A TRS defines a base of member resources and a change log of creation, deletion or modification change events. The member and changed elements are URLs to the resources, the TRS does not contain any data from the resources themselves.
A TRS change event can include a TRS Patch element that provides the changed property values without requiring the TRS consumer to do an additional GET on the resource.
However in most cases, a TRS consumer that needs actual resource data from base or changed members of a TRS will need to do individual GETs on each of the resources in order to establish initial copies, or update existing copies.
This can be a very inefficient and time consuming process for TRS resources that have a large number of rapidly changing members.
There is a need to provide a more efficient way of getting information from more than one tracked resource at a time so the GETs can be batched together and included inline in a resource.