> For the complete documentation index, see [llms.txt](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/browsing-and-searching/semantic-queries/project-explorer-view.md).

# Project Explorer View

 The Project Explorer View displays the contents of your local workspace folder, which is organized into projects. Projects are essentially folders that contain files and subfolders. 

{% hint style="info" %}
Files that end with `.ecl` are used to create semantic queries. 
{% endhint %}

To open the ECL Editor, double-click on a file.

![Project Explorer with ECL Files](https://content.gitbook.com/content/N7ynFOLTw3W9Zow9AaAJ/blobs/MK558mzzDzM6OzgnlgY6/project_explorer.png)

Project Explorer View toolbar actions:

* ![](https://content.gitbook.com/content/N7ynFOLTw3W9Zow9AaAJ/blobs/32x1iYz0BlUtUwHWjlvD/611025831.png) *Collapse all*: Collapses all open nodes
* ![](https://content.gitbook.com/content/N7ynFOLTw3W9Zow9AaAJ/blobs/FLaUzrR3yyNE424eussr/602735474%20\(2\)%20\(1\).png) *Link with Editor:* Connects the ECL Editor with the Project Explorer View.
*  ![](https://content.gitbook.com/content/N7ynFOLTw3W9Zow9AaAJ/blobs/f8QnGQlmjddAs4vasRT7/image.png) Filter: Select and customize filters