I tried a query with a subquery on Special:Ask that is somehow easier the the example on http://www.semantic-mediawiki.org/wiki/Help:Selecting_pages#Subqueries_and_property_chains
[[Type of Document::<q>[[Category:Type of Document]]</q>]]
I want: Show me all pages where the property "Type of document" is one of the values that is within the "Category:Type of Document"
And what I get is a wrong result (no pages are shown) as I m sure about all values "Type of Document" are from Category:Type of Document. Im surprised about the negated query (watch for the !) :
[[Type of Document::!<q>[[Category:Type of Document]]</q>]]
results in a full list of pages. I think that query looks for pages that contain ALL values from the list [[Category:Type of Document]] not ONE as expected by me and shown in the example.
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