Category Attribute

• It is no problem (however probably not recommended) to create an attribute called "Category" in SMW. Just like that Test.
• Furthermore, I put this page in the MW Category "Test":

In the Property page you can see, that Categories (plural) are shown as well as our property Category

However, in a query for the Attribute:Test instead the List of Categories is shown.

<ul><li>« [[Catégorie::Test]] » n’est pas reconnu comme une catégorie ou une annotation de valeur valide.</li> <!--br--><li>Certaines sous-requêtes ont une condition non valide.</li></ul>