1 This files describes API changes in /dataformat/ download system,
2 information provided here is intended especially for developers.
5 * The following methods have been added to the base dataformat class to allow instances to export to a local
6 file. They can be overridden in extending classes to define how files should be created:
7 - start_output_to_file()
8 - close_output_to_file()
9 * Calls to the following dataformat plugin methods have been removed:
14 * In order to allow multiple sheets in an exported file the functions write_header() and write_footer() have
15 been removed from core dataformat plugins and have been replaced.
16 - write_header() has been replaced with the two functions start_output() and start_sheet().
17 - write_footer() has been replaced with the two functions close_output() and close_sheet().
18 For backwards compatibility write_header() and write_footer() will continue to work but if used will
19 trigger the function error_log().
22 * Added new plugin system with low memory support for csv, ods, xls and json