Required Elements of the IB_XMLDA Structure

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Before calling any of the three XML functions, you must set the following elements of the IB_XMLDA structure:

1. xmlda_file_name is the name, including complete path, of the file to which the XML output should be written. Only isc_dsql_xml_fetch() and isc_dsql_xml_fetch_all() require this name.
2. xmlda_version should be set to 1, indicating that the parser should use the XSQLDA descriptor area, rather than the older SQLDA descriptor area.
3. xmlda_status should be set to zero the first time isc_dsql_xml_fetch() is called. It does not have any effect in isc_dsql_fetch_all(), but it is recommended that you set it to zero. It is used internally by the XML functions to keep status.