# Getting started

The Felt Style Language is a way for advanced users to style data quickly, through simple JSON code. This document is a guide to use as you test data files in Felt. For an exhaustive guide to all supported properties see the Reference Documentation.

## Style definition blocks

Learn how to define and configure the code blocks that compose the Felt Style Language

{% content-ref url="style-definition-blocks" %}
[style-definition-blocks](https://developers.felt.com/felt-style-language/style-definition-blocks)
{% endcontent-ref %}

## Types of visualizations

Learn about visualization types, including simple, categorical, numeric (color by & size by), heatmaps and hillshade.

{% content-ref url="types-of-visualizations" %}
[types-of-visualizations](https://developers.felt.com/felt-style-language/types-of-visualizations)
{% endcontent-ref %}

## Legends

Details on how to customize legends on a per-layer basis.

{% content-ref url="legends" %}
[legends](https://developers.felt.com/felt-style-language/legends)
{% endcontent-ref %}

## Errors

Definitions for errors raised when validating the Felt Style Language.

{% content-ref url="errors" %}
[errors](https://developers.felt.com/felt-style-language/errors)
{% endcontent-ref %}


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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://developers.felt.com/felt-style-language/getting-started.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.