# `IngestDissectProcessor` [interface-IngestDissectProcessor]

| Name | Type | Description |
| - | - | - |
| `append_separator` | string | The character(s) that separate the appended fields. |
| `field` | [Field](./Field.md) | The field to dissect. |
| `ignore_missing` | boolean | If `true` and `field` does not exist or is `null`, the processor quietly exits without modifying the document. |
| `pattern` | string | The pattern to apply to the field. |