![]() This implementation allows the server to transfer a minimal description of changes instead of transferring an entirely new instance of a resource cached on the client. ![]() To limit its impact on servers, the Feed Download Engine implements HTTP conditional GET combined with Delta encoding in HTTP (RFC3229). Optionally, schedule downloads of enclosures with Background Intelligent Transfer Service (BITS).Purge older items from the feed store when the predetermined maximum number of items have been received.Merge new feed items with existing feed items in the feed store. ![]() (The native format is essentially a superset of all supported formats.) To do this, the Windows RSS Platform requires Microsoft XML (MSXML) 3.0 SP5 or later. Transform the feed source into the Windows RSS Platform native format, which is based on RSS 2.0 with additional namespace extensions.The Feed Download Engine downloads feeds and enclosures via HTTP or Secure Hypertext Transfer Protocol (HTTPS) protocols only. Connect to the Web site, and download the XML source of the feed.When synchronizing a feed, the Feed Download Engine performs the following tasks: This topic contains the following sections. ![]() This overview explains how the Feed Download Engine works and how to control it through the Windows RSS Platform API. The Feed Download Engine is used for downloading Really Simple Syndication (RSS) feeds from Web sites.
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