Describe techniques for extracting from heterogeneous data sources.

简述异构数据源中的数据抽取技术.

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The paper use XML as the agency of heterogeneous data sources to realize data sharing.

选用以XML作为异构数据源的中介,实现异构数据源的共享.

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So we import the concept of Ontology to resolve semantics heterogeneous problem of heterogeneous data integration.

由此引入了本体的概念用于解决异构数据源集成中的语义异构问题.

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Grid adopts some open standards, with its own service format to transparently access heterogeneous data resources.

网格服务采用开放标准, 以其特有的“服务”形式为异构数据提供一致透明的访问.

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