对异构型分布数据源的统一访问
决策支持：许多决策支持场景，如那些处理财务分析和报告的场景，需要访问分布于各种数据源中的数据。
Decision support: Many decision-support scenarios such as those that address financial analysis and reporting require access to data distributed across a wide range of sources.
SPARQL 被设计成能够查询 Web 上分布的多个数据源。
SPARQL was designed to be capable of querying multiple data sources distributed across the Web.
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