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Current Path : C:/Users/Mahmood/Desktop/moodle8/dataformat/
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Current File : C:/Users/Mahmood/Desktop/moodle8/dataformat/upgrade.txt

This files describes API changes in /dataformat/ download system,
information provided here is intended especially for developers.

=== 3.4 ===

* In order to allow multiple sheets in an exported file the functions write_header() and write_footer() have
  been removed from core dataformat plugins and have been replaced.
  - write_header() has been replaced with the two functions start_output() and start_sheet().
  - write_footer() has been replaced with the two functions close_output() and close_sheet().
  For backwards compatibility write_header() and write_footer() will continue to work but if used will
  trigger the function error_log().

=== 3.1 ===
* Added new plugin system with low memory support for csv, ods, xls and json