LS, As Perl is one of the main programming languages at our institute, I tried the Perl API with MonetDB-Xquery. I succeeded with sending mil statements (with the language parameter set to 'mil') to the server and getting the correct answer, but xqueries failed (with the language parameter set to 'xquery'). This was not a complete surprise as the documentation seems to be ambiguous ("MonetDB/XQuery for POSIX (Linux/Unix) platforms currently only supports MAPI (MonetDB API) to communicate with the XQuery engine."). Following the link to the API's: "Perl binding of the simple Monet API (Mapi) for MIL/SQL database interaction". So, I would like to know if my assumption that currently no xqueries are supported by the Perl API is correct. Peter