{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "description": "10/EPMP get metadata keys response: a set of endpoint metadata keys",
    "type": "array",
    "items": {
        "type": "string",
        "pattern": "^[a-zA-Z0-9_]+$",
        "description": "Endpoint metadata key name"
    },
    "_uniqueItems": true
}