This question already has an answer here:
I came across this example:
(setq h-data '((:num 1 :key "apple") (:num 9 :key "berry") (:num 2 :key "cactus") (:num 5 :key "dog") (:num 4 :key "frog")))
The source said that this is a property list. So, I looked up the manual and did not notice any syntax using a colon. What is this syntax? Is
:num different from
'num? Where is this syntax described in the manual?