# tsv

The `tsv` parser plugin parses the TSV format.

## Parameters

See [Parse Section Configurations](https://docs.fluentd.org/configuration/parse-section).

### `keys`

| type            | default            | version |
| --------------- | ------------------ | ------- |
| array of string | required parameter | 0.14.9  |

The array of names for fields on each line.

### `delimiter`

| type   | default | version |
| ------ | ------- | ------- |
| string | `\t`    | 0.14.0  |

The delimiter (character or string) separating TSV values.

## Example

With this configuration:

```
<parse>
  @type tsv
  keys time,host,req_id,user
  time_key time
</parse>
```

This incoming event:

```
2013/02/28 12:00:00\t192.168.0.1\t111\t-
```

is parsed as:

```
time:
1362020400 (2013/02/28/ 12:00:00)

record:
{
  "host"   : "192.168.0.1",
  "req_id" : "111",
  "user"   : "-"
}
```

If you set `null_value_pattern '-'` in the configuration, `user` field becomes `nil` instead of `"-"`.

If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation (CNCF)](https://cncf.io/). All components are available under the Apache 2 License.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.fluentd.org/parser/tsv.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.