A site is a collaborative area for a unit of work or a project.
Activities refer to updates to content within a site, including uploaded files, blogs, discussions, calendars, and the team wiki. The methods available for the Activities service are grouped into the Post activity and Feed controls object types.
A tag is a non-hierarchical keyword or term assigned to a piece of information. The root object used to access these services is taggingService.
A thumbnail is a transformation of content into a specified destination MIME type. This is most commonly an image of a particular size, but can also be other things, for example, a Flash rendition. The Thumbnail service transforms and maintains this thumbnail.
A rendition is an alternative representation of a content node. Renditions are derived from their source nodes and are usually updated automatically when their source node is updated.
Authority is a general term to describe a group, user, or role. The Authority service provides the following methods to retrieve groups. The authority service makes the groups root object available.