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MDL-56046 dataformat: added related information to upgrade.txt

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Mark Nelson
2017-06-26 13:59:30 +08:00
parent eb26be5b39
commit d4606c1b24
1 changed files with 9 additions and 2 deletions
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dataformat/upgrade.txt
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@@ -1,7 +1,14 @@
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 dataformats plugins and have been replaced.
- write_header() has been split into the two functions start_output() and start_sheet().
- write_footer() has been split into 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