I would say it's more accurate to call an HTTP request or a JSON object a subset of the set of all strings. If step out the realm of sets and into programing l

I would say it's more accurate to call an HTTP request or a JSON object a subset of the set of all strings. If step out the realm of sets and into programing languages types are very similar to sets. Heck there is type theory which also is very similar to set theory, but has a few difference.