Consider a Caching Proxy Resolution Service that was also the direct authority for a certain set of LSIDs.
考虑这样一个缓存代理解决方案服务，它同时也是特定集合LSID的直接中心。
The PDB authority returns a mix of HTTP and FTP data locations, as well as SOAP endpoints that proxy data from those locations.
PDB中心返回的是一个混合描述，内容包括HTTP和FTP数据位置，以及从这些位置代理数据的SOAP端点。
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