title: How to fix empty semantic media wiki query results after restore?
body: <p>After restoring a semantic media wiki installation from backup the SMW engine does no longer return any query results. I have (re)inserted all regular pages, all form pages, all property pages into the new MW instance. So all content is there but query results remain empty. It seems as the internal data structures maintained by SMW are not filled. How can this be fixed? Are there any specific scripts that need to be run manually?</p>