Correct way to define array of enums in JSON schema
Option A is correct and satisfy your requirements.
{ "type": "array", "items": { "type": "string", "enum": ["one", "two", "three"] }}
According to json-schema documentation, the enumerated values of an array must be included in the "items" field:
{ "type": "array", "items": { "type": "string", "enum": ["one", "two", "three"] }}If you have an array that can hold e.g. items of different type, then your schema should look like the one below:
{ "type": "array", "items": [ { "type": "string", "enum": ["one", "two", "three"] }, { "type": "integer", "enum": [1, 2, 3] } ]}