moodle/mod/upgrade.txt

This files describes API changes in /mod/* - activity modules,
information provided here is intended especially for developers.

=== 2.0 ===

required changes in code:
* use new DML syntax everywhere
* use new DDL syntax in db/upgrade.php
* replace defaults.php by settings.php and db/install.php
* replace STATEMENTS section in db/install.xml by db/install.php
* move post installation code from lib.php into db/install.php
* move uninstallation code from lib.php to db/uninstall.php
* new mandatory intro and introformat table fields in module tables
* completely rewrite file handling
* rewrite backup/restore
* rewrite trusttext support - new db table columns needed
* migrate all module features from mod_edit.php form to lib.php/modulename_supports() function
* implement new gradebook support (legacy 1.8.x grading not supported anymore)
* migrate custom resource module subtypes into separate modules
* migrate to new comments subsystem
* use new $PAGE and $OUTPUT instead of old weblib functions
* theme changes: move plugin styles into mod/xxx/styles.css and use new css markers for images,
                 move all images into new mod/xxx/pix/ directory and use new outputlib api
                 move module icon to mod/xxx/pix/icon.gif
                 old global $THEME is fully replaced by $OUTPUT


optional - no changes needed in older code:
* portfolio support
* course completion tracking support
* add new navigation features



TODO: add links to docs