> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# DEE echo output column

> Reference for the `echoOutputColumn` output column type in a DEE order, which writes a constant `value` into every extracted row, including its `header`, `prefix`, and `suffix` properties.

## JSON structure

```json theme={"languages":{"custom":["/engine/python-sdk/0.9/languages/pycon.tmLanguage.json"]}}
"columns": [
  {
    "@type": "echoOutputColumn",
    "header": "head", 
    "value" : "echo value",
    "prefix": "",
    "suffix": ""
  },
```

## Property details

| Property | Values                                 | Default Value |
| -------- | -------------------------------------- | ------------- |
| header   | String - Header of column              |               |
| value    | String - Value to put in rows          |               |
| prefix   | String - a prefix to add to all levels |               |
| suffix   | String - a suffix to add to all levels |               |