# LTSV

The *LTSV* parser lets you parse data in the [Labeled Tab-separated Values (LTSV)](http://ltsv.org/) format.

LTSV is a variant of the Tab-separated Values (TSV) format. Each record in an LTSV file is represented as a single line. Each field is separated by a tab and has a label and a value. The label and its value are separated by a colon (`:`).

Here is an example how to use this format in the Apache access log.

Configure this in `httpd.conf`:

```
LogFormat "host:%h\tident:%l\tuser:%u\ttime:%t\treq:%r\tstatus:%>s\tsize:%b\treferer:%{Referer}i\tua:%{User-Agent}i" combined_ltsv
CustomLog "logs/access_log" combined_ltsv
```

The following is an example parsers configuration file:

{% tabs %}
{% tab title="parsers.yaml" %}

```yaml
parsers:
  - name: access_log_ltsv
    format: ltsv
    time_key: time
    time_format: '[%d/%b/%Y:%H:%M:%S %z]'
    types: status:integer size:integer
```

{% endtab %}

{% tab title="parsers.conf" %}

```
[PARSER]
  Name        access_log_ltsv
  Format      ltsv
  Time_Key    time
  Time_Format [%d/%b/%Y:%H:%M:%S %z]
  Types       status:integer size:integer
```

{% endtab %}
{% endtabs %}

The following log entry is valid content for the previously defined parser:

```
...
host:127.0.0.1  ident:- user:-  time:[10/Jul/2018:13:27:05 +0200]       req:GET / HTTP/1.1      status:200      size:16218      referer:http://127.0.0.1/       ua:Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0
host:127.0.0.1  ident:- user:-  time:[10/Jul/2018:13:27:05 +0200]       req:GET /assets/plugins/bootstrap/css/bootstrap.min.css HTTP/1.1        status:200      size:121200     referer:http://127.0.0.1/       ua:Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0
host:127.0.0.1  ident:- user:-  time:[10/Jul/2018:13:27:05 +0200]       req:GET /assets/css/headers/header-v6.css HTTP/1.1      status:200      size:37706      referer:http://127.0.0.1/       ua:Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0
host:127.0.0.1  ident:- user:-  time:[10/Jul/2018:13:27:05 +0200]       req:GET /assets/css/style.css HTTP/1.1  status:200      size:1279       referer:http://127.0.0.1/       ua:Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0
...
```

After processing, its internal representation will be:

```
...
[1531222025.000000000, {"host"=>"127.0.0.1", "ident"=>"-", "user"=>"-", "req"=>"GET / HTTP/1.1", "status"=>200, "size"=>16218, "referer"=>"http://127.0.0.1/", "ua"=>"Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0"}]
[1531222025.000000000, {"host"=>"127.0.0.1", "ident"=>"-", "user"=>"-", "req"=>"GET /assets/plugins/bootstrap/css/bootstrap.min.css HTTP/1.1", "status"=>200, "size"=>121200, "referer"=>"http://127.0.0.1/", "ua"=>"Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0"}]
[1531222025.000000000, {"host"=>"127.0.0.1", "ident"=>"-", "user"=>"-", "req"=>"GET /assets/css/headers/header-v6.css HTTP/1.1", "status"=>200, "size"=>37706, "referer"=>"http://127.0.0.1/", "ua"=>"Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0"}]
[1531222025.000000000, {"host"=>"127.0.0.1", "ident"=>"-", "user"=>"-", "req"=>"GET /assets/css/style.css HTTP/1.1", "status"=>200, "size"=>1279, "referer"=>"http://127.0.0.1/", "ua"=>"Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0"}]
...
```

The time was converted to Unix timestamp (UTC).


---

# 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.fluentbit.io/manual/4.0/data-pipeline/parsers/ltsv.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.