aaronbullard/php-schema

{
    "title": "invoice",
    "type": "object",
    "properties": {
        "person": {"$ref": "person.json"},
        "address": {"$ref": "address.json"},
        "lineItems": {
            "type": "array",
            "items": {"$ref": "line_item.json"}
        },
        "taxRate": {"type": "number"},
        "pay": {
            "type": "integer",
            "minimum": 0
        }
    },
    "required": ["person", "address", "taxRate"],
    "additionalProperties": false
}