Community feeds are used in two places. First of all, when retrieving a users feed, it is often desirable to retrieve only these events that are received as a result of following a community. However, in IBM Connections it is also possible to treat a Community as a user and retrieve a feed specific to that community. In this case the feed refers to all of the events that relate to objects that 'belong' to that community.
Filtering of a users stream based on events they receive as a result of following a community is reasonably simple and involves using the /communities application filter
When are treating communities as a 'pseudo-person', (for beta they are easily identifiable with a prefix 'c!' but this will be changed to a more standard id format for release)
This provides a list of all events relating to a community independent of who is following
This feed also verifies that the community is either public, or that the viewer is a member of the community (otherwise they would not have rights to view the feed)
Community feeds can be filtered by application just like any other users feed, including by status updates, which provides a view of the 'Community board'. Make sure that you substitute < communityid > with the correct unique ID of the community.
Community View: /activitystreams/urn:lsid:lconn.ibm.com:communities.community:< communityid >/@all
Filtered by Application: /activitystreams/urn:lsid:lconn.ibm.com:communities.community:< communityid >/@all/blogs
Filtered by Status Updates: /activitystreams/urn:lsid:lconn.ibm.com:communities.community:< communityid >/@all/status_updates