I am trying to read the volume data of EMC Celerra, I am trying to read the volumes total available size and total free space (altogether of every volume). I tried to use XML API "VolumeQueryParams" but this API gives data separately for each volume of different types also there are some volume type for which their is no 'FreeSpace' tag in response receive, what does that mean?

I want a descriptive schema for XML API "VolumeQueryParams", also is their any way to get data for all volumes altogether.

Is their any latest version for document 'XML_API_v2_Guide.pdf'?