Importing complex XSDs can cause the Delphi XML Binding Wizard to crash. I've reported it a few times over the last few years and now I'm looking for alternatives.
The latest two automated Quality Central reports generated when importing ProcessSalesLead schema from the StarStandard set of schemas.
http://qc.embarcadero.com/wc/qcmain.aspx?d=98391
http://qc.embarcadero.com/wc/qcmain.aspx?d=98392
Schemas are available online and are widely utilized in the automotive industry http://www.starstandard.org/SIGXMLSTAR5/XMLSchemas