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

# Content filters overview

You can use the API to configure which HTML elements should be included or excluded from audio generation.

For example, if you want to exclude `<h2>` subheadings from audio generation, you can add a filter to do so.

```json Example theme={null}
{
  "element_type": "h2",
  "include": false,
}
```

To make content filters as flexible as possible, you can define them based on the following:

* `element_type`: `<H2>`, `<blockquote>`, `<ul>`, `<table>` etc.
* `element_class`: `.header`, `.footer`, `.aside` etc.
* `element_id`: `#advert`, `#related`, `#navigation` etc.
* `element_data`: `data-include`, `data-exclude` etc.
* `element_xpath`: `//\*[@role='dialog']` etc.
* `value`: “Sponsored” etc

You can also combine attributes to create more targeted filters. For example, to exclude only `<h3>` subheadings with the class “header” that contain the word “title”:

```json Example theme={null}
{
  "element_type": "h3",
  "element_class": "header",
  "value": "title",
  "include": false,
}
```

**Note**: Other than with `element_xpath`, when specifying elements, classes, or other HTML attributes, provide only the name or identifier. Do not include prefix characters such as \<, ., #, or any other syntax.