> For the complete documentation index, see [llms.txt](https://docs.guardianservice.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.guardianservice.app/technical-information/users/standard-registry-users-schemas-and-policies/policies/available-policy-workflow-blocks/historyaddon.md).

# historyAddOn

This block turn on history on interfaceDocumentsSourceBlock. This block should be placed inside interfaceDocumentsSourceBlock.

### Properties

<table><thead><tr><th>Property Name</th><th width="234">Description</th><th>Example</th><th>Status</th></tr></thead><tbody><tr><td>Tag</td><td>Unique name for the logic block.</td><td>history_addon</td><td></td></tr><tr><td>Permissions</td><td>Which entity has rights to interact at this part of the workflow.</td><td>Registrant</td><td></td></tr><tr><td>Default Active</td><td>Shows whether this block is active at this time and whether it needs to be shown.</td><td>Checked/UnChecked</td><td></td></tr><tr><td>Stop Propagation</td><td>End processing here, don't pass control to the next block.</td><td>Checked/UnChecked</td><td></td></tr><tr><td>On Errors</td><td>Called if the system error has occurs in the Block</td><td> - No action<br> - Retry</td><td></td></tr><tr><td>timelineLabelPath</td><td>Label of timeline point</td><td>“option.status”. It is default value if setting is empty</td><td></td></tr><tr><td>timelineDescriptionPath</td><td>Description of timeline point</td><td>“option.comment”. It is default value if setting is empty</td><td></td></tr></tbody></table>

<figure><img src="/files/WwhqstBuPbKLeVln8isk" alt=""><figcaption></figcaption></figure>