# Content-type and content-encoding properties

Content-type and content-encoding properties of files uploaded to Amazon S3

| Replication Artifact | File Format | Compression | Content-Type | Content-Encoding |
| --- | --- | --- | --- | --- |
| Data file | CSV | None | text/csv; charset=utf-8 | N/A |
| Data file | CSV | gzip | text/csv; charset=utf-8 | gzip |
| Data file | JSON (lines) | None | application/x-ndjson | N/A |
| Data file | JSON (lines) | gzip | application/x-ndjson | gzip |
| Metadata file (DFM) | JSON | None | application/json | N/A |