All page forms of a certain category should be listet.
The following query does not give a single results even if there should be at least one:
{{#ask:
[[Form:+]]
[[Category:test1]]
}}
By default, SMW is only activated in main namespace. You have to add the form
namespace to SMW scope, by adding it to LocalSettings.php :
$smwgNamespacesWithSemanticLinks[106] = true;
Here value 106
corresponds to default namespace Form
, but it may vary from a system to another. Check it. Also, you will have to refresh your semantic store for changes to propagate. Adding a new namespace to SMW will not automatically re-parse all form pages to add it to the store. If you have a limited number of forms, you may just edit and save them to integrate them in the semantic store.