Advanced Query: Blocks excluding certain tag

Questions & Help
10

Here is my query
It is supposed to get blocks which contain tag “mytag” and which not contain tag “tag1” OR “tag2” OR “tag3” and which is not a /DONE task

#+BEGIN_QUERY
{
        :title "mytag"
        :query [
                :find (pull ?b [*])
                :where
                [?p :block/name "mytag"]
                [?b :block/refs ?p]
                (not [?b :block/marker "DONE"])
                ;; (not [?b :block/path-refs [:block/name "tag1"]]) 
                ;; (not [?b :block/path-refs [:block/name "tag2"]]) 
                ;; (not [?b :block/path-refs [:block/name "tag3"]])
                ]
        :result-transform :sort-by-priority
        :group-by-page? false
        :breadcrumb-show? false
        :collapsed? false
}
#+END_QUERY