# Policy reference

## Description

The policy reference is used to reference a policy element. The reference is made by id of the policy. However, the mechanism for resolving a policy set reference to the corresponding policy is outside the scope of this specification.

## Related objects

- [**Policy**](https://bookstack.soffid.com/books/xacml/page/policy "Policy")

## Standard attributes

- **Identifier**: policy set identifier.
- **Version**: 
    - **Specific version**: specifies a matching expression for the version of the policy referenced
    - **Version range**: specifies a range of version
    - **Any version**

## Actions

<table border="1" id="bkmrk-apply-changes-allow-"><tbody><tr style="height: 57px;"><td style="width: 140px; height: 57px;">**Apply changes**

</td><td style="width: 669px; height: 57px;">Allows you to save the data of a new policy reference or to update the data of a specific policy reference. To save the data it will be mandatory to fill in the required fields

</td></tr><tr style="height: 35px;"><td style="width: 140px; height: 35px;">**Undo**

</td><td style="width: 669px; height: 35px;">Allows you to quit without applying any changes.

</td></tr><tr style="height: 57px;"><td style="width: 140px; height: 57px;">**Delete**

</td><td style="width: 669px; height: 57px;">Allows you to delete a policy reference. You can choose that option on the hamburguer icon. To perform that action, Soffid will ask you for confirmation, you could confirm or cancel the operation.

</td></tr><tr style="height: 35px;"><td style="width: 140px; height: 35px;">**Export**

</td><td style="width: 669px; height: 35px;">Allows you to export a XML file that contain the policy reference.

</td></tr><tr style="height: 35px;"><td style="width: 140px; height: 35px;">**Add new version**

</td><td style="width: 669px; height: 35px;">Allows you to add a new versión of the policy reference

</td></tr></tbody></table>

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*http://docs.oasis-open.org/xacml/2.0/access\_control-xacml-2.0-core-spec-os.pdf*