在WCF数据服务的当前版本中，开发人员只能把一个流资源关联到某个给定的实体上。

Under the current version of WCF Data Services, developers can associate only one streaming resource with a given entity.

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轻松控制一个数据服务中的资源是否可见。

Easily control the resources viewable from a data service.

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PDB中心提供了一个元数据服务，来生成详细的RDF，联系两两LSID之间以及提供到外部资源的链接。

The PDB authority also offers a metadata service that generates comprehensive RDF that relates LSIDs to each other and provides links to external resources.

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