some rudimentary model of class

src/main/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl.cljc

@@ -3,6 +3,7 @@
    is realized in deep implemented."
   (:require
    [clojure.spec.alpha :as s]
+   [org.domaindrivenarchitecture.activity-pub-poc.predicates :as p]
    [orchestra.core :refer [defn-spec]]))
 
 ; Properties:https://www.w3.org/TR/owl-ref/#Property
@@ -11,7 +12,12 @@
 
 ;http://www.w3.org/2002/07/owl#Class
 ;https://www.w3.org/TR/owl-ref/#Class-def
-(s/def ::Class any?)
+(defn-spec owl-class? boolean?
+  [elem any?]
+  (or (p/uri-string? elem)
+      (map? elem)
+      (vector? elem)))
+(s/def ::Class owl-class?)
 
 ;http://www.w3.org/2002/07/owl#DatatypeProperty
 (s/def ::DatatypeProperty any?)

src/test/cljc/org/domaindrivenarchitecture/activity_pub_poc/owl_test.cljc

@@ -12,3 +12,10 @@
   (is (not (sut/functional? [])))
   (is (not (sut/functional? nil)))
   (is (not (sut/functional? [1 2]))))
+
+(deftest owl-class-predicate
+  (is (sut/owl-class? "http://some.uri"))
+  (is (sut/owl-class? {:as "class-definition"}))
+  (is (sut/owl-class? []))
+  (is (not (sut/owl-class? "str")))
+  (is (not (sut/owl-class? nil))))