Correct way to define array of enums in JSON schema

Question

I want to describe with JSON schema array, which should consist of zero or more predefined values. To make it simple, let's have these possible values: one, two and three.

Correct arrays (should pass validation):

[] ["one", "one"] ["one", "three"] 

Incorrect:

["four"] 

Now, I know the "enum" property should be used, but I can't find relevant information where to put it.

Option A (under "items"):

{     "type": "array",     "items": {         "type": "string",         "enum": ["one", "two", "three"]     } } 

Option B:

{     "type": "array",     "items": {         "type": "string"     },     "enum": ["one", "two", "three"] } 

Answer 1

Option A is correct and satisfy your requirements.

{     "type": "array",     "items": {         "type": "string",         "enum": ["one", "two", "three"]     } }