaluating the cost of the join operation with the size of the intermediate results is an important part of XML query plan generation .In this paper, an...
This paper presents an ontology-based data integration framework that is capable of deriving an ontology from a collection of XML schemas in a semiautomatic manner and integrating heterogeneous XML sources at the semantic level. The ontology in our system is constructed following a layered approach where an intermediate model is introduced to explicate the underlying semantics of XML schemas and to...
This paper offers a systematical structure of a mobile solution that describes mobile subset basing on XML. This solution can not only efficiently solve the problem of two-grade synchronization and consistency maintenance on three-grade cache data among mobile client, synchronizing server and center server, but also make full use of cache data conveniently
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