Currently fixed properties [1] have to be defined within the fixed properties array in SMW_SQLStore3.php [2] which is not upgrade proof. Thus it would be nice to be able to set them up within LocalSettings.php
[1] https://semantic-mediawiki.org/wiki/Fixed_properties
[2] http://semantic-mediawiki.org/doc/SMW__SQLStore3_8php_source.html#l00208
Version: unspecified
Severity: enhancement