Besides the simple scalar datatypes that we have mentioned, JSON also has null values, arrays, and objects, all of which are supported by Elasticsearch.위에서 언급한 기본 데이터 type외에도, JSON은 null 값, 배열, 오브젝트도 가질 수 있다. Elasticsearch는 이들 모두를 지원한다.Multivalue FieldseditIt is quite possible that we want our tag field to contain more than one tag. Instead of a single string, we could index an array of tags:tag..