> For the complete documentation index, see [llms.txt](https://docs.b2ihealthcare.com/snowray/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/snowray/snowray-v1.1.1/reference/access.md).

# Access management

Authors maintaining [resources](/snowray/snowray-v1.1.1/reference/resources.md) might need to restrict the accessibility of those. Snowray provides different types of roles to define which user is allowed to perform an action or to see a specific resource. Besides specifying roles for individual users, it is also possible to determine groups of users with associated roles. A more detailed description of user role permissions can be found [below](#user-roles-and-permissions).

![User Role Permissions](/files/-MjE6JPnnUfrOCCFq1pp)

### :busts\_in\_silhouette: User Roles and Permissions

|              |                **Read**                |                        **Write**                       |                          **Administrator**                         |
| ------------ | :------------------------------------: | :----------------------------------------------------: | :----------------------------------------------------------------: |
| **Export**   | Export a shared resource in any format |         Export a shared resource in any format         |                  Export any resource in any format                 |
| **Browse**   |         Browse shared resources        |                 Browse shared resources                |                    Browse any type of resources                    |
| **Edit**     |                    -                   | Edit shared value set clauses and concept map mappings | Edit the overview page, value set clauses and concept map mappings |
| **Create**   |                    -                   |                    Create resources                    |                          Create resources                          |
| **Release**  |                    -                   |                            -                           |                          Create a release                          |
| **Share**    |                    -                   |                            -                           |                     Manage access of a resource                    |
| **Settings** |                    -                   |                            -                           |                     Delete or retire resources                     |

Administrators can share resources, edit individual user or group roles, and revoke access to resources after visiting the *Sharing* tab of the selected resource. More can be found on these topics under the following pages:

{% content-ref url="/pages/-MjEhf9epLGp7erCI3FO" %}
[Sharing Resources](/snowray/snowray-v1.1.1/reference/access/sharing-resources.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MjEhmMMNKFIFZo\_6wdk" %}
[Change Roles](/snowray/snowray-v1.1.1/reference/access/change-roles.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MjEhshapSPo6dsAWsKZ" %}
[Revoke Access](/snowray/snowray-v1.1.1/reference/access/revoke-access.md)
{% endcontent-ref %}

{% hint style="info" %}
Resources only appear for users who are granted access to them.
{% endhint %}

User roles are restricted to resources. A user can have different types of permissions to different resources and can have multiple roles if they are present in a group with permission to the resource as well.

{% hint style="info" %}
When having multiple roles, the role with the higher accessibility feature will always be the one taken into consideration when trying to access a resource.
{% endhint %}


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