Hi Guys,
I am relatively new to pubsubhubbub and working on the certeorem<https://rometools.jira.com/wiki/display/INCUBATOR/certiorem>implementation of the spec. The current spec for Content Distribution<http://pubsubhubbub.googlecode.com/svn/trunk/pubsubhubbub-core-0.3.html#contentdistribution>(notification from hub to subscriber) has the following statement: "Essentially, in the single feed case the subscriber will receive a feed document that looks like the original but with old content removed" This seems to imply that the spec has some mechanism for supporting content distribution using a feed that only has entries that have been change since last Content Distribution. This seems to be extremely important for feeds with large number of entries that is changing frequently (which is my situation). Can any one share some details on what the spec behavior is related to delta content distribution, what holes if any are known to exist in spec in this area and what implementation experience we have with this. Thanks for your help.
