Querying for non-empty values

From semantic-mediawiki.org

This is not covered by SMW. You can only query for existing property values. Probably you may do a {{#if: {{{Competitor}}} | | {{#set:Competitor provided=No}} }} with the property "Competitor provided" is of data type "boolean" and then query for pages with the "No" boolean.

22:42, 12 December 2013

Thanks for that!

22:15, 20 December 2013