> For the complete documentation index, see [llms.txt](https://knowlg.sunbird.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowlg.sunbird.org/learn/product-and-developer-guide/editors/collection-editor-v2/architecture.md).
# Architecture
### Overview
The below diagram represents the Collection Editor components.
Collection Editor
### Editor Modules
Editor Modules
### Flow diagram
[**Fancytree**](https://github.com/mar10/fancytree/wiki)\
The main purpose of using a fancy tree is to organize your assets in a multi-level hierarchy
[**Sunbird Players**](/learn/product-and-developer-guide/player/v1/players.md)\
The sunbird players are used to preview linked assets such as PDF, Video, EPUB, etc.
[**Common Form (SB-Form)**](https://ed.sunbird.org/use/learn-more/specifications/sunbirded-forms)\
Use Common Forms to define the dynamic layout of a page that contains fields and sections. What makes this dynamic is that you can show/hide the sections & fields based on certain criteria, which is not possible with static page layouts.
[**Telemetry SDK**](https://telemetry.sunbird.org/)\
This is used for generating the telemetry from the editor as a utility dependency library.
**Common Service Lib**\
This is used to send the telemetry to the server.
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