# Categories list

## 1. Description

This node gives the list of all Revit categories and a matching list of their corresponding names.

![](/files/-LVn8je4uuz3SCxAxz-u)

## 2. Outputs

* **Revit Categories**

This output retrieves all Revit categories.

* **Category name(s)**

This output retrieves all category names matching the Revit categories.


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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://datashapes.gitbook.io/primer/revit/categories-list.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.