---
title: "Options of apache-accesslog-parser() parsers"
url: "https://axoflow.com/docs/axosyslog-core/4.28/chapter-parsers/apache-access-log-parser/apache-accesslog-options/"
last_modified: "2023-07-02T20:37:04+02:00"
---

> For the complete documentation index, see [llms.txt](https://axoflow.com/docs/axosyslog-core/4.28/llms.txt).

# Options of apache-accesslog-parser() parsers

The `apache-accesslog-parser()` has the following options.

## prefix()

|  |  |
| --- | --- |
| Synopsis: | prefix() |

*Description:* Insert a prefix before the name part of the parsed name-value pairs to help further processing. For example:

- To insert the `my-parsed-data.` prefix, use the `prefix(my-parsed-data.)` option.
- To refer to a particular data that has a prefix, use the prefix in the name of the macro, for example, `${my-parsed-data.name}`.
- If you forward the parsed messages using the IETF-syslog protocol, you can insert all the parsed data into the SDATA part of the message using the `prefix(.SDATA.my-parsed-data.)` option.

Names starting with a dot (for example, `.example`) are reserved for use by AxoSyslog. If you use such a macro name as the name of a parsed value, it will attempt to replace the original value of the macro (note that only soft macros can be overwritten, see [Hard versus soft macros](https://axoflow.com/docs/axosyslog-core/4.28/chapter-manipulating-messages/customizing-message-format/macros-hard-vs-soft/index.md) for details). To avoid such problems, use a prefix when naming the parsed values, for example, `prefix(my-parsed-data.)`

By default, `apache-accesslog-parser()` uses the `.apache.` prefix. To modify it, use the following format:

```shell
   parser {
        apache-accesslog-parser(prefix("apache."));
    };
```

## template()

|  |  |
| --- | --- |
| Synopsis: | `template("${<macroname>}")` |

*Description:* The macro that contains the part of the message that the parser will process. It can also be a macro created by a previous parser of the log path. By default, the parser processes the entire message (`${MESSAGE}`).

Last modified July 2, 2023: [Change highlight mode of code examples (2f8a9593)](https://github.com/axoflow/axosyslog-core-docs/commit/2f8a95937c6498193e7168ce8b0dc831e9f0f8ad)