minimum / maximum for strings

[samgqroberts]

Hi all, sorry if this has already been covered but I couldn't find a discussion for it.

The question

Could we add "minimum" and "maximum"-like keywords for strings?

This would be lexicographic ordering.

Or asked another way: has there been discussion around this, and if so what are the reasons for not including them? (Also, they don't have to be called "minimum" and "maximum" in order to not collide with the numeric keywords. Perhaps "minValue" / "maxValue"?)

Example applications

date / date-time

The "date" and "date-time" formats conform to RFC3339 which was designed, in part, to have lexicographical order correspond with chronological order. Eg. 2023-07-13 is lexicographically less than 2023-07-14 and therefore can be known to be chronologically less than as well, since both conform to the ISO-8601 date format.

Defining a type like {"type": "string", "format": "date", "minimum": "2023-07-13"} would semantically mean "any date chronologically after July 13, 2023, inclusive," which seems like a very natural thing to want to say about dates.