Need full information on details of readung crystal reports data from XML

I am trying to get the details on the capabilities and requirements for reading an external data set, XML, CSV, etc. And allowing Crystal Reports to generate reports on this data.

As the datasets will be large, more than (100000 rows), XLS and CSV don't appear to be the right file formats. XML may be better, but I need the specifics on how each one is digested by Crystal reports.

Maybe there is a native format that works better...

For this project, I am not building the actual reports, but am preparing the data sets to be read by Crystal Reports.

Is there a specific document that contains all the particulars, and limitations of the relevant interfaces?

For XML, what styles are most easily consumed by CR? DTD?

I seem to be getting the runaround from SAP, and need to produce a proof of concept for this project in very short order.

Your help would be most appreciated.