# Architecture

![Question Set Editor - Architecture](/files/r3lXC3kdWvLnvgtoNbTI)

#### [FancyTree](https://github.com/mar10/fancytree/wiki)

The main purpose of using a fancy tree is a tree view/tree grid that allows to dynamically render powerful, user-friendly tree view, drag\&drop, lazy loading, efficient and performant handling of large data sets.

[**CKEditor5**](https://ckeditor.com/ckeditor-5/)

CKEditor provides features to add images, mathematical formula, formatting of texts as per the needs, etc in questions.

#### [Question Set Player](https://inquiry.sunbird.org/learn/product-and-developer-guide/question-set-player)

The sunbird players is used to preview Question and Questionset.

#### [Common Form (Sunbird Form)](https://ed.sunbird.org/use-1/independent-libraries/sunbirded-forms)

Use Common Forms to define the dynamic layout of a page that contains fields and sections. What makes this dynamic is you can show/hide the sections & fields based on certain criteria, which currently is not possible with static page layouts.

#### [Telemetry SDK](https://telemetry.sunbird.org/)

Telemetry SDK is a standalone telemetry JS library allows to capture telemetry data.


---

# 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://inquiry.sunbird.org/learn/product-and-developer-guide/question-and-question-set-editor/architecture.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.