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## NDJSON Representation of Resources

| Responsible Owner: [\[%wgt its%\]]([%wg its%]) Work Group | [Standards Status](versions#std-process):[Normative](versions#std-process) |
| --- | --- |

NDJSON ([New line delimited JSON](https://github.com/ndjson/ndjson-spec)) is a variant of the NDJSON format that is supported for bulk data transfer. In principle, NDJSON is a simple variation on [the JSON format](json), but where resources are serialized with no whitespace, and separated by a newline pair (characters 13 and 10).

Example:

{ "resourceType" : "\[type\]", .... }
{ "resourceType" : "\[type\]", .... }

The MIME-type for this format is `application/fhir+ndjson`.

In order to simplify NDJSON processing, each NDJSON document SHALL only contain resources of a single type - every line contains a resource of a particular type. (though note that resources may still contain [contained resources](domainresource-definitions#DomainResource.contained) of various types).

On the [RESTful API](http), the NDJSON format can only be retrieved using the [Asynchronous Pattern](async).

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