in bo 5.1  there is  no  xml data providers, there is no web connect data providers,we can not save exelform in bo 5.1

from bo 6.1 on wards these are all provided

With BusinessObjects 6.1

 you can use the output of one query as the input to
another. You build your first query, then reference it in the second. This allows for
the creation of more complex queries.