How can I filter for the space category in the Advanced Search?

You can create a checkbox "space category = x" within the Advanced Search Macro. This could be used to filter search results for languages, for example. To do so, proceed as follows:

1. Edit the page containing the Advanced Search macro.

2. Within the Adv. Search macro, insert a Search Checkbox Macro.

3. Switch the radio button to "advanced" and insert this string: space.category = x

4. In the field "Label of the checkbox", insert "space category x" (or something similar).
   

   

   
   

5. Decide if the checkbox should be checked per default.

6. Save the macro.

7. Copy the new checkbox macro and paste it into the existing Adv. Search macros if needed.