How to query the list of property keys and/or property values?

Questions & Help
1

I would like get the list of the property keys available in my graph. Similarly, to get the list of values of a particular property.

Thanks in advance!

2

I don’t know if there is a better way, but following query works for me and lists all property keys:

#+BEGIN_QUERY
{
:query [
    :find ?prop
    :where
      [?b :block/properties ?prop]
]
:view(fn [rows] (for
    [prop (sort (distinct (flatten (map keys rows))))]
    [:div (clojure.string/replace-first (str prop) ":" "") ]))
}
#+END_QUERY
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