# Policy ## Description > A Policy represents a single access control policy, expressed through a set of Rules. ## Screen overview [![image-1628241334202.png](https://bookstack.soffid.com/uploads/images/gallery/2021-08/scaled-1680-/image-1628241334202.png)](https://bookstack.soffid.com/uploads/images/gallery/2021-08/image-1628241334202.png) ## Related objects - [**Policy set**](https://bookstack.soffid.com/books/xacml/page/policy-set "Policy set") - **[Target](https://bookstack.soffid.com/books/xacml/page/target "Target")** - **[Variables](https://bookstack.soffid.com/books/xacml/page/variables "Variables")** - **[Rules](https://bookstack.soffid.com/books/xacml/page/rules "Rules")** - **[Obligations](https://bookstack.soffid.com/books/xacml/page/obligations "Obligations")** ## Standard attributes ### Policy set - **Identifier**: identify the policy. - **Version**: version of the policy. - **Description**: brief description of the policy. - **Policy Combining Algorithm:** determines how the different rules will be applied. You can visit the [XACML Rule combining algorithm page](https://bookstack.soffid.com/books/xacml/page/xacml-rule-combining-algorithm "XACML Rule combining algorithm") for more information. ### Target The policy result will be MATCHES if it all the target elements defined match. - [Subjects](https://bookstack.soffid.com/link/317#bkmrk-subjects) - [Resources](https://bookstack.soffid.com/link/317#bkmrk-resources) - [Actions](https://bookstack.soffid.com/link/317#bkmrk-actions) - [Environments](https://bookstack.soffid.com/Environments) ### Variables - [Variables](https://bookstack.soffid.com/books/xacml/page/variables "Variables") ### Rules - [Rules](https://bookstack.soffid.com/books/xacml/page/rules "Rules") ### Obligations - [Obligations](https://bookstack.soffid.com/books/xacml/page/obligations "Obligations") ## Actions
**Apply changes** Allows you to save the data of a new policy or to update the data of a specific policy. To save the data it will be mandatory to fill in the required fields
**Undo** Allows you to quit without applying any changes.
**Delete** Allows you to delete a policy. You can choose that option on the trash icon.To perform that action, Soffid will ask you for confirmation, you could confirm or cancel the operation.
**Export** Allows you to export a XML file that contain the policy.
**Add new version** Allows you to add a new versiĆ³n of the policy.
--- [*https://www.oasis-open.org/committees/download.php/2713/Brief\_Introduction\_to\_XACML.html*](https://www.oasis-open.org/committees/download.php/2713/Brief_Introduction_to_XACML.html)