GdaXmlConnection Management of connections to XML data sources @Returns: @filename: @Returns: @string: @Returns: @xmlcnc: @filename: @Returns: @xmlcnc: @string: @Returns: @xmlcnc: @Returns: @xmlcnc: @dsn: @xmlcnc: @Returns: @xmlcnc: @username: @xmlcnc: @Returns: @xmlcnc: @password: