exclusiveMaximum: function (report, schema) {
        // http://json-schema.org/latest/json-schema-validation.html#rfc.section.5.1.2.1
        if (typeof schema.exclusiveMaximum !== "boolean") {
            report.addError("KEYWORD_TYPE_EXPECTED", ["exclusiveMaximum", "boolean"]);
        } else if (schema.maximum === undefined) {