Bonita 6 WEB REST API - Get cases and their case variables.

Here's the current Bonita 6 WEB REST API call: {server address}/case?p=0&o=start&f[]=state:started&f[]=processDefinitionId:{processId}

It returns the following sample results: [ { "id": "9049", "end_date": "", "startedBySubstitute": "1", "start": "2014-08-04 11:25:47.625", "state": "started", "rootCaseId": "9049", "started_by": "1", "processDefinitionId": "6542310678011325631", "last_update_date": "2014-08-04 11:25:47.625" }, ... ]

In Bonita 5, I could make a queryRuntimeAPI getProcessInstances call that would return all the cases with their associated client variables. In Bonita 6, it returns the cases with only the system variables (case's Id, processDefinitionId, start date, etc).

Because I need to get large amounts of cases back in Bonita 6 and all their case variables, it’s not optimal for me to get all cases and individually make API calls for each case’s client variables. Does anyone have a suggestion on how to get a list of cases with all their variables included in the results for Bonita 6? Is there a flag or url param I need to set in the Bonita 6 WEB REST API call to do so? Is there a batch request WEB REST API call available?

I've tried "&d=" in my Search call to expand the data returned, but the only one I've found that seems to be supported is processDefinitionId. I could just be using the wrong name for that param though, but I haven't had much luck in blind guessing.