Help:Upgrade/Upgrade from SMW 1.8 to SMW 1.9.0

This help page describes the upgrade procedure from Semantic MediaWiki 1.8.x to Semantic MediaWiki 1.9.x with native Composer support.

Step 1 - Backup database and wiki
Backup your wiki database and wiki installation.

Step 2 - Delete old software
Delete the directories  and   from the   directory.

Step 3 - Update configuration file
Remove the formerly required invocations of "Semantic MediaWiki" and "Validator" from the "LocalSettings.php" file, i.e. the following two lines:

Step 3 - Re-install new software
Re-install Semantic MediaWiki as described on the applicable page.

Done!
Semantic MediaWiki and the database use should now be upgraded properly. The wiki may now be used again.